Nc last frost date 2023

A frost date is the average date of the last light freeze in spring or the first light freeze in fall. The classification of freeze temperatures is based on their effect on plants: Light freeze: 29° to 32°F (-1.7° to 0°C)—tender plants are killed. Moderate freeze: 25° to 28°F (-3.9° to -2.2°C)—widely destructive to most vegetation.

Nc last frost date 2023. Sep 24. Sep 27. Sep 29. Oct 2. Oct 4. Oct 7. Oct 10. Oct 14. Now that you know your frost dates, use our Garden Planting Calendar for Boone, North Carolina to know when to sow and transplant your various vegetable plants!

A frost date is the average date of the last light freeze in spring or the first light freeze in fall. The classification of freeze temperatures is based on their effect on plants: Light freeze: 29° to 32°F (-1.7° to 0°C)—tender plants are killed. Moderate freeze: 25° to 28°F (-3.9° to -2.2°C)—widely destructive to most vegetation.

The average depth of the frost line in Iowa is 58 inches. In the northern part of the state, the frost line can be up to 70 inches deep, while in the southern part the line may be ...You have a small 20% chance of getting 32° by October 19. There is a 50% chance of being hit by a 32° frost starting around October 30. You have a 80% chance of seeing 32° by November 10. Said another way, you have a 1 in 5 chance at making it to that day without a 32° night. In the Fall.You have a small 20% chance of getting 32° by November 6. There is a 50% chance of being hit by a 32° frost starting around November 18. You have a 80% chance of seeing 32° by November 29. Said another way, you have a 1 in 5 chance at making it to that day without a 32° night. In the Fall.See the average first and last frost dates for locations across the U.S. and Canada with our frost dates calculator. Simply enter your postal code to see when the last spring frost date and first fall frost date typically occur in your area.A frost date is the average date of the last light freeze in spring or the first light freeze in fall. The classification of freeze temperatures is based on their effect on plants: Light freeze: 29° to 32°F (-1.7° to 0°C)—tender plants are killed. Moderate freeze: 25° to 28°F (-3.9° to -2.2°C)—widely destructive to most vegetation.The first frost date is the earliest date in the year that frost is expected to occur, while the last frost date is the latest date that frost is expected. These dates can vary greatly depending on the location and climate, with some areas experiencing frost as early as September and as late as May. In the UK, the average first frost date is ...A frost date is the average date of the last light freeze in spring or the first light freeze in fall. The classification of freeze temperatures is based on their effect on plants: Light freeze: 29° to 32°F (-1.7° to 0°C)—tender plants are killed. Moderate freeze: 25° to 28°F (-3.9° to -2.2°C)—widely destructive to most vegetation.

A frost date is the average date of the last light freeze in spring or the first light freeze in fall. The classification of freeze temperatures is based on their effect on plants: Light freeze: 29° to 32°F (-1.7° to 0°C)—tender plants are killed. Moderate freeze: 25° to 28°F (-3.9° to -2.2°C)—widely destructive to most vegetation.Jun. 1 - Jun. 10. Zone 12. Jun. 11 - Jun. 20. Zone 13. Jun. 21 - Jun. 30. + -. Leaflet | ©Plantmaps ©OpenStreetMap Contributors. Plantmaps has derived zones indicating the Interactive map of average annual Last frost dates for the province of Ontario.A frost date is the average date of the last light freeze in spring or the first light freeze in fall. The classification of freeze temperatures is based on their effect on plants: Light freeze: 29° to 32°F (-1.7° to 0°C)—tender plants are killed. Moderate freeze: 25° to 28°F (-3.9° to -2.2°C)—widely destructive to most vegetation.Oct 22. Oct 26. Oct 29. Nov 2. Nov 5. Nov 9. Nov 15. Now that you know your frost dates, use our Garden Planting Calendar for Moyock, North Carolina to know when to sow and transplant your various vegetable plants!A frost date is the average date of the last light freeze in spring or the first light freeze in fall. The classification of freeze temperatures is based on their effect on plants: Light freeze: 29° to 32°F (-1.7° to 0°C)—tender plants are killed. Moderate freeze: 25° to 28°F (-3.9° to -2.2°C)—widely destructive to most vegetation.A frost date is the average date of the last light freeze in spring or the first light freeze in fall. The classification of freeze temperatures is based on their effect on plants: Light freeze: 29° to 32°F (-1.7° to 0°C)—tender plants are killed. Moderate freeze: 25° to 28°F (-3.9° to -2.2°C)—widely destructive to most vegetation.

Apr 26, 2024 ... Answer. Based on the 1991 - 2022 US Climate Normals published by NOAA, the average day for the last spring freeze in ... A light frost is when temperatures are between 29°–32°F. During a light frost, tender plants may be killed, with little destructive effect on hardier vegetation. The probability of a frost occurring after the spring date or before the fall frost date listed below is 30%, which means that a frost could occur before or after the dates listed. Someone who wants to take care of a pygmy date palm tree should avoid watering it too much, not over prune it and use fertilizers that develop the right soil environment. In additi... A frost date is the average date of the last light freeze in spring or the first light freeze in fall. The classification of freeze temperatures is based on their effect on plants: Light freeze: 29° to 32°F (-1.7° to 0°C)—tender plants are killed. Moderate freeze: 25° to 28°F (-3.9° to -2.2°C)—widely destructive to most vegetation.

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Highlights. This map shows the average date past which the chances that the temperature will remain above freezing for the rest of the season are higher than the chances of return to freezing temperatures. On average, the last freeze of the season across most of the United States occurs after the first day of spring. You have a small 20% chance of getting 32° by October 19. There is a 50% chance of being hit by a 32° frost starting around October 30. You have a 80% chance of seeing 32° by November 10. Said another way, you have a 1 in 5 chance at making it to that day without a 32° night. In the Fall. A frost date is the average date of the last light freeze in spring or the first light freeze in fall. The classification of freeze temperatures is based on their effect on plants: Light freeze: 29° to 32°F (-1.7° to 0°C)—tender plants are killed. Moderate freeze: 25° to 28°F (-3.9° to -2.2°C)—widely destructive to most vegetation.Click Here to go to the interactive version of the Average First and Last Freeze Date. Click the radial buttons at the top to switch between First Frost and Last …Average Date of First Frost (fall) November 15. Lowest Expected Low. 15°F. Highest Expected Low. 20°F. This means that on a really cold year, the coldest it will get is 15°F . On most years you should be prepared to experience lows near 20°F . Below is a list of planting guides for Zone 8b.

A frost date is the average date of the last light freeze in spring or the first light freeze in fall. The classification of freeze temperatures is based on their effect on plants: Light freeze: 29° to 32°F (-1.7° to 0°C)—tender plants are killed. Moderate freeze: 25° to 28°F (-3.9° to -2.2°C)—widely destructive to most vegetation.Shopping for a new car is an exciting experience, but it can also be overwhelming. With so many dealerships to choose from, it can be difficult to decide which one is right for you...A frost date is the average date of the last light freeze in spring or the first light freeze in fall. Light freeze: 29° to 32°F (-1.7° to 0°C)—tender plants are killed. Moderate freeze: 25° to 28°F (-3.9° to -2.2°C)—widely destructive to most vegetation. Severe freeze: 24°F (-4.4°C) and colder—heavy damage to most garden plants.Want to know when to expect your last frost of the spring, or the first frost of the fall? Enter your zip code (or City, State) below and we'll tell you what we know. Our information is taken directly from the National Weather Service and depending on the location of the reporting station for your zip code, the results may vary. Popular Plants.Our frost date calculator will tell you precisely when your garden in durham, nc is at risk for frost.14 Sep. Do you know your frost dates? It's harvest time and the nights are getting cooler. The average first frost date is October 26th in Asheville according to the NC Extension. …A frost date is the average date of the last light freeze in spring or the first light freeze in fall. The classification of freeze temperatures is based on their effect on plants: Light freeze: 29° to 32°F (-1.7° to 0°C)—tender plants are killed. Moderate freeze: 25° to 28°F (-3.9° to -2.2°C)—widely destructive to most vegetation.A frost date is the average date of the last light freeze in spring or the first light freeze in fall. The classification of freeze temperatures is based on their effect on plants: Light freeze: 29° to 32°F (-1.7° to 0°C)—tender plants are killed. Moderate freeze: 25° to 28°F (-3.9° to -2.2°C)—widely destructive to most vegetation.Oct 9. Oct 11. Oct 13. Oct 16. Oct 18. Oct 21. Oct 25. Now that you know your frost dates, use our Garden Planting Calendar for Winston Salem, North Carolina to know when to sow and transplant your various vegetable plants!

Frost Dates: First and last frost dates for Statesville, NC - Garden.org. How to read these charts for the spring. As the growing season approaches, the days get longer, the …

Last Frost Dates were calculated using daily climate data from the period between 1991-2020. Related Pages List of Average Last Frost Dates for Locations in North Carolina A frost date is the average date of the last light freeze in spring or the first light freeze in fall. The classification of freeze temperatures is based on their effect on plants: Light freeze: 29° to 32°F (-1.7° to 0°C)—tender plants are killed. Moderate freeze: 25° to 28°F (-3.9° to -2.2°C)—widely destructive to most vegetation.A frost date is the average date of the last light freeze in spring or the first light freeze in fall. The classification of freeze temperatures is based on their effect on plants: Light freeze: 29° to 32°F (-1.7° to 0°C)—tender plants are killed. Moderate freeze: 25° to 28°F (-3.9° to -2.2°C)—widely destructive to most vegetation.A frost date is the average date of the last light freeze in spring or the first light freeze in fall. The classification of freeze temperatures is based on their effect on plants: Light freeze: 29° to 32°F (-1.7° to 0°C)—tender plants are killed. Moderate freeze: 25° to 28°F (-3.9° to -2.2°C)—widely destructive to most vegetation.Average Date of First Frost (fall) October 15. Lowest Expected Low. 5°F. Highest Expected Low. 10°F. This means that on a really cold year, the coldest it will get is 5°F . On most years you should be prepared to experience lows near 10°F . Below is a list of planting guides for Zone 7b.A frost date is the average date of the last light freeze in spring or the first light freeze in fall. The classification of freeze temperatures is based on their effect on plants: Light freeze: 29° to 32°F (-1.7° to 0°C)—tender plants are killed. Moderate freeze: 25° to 28°F (-3.9° to -2.2°C)—widely destructive to most vegetation.Average Date of First Frost (fall) November 15. Lowest Expected Low. 10°F. Highest Expected Low. 15°F. This means that on a really cold year, the coldest it will get is 10°F . On most years you should be prepared to experience lows near 15°F . Below is a list of planting guides for Zone 8a.A frost date is the average date of the last light freeze in spring or the first light freeze in fall. The classification of freeze temperatures is based on their effect on plants: Light freeze: 29° to 32°F (-1.7° to 0°C)—tender plants are killed. Moderate freeze: 25° to 28°F (-3.9° to -2.2°C)—widely destructive to most vegetation.A frost date is the average date of the last light freeze in spring or the first light freeze in fall. The classification of freeze temperatures is based on their effect on plants: Light freeze: 29° to 32°F (-1.7° to 0°C)—tender plants are killed. Moderate freeze: 25° to 28°F (-3.9° to -2.2°C)—widely destructive to most vegetation.A frost date is the average date of the last light freeze in spring or the first light freeze in fall. The classification of freeze temperatures is based on their effect on plants: Light freeze: 29° to 32°F (-1.7° to 0°C)—tender plants are killed. Moderate freeze: 25° to 28°F (-3.9° to -2.2°C)—widely destructive to most vegetation.

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A frost date is the average date of the last light freeze in spring or the first light freeze in fall.. The classification of freeze temperatures is based on their effect on plants: Light freeze: 29° to 32°F (-1.7° to 0°C)—tender plants are killed. Moderate freeze: 25° to 28°F (-3.9° to -2.2°C)—widely destructive to most vegetation. Severe freeze: 24°F (-4.4°C) and …Oct 22. Oct 24. Oct 26. Oct 29. Nov 1. Nov 5. Now that you know your frost dates, use our Garden Planting Calendar for Hampstead, North Carolina to know when to sow and transplant your various vegetable plants!Click Here to go to the interactive version of the Average First and Last Freeze Date. Click the radial buttons at the top to switch between First Frost and Last Freeze. Roll Over the Dots on the Map for Detailed Information. Click on the Stack of Lines in the Upper Right Corner to Save.See the average first and last frost dates for locations across the U.S. and Canada with our frost dates calculator. Simply enter your postal code to see when the last spring …A frost date is the average date of the last light freeze in spring or the first light freeze in fall. The classification of freeze temperatures is based on their effect on plants: Light freeze: 29° to 32°F (-1.7° to 0°C)—tender plants are killed. Moderate freeze: 25° to 28°F (-3.9° to -2.2°C)—widely destructive to most vegetation.A frost date is the average date of the last light freeze in spring or the first light freeze in fall. The classification of freeze temperatures is based on their effect on plants: Light freeze: 29° to 32°F (-1.7° to 0°C)—tender plants are killed. Moderate freeze: 25° to 28°F (-3.9° to -2.2°C)—widely destructive to most vegetation.You have a small 20% chance of getting 32° by November 6. There is a 50% chance of being hit by a 32° frost starting around November 18. You have a 80% chance of seeing 32° by November 29. Said another way, you have a 1 in 5 chance at making it to that day without a 32° night. In the Fall.A frost date is the average date of the last light freeze in spring or the first light freeze in fall. The classification of freeze temperatures is based on their effect on plants: Light freeze: 29° to 32°F (-1.7° to 0°C)—tender plants are killed. Moderate freeze: 25° to 28°F (-3.9° to -2.2°C)—widely destructive to most vegetation. ….

A frost date is the average date of the last light freeze in spring or the first light freeze in fall. The classification of freeze temperatures is based on their effect on plants: Light freeze: 29° to 32°F (-1.7° to 0°C)—tender plants are killed. Moderate freeze: 25° to 28°F (-3.9° to -2.2°C)—widely destructive to most vegetation. A frost date is the average date of the last light freeze in spring or the first light freeze in fall. The classification of freeze temperatures is based on their effect on plants: Light freeze: 29° to 32°F (-1.7° to 0°C)—tender plants are killed. Moderate freeze: 25° to 28°F (-3.9° to -2.2°C)—widely destructive to most vegetation.Weather Weather sub-navigation. 5-Day Forecast; Long-Range Forecast; SUMMER Forecast 2024; Frost Dates; Weather History; Gardening Gardening sub-navigation. Garden Planner; Planting Dates Chart; Robin's Garden BlogAverage Date of First Frost (fall) November 15. Lowest Expected Low. 15°F. Highest Expected Low. 20°F. This means that on a really cold year, the coldest it will get is 15°F . On most years you should be prepared to experience lows near 20°F . Below is a list of planting guides for Zone 8b.Oct 13. Oct 15. Oct 18. Oct 21. Oct 24. Now that you know your frost dates, use our Garden Planting Calendar for Lenoir, NC to know when to sow and transplant your various vegetable plants!A frost date is the average date of the last light freeze in spring or the first light freeze in fall. The classification of freeze temperatures is based on their effect on plants: Light freeze: 29° to 32°F (-1.7° to 0°C)—tender plants are killed. Moderate freeze: 25° to 28°F (-3.9° to -2.2°C)—widely destructive to most vegetation.First Frost Dates were calculated using daily climate data from the period between 1991-2020. Related Pages List of Average First Frost Dates for Locations in North CarolinaSep 13, 2023 ... Your average last frost date. The hardiness survival zone of the plant you want to grow. This knowledge enables you to sow all kinds of ...A frost date is the average date of the last light freeze in spring or the first light freeze in fall. The classification of freeze temperatures is based on their effect on plants: Light freeze: 29° to 32°F (-1.7° to 0°C)—tender plants are killed. Moderate freeze: 25° to 28°F (-3.9° to -2.2°C)—widely destructive to most vegetation.A frost date is the average date of the last light freeze in spring or the first light freeze in fall. The classification of freeze temperatures is based on their effect on plants: Light freeze: 29° to 32°F (-1.7° to 0°C)—tender plants are killed. Moderate freeze: 25° to 28°F (-3.9° to -2.2°C)—widely destructive to most vegetation. Nc last frost date 2023, A frost date is the average date of the last light freeze in spring or the first light freeze in fall. The classification of freeze temperatures is based on their effect on plants: Light freeze: 29° to 32°F (-1.7° to 0°C)—tender plants are killed. Moderate freeze: 25° to 28°F (-3.9° to -2.2°C)—widely destructive to most vegetation., A frost date is the average date of the last light freeze in spring or the first light freeze in fall. The classification of freeze temperatures is based on their effect on plants: Light freeze: 29° to 32°F (-1.7° to 0°C)—tender plants are killed. Moderate freeze: 25° to 28°F (-3.9° to -2.2°C)—widely destructive to most vegetation., A frost date is the average date of the last light freeze in spring or the first light freeze in fall. The classification of freeze temperatures is based on their effect on plants: Light freeze: 29° to 32°F (-1.7° to 0°C)—tender plants are killed. Moderate freeze: 25° to 28°F (-3.9° to -2.2°C)—widely destructive to most vegetation. , Here are the average last frost dates, average first frost dates, average days in the growing season, and USDA zone for several cities in the United States, Canada, and other parts of the world. United States. State and city Last frost First frost Days Zone. Alabama. Birmingham March 19 November 14 241 7B., A frost date is the average date of the last light freeze in spring or the first light freeze in fall. The classification of freeze temperatures is based on their effect on plants: Light freeze: 29° to 32°F (-1.7° to 0°C)—tender plants are killed. Moderate freeze: 25° to 28°F (-3.9° to -2.2°C)—widely destructive to most vegetation. , A frost date is the average date of the last light freeze in spring or the first light freeze in fall. The classification of freeze temperatures is based on their effect on plants: Light freeze: 29° to 32°F (-1.7° to 0°C)—tender plants are killed. Moderate freeze: 25° to 28°F (-3.9° to -2.2°C)—widely destructive to most vegetation., You have a small 20% chance of getting 32° by October 17. There is a 50% chance of being hit by a 32° frost starting around October 27. You have a 80% chance of seeing 32° by November 6. Said another way, you have a 1 in 5 chance at making it to that day without a 32° night. In the Fall. , A frost date is the average date of the last light freeze in spring or the first light freeze in fall. The classification of freeze temperatures is based on their effect on plants: Light freeze: 29° to 32°F (-1.7° to 0°C)—tender plants are killed. Moderate freeze: 25° to 28°F (-3.9° to -2.2°C)—widely destructive to most vegetation., climate.ncsu.edu Average Last Spring Freeze Dates in North Carolina Before Mar 11 Mar 26 to Apr 1 Apr 16 to Apr 22 Mar 12 to Mar 18 Apr 2 to Apr 8 Apr 23 to Apr 29 Mar 19 to Mar 25 Apr 9 to Apr 15 After Apr 30 Average Freeze Date., A frost date is the average date of the last light freeze in spring or the first light freeze in fall. The classification of freeze temperatures is based on their effect on plants: Light freeze: 29° to 32°F (-1.7° to 0°C)—tender plants are killed. Moderate freeze: 25° to 28°F (-3.9° to -2.2°C)—widely destructive to most vegetation., A frost date is the average date of the last light freeze in spring or the first light freeze in fall. The classification of freeze temperatures is based on their effect on plants: Light freeze: 29° to 32°F (-1.7° to 0°C)—tender plants are killed. Moderate freeze: 25° to 28°F (-3.9° to -2.2°C)—widely destructive to most vegetation. , A frost date is the average date of the last light freeze in spring or the first light freeze in fall.. The classification of freeze temperatures is based on their effect on plants: Light freeze: 29° to 32°F (-1.7° to 0°C)—tender plants are killed. Moderate freeze: 25° to 28°F (-3.9° to -2.2°C)—widely destructive to most vegetation. Severe freeze: 24°F (-4.4°C) and …, A frost date is the average date of the last light freeze in spring or the first light freeze in fall. The classification of freeze temperatures is based on their effect on plants: Light freeze: 29° to 32°F (-1.7° to 0°C)—tender plants are killed. Moderate freeze: 25° to 28°F (-3.9° to -2.2°C)—widely destructive to most vegetation., A frost date is the average date of the last light freeze in spring or the first light freeze in fall. The classification of freeze temperatures is based on their effect on plants: Light freeze: 29° to 32°F (-1.7° to 0°C)—tender plants are killed. Moderate freeze: 25° to 28°F (-3.9° to -2.2°C)—widely destructive to most vegetation., A frost date is the average date of the last light freeze in spring or the first light freeze in fall. The classification of freeze temperatures is based on their effect on plants: Light freeze: 29° to 32°F (-1.7° to 0°C)—tender plants are killed. Moderate freeze: 25° to 28°F (-3.9° to -2.2°C)—widely destructive to most vegetation., The average date of the last frost ranges from mid-April to early June. About half of the Northeast has passed the date of the average last frost. With the long ..., Our frost date calculator will tell you precisely when your garden in durham, nc is at risk for frost., First and Last Frost Dates. A "frost" date means when temperatures fall to 32°F or lower, which is cold enough to damage leaves or kill young, tender plants. In the most basic sense, your "growing season" is essentially the time between when the last freeze happens in spring (your last frost date) and the first time temps get to freezing later ..., A frost date is the average date of the last light freeze in spring or the first light freeze in fall. The classification of freeze temperatures is based on their effect on plants: Light freeze: 29° to 32°F (-1.7° to 0°C)—tender plants are killed. Moderate freeze: 25° to 28°F (-3.9° to -2.2°C)—widely destructive to most vegetation., A frost date is the average date of the last light freeze in spring or the first light freeze in fall. The classification of freeze temperatures is based on their effect on plants: Light freeze: 29° to 32°F (-1.7° to 0°C)—tender plants are killed. Moderate freeze: 25° to 28°F (-3.9° to -2.2°C)—widely destructive to most vegetation. , You have a small 20% chance of getting 32° by October 17. There is a 50% chance of being hit by a 32° frost starting around October 27. You have a 80% chance of seeing 32° by November 6. Said another way, you have a 1 in 5 chance at making it to that day without a 32° night. In the Fall. , A frost date is the average date of the last light freeze in spring or the first light freeze in fall. The classification of freeze temperatures is based on their effect on plants: Light freeze: 29° to 32°F (-1.7° to 0°C)—tender plants are killed. Moderate freeze: 25° to 28°F (-3.9° to -2.2°C)—widely destructive to most vegetation., You have a small 20% chance of getting 32° by September 25. There is a 50% chance of being hit by a 32° frost starting around October 4. You have a 80% chance of seeing 32° by October 13. Said another way, you have a 1 in 5 chance at making it to that day without a 32° night. In the Fall., Highlights. This map shows the average date past which the chances that the temperature will remain above freezing for the rest of the season are higher than the chances of return to freezing temperatures. On average, the last freeze of the season across most of the United States occurs after the first day of spring., Oct 13. Oct 15. Oct 18. Oct 21. Oct 24. Now that you know your frost dates, use our Garden Planting Calendar for Lenoir, NC to know when to sow and transplant your various vegetable plants!, Jun. 1 - Jun. 10. Zone 16. Jun. 11 - Jun. 20. Zone 17. Jun. 21 - Jun. 30. Plantmaps has derived zones indicating the average annual Last frost dates for United Kingdom., Average Date of First Frost (fall) November 15. Lowest Expected Low. 15°F. Highest Expected Low. 20°F. This means that on a really cold year, the coldest it will get is 15°F . On most years you should be prepared to experience lows near 20°F . Below is a list of planting guides for Zone 8b., A frost date is the average date of the last light freeze in spring or the first light freeze in fall. The classification of freeze temperatures is based on their effect on plants: Light freeze: 29° to 32°F (-1.7° to 0°C)—tender plants are killed. Moderate freeze: 25° to 28°F (-3.9° to -2.2°C)—widely destructive to most vegetation., A frost date is the average date of the last light freeze in spring or the first light freeze in fall. The classification of freeze temperatures is based on their effect on plants: Light freeze: 29° to 32°F (-1.7° to 0°C)—tender plants are killed. Moderate freeze: 25° to 28°F (-3.9° to -2.2°C)—widely destructive to most vegetation., A frost date is the average date of the last light freeze in spring or the first light freeze in fall. The classification of freeze temperatures is based on their effect on plants: Light freeze: 29° to 32°F (-1.7° to 0°C)—tender plants are killed. Moderate freeze: 25° to 28°F (-3.9° to -2.2°C)—widely destructive to most vegetation. , A frost date is the average date of the last light freeze in spring or the first light freeze in fall. The classification of freeze temperatures is based on their effect on plants: Light freeze: 29° to 32°F (-1.7° to 0°C)—tender plants are killed. Moderate freeze: 25° to 28°F (-3.9° to -2.2°C)—widely destructive to most vegetation., Here are the average last frost dates, average first frost dates, average days in the growing season, and USDA zone for several cities in the United States, Canada, and other parts of the world. United States. State and city Last frost First frost Days Zone. Alabama. Birmingham March 19 November 14 241 7B., The average depth of the frost line in Iowa is 58 inches. In the northern part of the state, the frost line can be up to 70 inches deep, while in the southern part the line may be ...