Frost dates in Huntsville, Alabama
NOAA 1991–2020 normals for a 32 °F freeze. Low spots and the edge of town run colder than downtown.
Short answer
The average last spring frost in Huntsville is March 24, and the average first fall frost is November 8, from NOAA's Huntsville Intl Airport station, 7 miles from the middle of Huntsville. 1 year in 10 the last frost comes after April 8, and the first one by October 27. That leaves about 229 frost-free days. Huntsville is in USDA planting zone 8a.
Weather stations around Huntsville
The first row is the date most people in Huntsville go by. The others show how far the dates move across the area.
| Station | Last spring frost | First fall frost | Frost-free |
|---|---|---|---|
| Huntsville Intl Airport 7 mi away, 624 ft | March 24 1 in 10 after April 8 | November 8 1 in 10 by October 27 | 229 days |
| Belle Mina 2 N 12 mi away, 603 ft | March 31 1 in 10 after April 16 | November 1 1 in 10 by October 19 | 215 days |
| Decatur Pryor Fld 16 mi away, 592 ft | March 27 1 in 10 after April 10 | November 3 1 in 10 by October 22 | 221 days |
| Athens 16 mi away, 689 ft | March 20 1 in 10 after April 7 | November 12 1 in 10 by November 1 | 237 days |
| Owens Cross Roads 3S 17 mi away, 590 ft | April 4 1 in 10 after April 20 | October 30 1 in 10 by October 17 | 209 days |
Distances are from the middle of Huntsville as the Census Bureau maps it. The average date is NOAA's 50% date: half of years have a later last frost, or an earlier first one. Plan by the 1-in-10 date if a freeze would cost you plants. The planting zone is the USDA 2023 zone for ZIP code 35805, at the middle of the city.
Your exact ZIP code
Huntsville covers a lot of ground. For the station nearest your own street, and its planting zone, type your ZIP code.
How these dates work
Frost dates come from NOAA's 1991 to 2020 Climate Normals, which work out from each weather station's daily lows how likely the last spring freeze and the first fall freeze (32 °F) are by each date. We use the station nearest the middle of your ZIP code and show its height and distance, since a station on a hill or by a lake can differ from your yard.
The average date is the 50% date: half of years have a freeze after the spring date or before the fall one. The 1-in-10 dates are NOAA's 10% dates, the ones to plan by if a late freeze would cost you plants. Within one yard, cold air pools in low spots while walls and paving hold heat, so some corners freeze before others.
More frost dates
All of Alabama, station by station.
Other Alabama cities: Mobile · Birmingham · Montgomery
Nearby: Murfreesboro, TN · Chattanooga, TN · Nashville, TN
Where the numbers come from
- USDA Plant Hardiness Zone Map, 2023. Agricultural Research Service, U.S. Department of Agriculture
- PRISM Climate Group, Oregon State University (zone data)
- NOAA NCEI, U.S. Climate Normals 1991–2020, annual/seasonal
- NOAA, Normals calculation methodology (frost-freeze probability dates)
- US Census Bureau, 2025 ZCTA gazetteer (ZIP code centers)
- US Census Bureau, 2025 city population estimates and place gazetteer