Frost dates in Mobile, 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 Mobile is February 21, and the average first fall frost is December 6, from NOAA's Mobile Dwtn Airport station, 4 miles from the middle of Mobile. 1 year in 10 the last frost comes after March 15, and the first one by November 15. That leaves about 288 frost-free days. Mobile is in USDA planting zone 9a.
Weather stations around Mobile
The first row is the date most people in Mobile go by. The others show how far the dates move across the area.
| Station | Last spring frost | First fall frost | Frost-free |
|---|---|---|---|
| Mobile Dwtn Airport 4 mi away, 26 ft | February 21 1 in 10 after March 15 | December 6 1 in 10 by November 15 | 288 days |
| Mobile 8 mi away, 208 ft | March 3 1 in 10 after March 21 | November 25 1 in 10 by November 8 | 267 days |
| Fairhope 2 NE 16 mi away, 23 ft | March 10 1 in 10 after March 30 | November 17 1 in 10 by November 2 | 252 days |
| Fairhope 3 NE 16 mi away, 95 ft | March 15 1 in 10 after April 2 | November 19 1 in 10 by November 2 | 249 days |
| Coden 21 mi away, 12 ft | March 13 1 in 10 after April 2 | November 24 1 in 10 by November 4 | 256 days |
Distances are from the middle of Mobile 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 36606, at the middle of the city.
Your exact ZIP code
Mobile 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: Huntsville · Birmingham · Montgomery
Nearby: New Orleans, LA · Baton Rouge, LA
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