Frost dates for Mobile, AL
At Mobile, the median last spring frost (32°F) is Mar 3 and the median first fall frost is Nov 25, for a typical growing season of 268 days. For a 90% chance that the last frost has passed, wait until Mar 21. Nearby ZIP codes are in USDA hardiness zones 8b to 9a.
- Mar 3Last spring frost (median)50% chance of 32°F after this date
- Mar 21Safer planting date10% chance of 32°F after this date
- Nov 25First fall frost (median)50% chance of 32°F by this date
- 268 daysGrowing season (median)between 32°F freezes
Last spring frost dates
The chance that the temperature drops to the threshold after each date.
| Temperature | 90% chance later | 50% chance later | 10% chance later |
|---|---|---|---|
| 36°F | Feb 26 | Mar 17 | Apr 5 |
| 32°F | Feb 6 | Mar 3 | Mar 21 |
| 28°F | Jan 17 | Feb 13 | Mar 13 |
| 24°F | Dec 31 | Jan 30 | Mar 2 |
First fall frost dates
The chance that the temperature has dropped to the threshold by each date.
| Temperature | 10% chance by | 50% chance by | 90% chance by |
|---|---|---|---|
| 36°F | Oct 30 | Nov 13 | Dec 4 |
| 32°F | Nov 8 | Nov 25 | Dec 22 |
| 28°F | Nov 17 | Dec 14 | Jan 17 |
| 24°F | Dec 4 | Jan 3 | Feb 3 |
Growing season length
Days between the last spring and first fall freeze, as the length reached in 9, 5 and 1 out of 10 years.
| Temperature | 9 in 10 years at least | 5 in 10 years at least | 1 in 10 years at least |
|---|---|---|---|
| 36°F | 216 days | 242 days | 268 days |
| 32°F | 242 days | 268 days | 300 days |
| 28°F | 265 days | 303 days | 337 days |
| 24°F | 297 days | 335 days | 365 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 99% |
| 24°F | 81% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 36688 | 9a | 20 to 25°F | 5 km |
| 36608 | 9a | 20 to 25°F | 6 km |
| 36695 | 9a | 20 to 25°F | 7 km |
| 36609 | 9a | 20 to 25°F | 8 km |
| 36618 | 9a | 20 to 25°F | 9 km |
| 36619 | 9a | 20 to 25°F | 10 km |
| 36575 | 9a | 20 to 25°F | 10 km |
| 36612 | 9a | 20 to 25°F | 15 km |
| 36613 | 9a | 20 to 25°F | 15 km |
| 36587 | 9a | 20 to 25°F | 20 km |
| 36571 | 9a | 20 to 25°F | 23 km |
| 36521 | 8b | 15 to 20°F | 32 km |
| 39452 | 8b | 15 to 20°F | 41 km |
Not the official USDA Plant Hardiness Zone Map. Zones shown here are the values published in the USDA-ARS / Oregon State University PRISM Group 2023 ZIP code tables, shown unaltered. For the official interactive map, visit planthardiness.ars.usda.gov.
About this station
- NOAA station ID USW00013894, at 30.6794, -88.2397, elevation 63 m (208 ft).
- Data quality: Standard (24+ years of data), 30 years of freeze data.
- Average days per year at or below 32°F: 21.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Mobile Dwtn Airport (17 km)
- Coden (32 km)
- Fairhope 2 NE (37 km)
- Fairhope 3 NE (38 km)
- Bay Minette (49 km)
- Dauphin Island #2 (50 km)
- Robertsdale (53 km)
- Chatom (88 km)
Sources
- NOAA National Centers for Environmental Information, U.S. Climate Normals 1991–2020, annual/seasonal normals by station (version 1.0.1), file dated June 27, 2023; documentation.
- USDA Agricultural Research Service and PRISM Group, Oregon State University, 2023 Plant Hardiness Zone Map ZIP code tables (CONUS, Alaska, Hawaii, Puerto Rico), files dated November 17, 2023. Data © PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed November 1, 2026. Official map: planthardiness.ars.usda.gov.
- U.S. Census Bureau, 2024 Gazetteer ZIP Code Tabulation Areas file, dated August 30, 2024 (ZIP centroids used to find the nearest station).
Freeze dates are 30-year probabilities, not forecasts. Check your local forecast before planting tender plants.