Frost dates for Mobile Dwtn Airport, AL
At Mobile Dwtn Airport, the median last spring frost (32°F) is Feb 21 and the median first fall frost is Dec 6, for a typical growing season of 292 days. For a 90% chance that the last frost has passed, wait until Mar 15. Nearby ZIP codes are in USDA hardiness zones 8b to 9a.
- Feb 21Last spring frost (median)50% chance of 32°F after this date
- Mar 15Safer planting date10% chance of 32°F after this date
- Dec 6First fall frost (median)50% chance of 32°F by this date
- 292 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 12 | Mar 6 | Mar 25 |
| 32°F | Jan 25 | Feb 21 | Mar 15 |
| 28°F | Jan 2 | Feb 2 | Mar 6 |
| 24°F | Dec 27 | Jan 22 | Feb 23 |
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 | Nov 5 | Nov 22 | Dec 13 |
| 32°F | Nov 15 | Dec 6 | Jan 5 |
| 28°F | Nov 30 | Dec 30 | Jan 30 |
| 24°F | Dec 14 | Jan 9 | Feb 6 |
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 | 236 days | 264 days | 294 days |
| 32°F | 257 days | 292 days | 326 days |
| 28°F | 288 days | 326 days | 361 days |
| 24°F | 317 days | 359 days | 365 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 89% |
| 24°F | 59% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 36615 | 9a | 20 to 25°F | 0 km |
| 36605 | 9a | 20 to 25°F | 3 km |
| 36606 | 9a | 20 to 25°F | 6 km |
| 36604 | 9a | 20 to 25°F | 6 km |
| 36603 | 9a | 20 to 25°F | 7 km |
| 36693 | 9a | 20 to 25°F | 8 km |
| 36652 | 9a | 20 to 25°F | 8 km |
| 36602 | 9a | 20 to 25°F | 8 km |
| 36607 | 9a | 20 to 25°F | 9 km |
| 36617 | 9a | 20 to 25°F | 10 km |
| 36610 | 9a | 20 to 25°F | 12 km |
| 36663 | 9a | 20 to 25°F | 13 km |
| 36611 | 9a | 20 to 25°F | 16 km |
| 36572 | 8b | 15 to 20°F | 26 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 USW00013838, at 30.6264, -88.0681, elevation 8 m (26 ft).
- Data quality: Standard (24+ years of data), 24 years of freeze data.
- Average days per year at or below 32°F: 15.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Mobile (17 km)
- Fairhope 2 NE (20 km)
- Fairhope 3 NE (20 km)
- Coden (31 km)
- Robertsdale (36 km)
- Bay Minette (39 km)
- Dauphin Island #2 (42 km)
- Atmore (86 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.