Last spring frost
Mar 3
Frost Dates for Mobile, AL
First fall frost
Nov 25
Growing season
268 days
Hardiness zone
9a
In an average year around Mobile, AL, the last spring frost (32°F) is about Mar 3 and the first fall frost is about Nov 25, giving roughly a 268-day growing season. To be safe most years, wait until Feb 6 before setting out tender plants.
Last spring frost
Dates the last frost of spring typically ends. Plant tender crops after the risk has passed for your comfort level.
| Frost intensity | Early (10%) | Average (50%) | Late (90%) |
|---|---|---|---|
| Light (36°F) | Apr 5 | Mar 17 | Feb 26 |
| Freeze (32°F) | Mar 21 | Mar 3 | Feb 6 |
| Hard (28°F) | Mar 13 | Feb 13 | Jan 17 |
| Severe (24°F) | Mar 2 | Jan 30 | Dec 31 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Apr 5 | Mar 30 | Mar 25 | Mar 20 | Mar 17 | Mar 14 | Mar 10 | Mar 5 | Feb 26 |
| 32°F | Mar 21 | Mar 16 | Mar 12 | Mar 8 | Mar 3 | Feb 27 | Feb 22 | Feb 15 | Feb 6 |
| 28°F | Mar 13 | Mar 6 | Feb 28 | Feb 21 | Feb 13 | Feb 6 | Feb 2 | Jan 28 | Jan 17 |
| 24°F | Mar 2 | Feb 19 | Feb 9 | Feb 2 | Jan 30 | Jan 25 | Jan 18 | Jan 12 | Dec 31 |
| 20°F | Feb 19 | Feb 5 | Jan 31 | Jan 26 | Jan 20 | Jan 16 | Jan 10 | Jan 5 | Dec 28 |
| 16°F | Feb 8 | Feb 3 | Jan 29 | Jan 24 | Jan 18 | Jan 13 | Jan 9 | Jan 6 | Jan 2 |
First fall frost
Dates the first frost of fall typically arrives. Count back by a crop's days-to-maturity to know your planting cutoff.
| Frost intensity | Early (10%) | Average (50%) | Late (90%) |
|---|---|---|---|
| Light (36°F) | Oct 30 | Nov 13 | Dec 4 |
| Freeze (32°F) | Nov 8 | Nov 25 | Dec 22 |
| Hard (28°F) | Nov 17 | Dec 14 | Jan 17 |
| Severe (24°F) | Dec 4 | Jan 3 | Feb 3 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Oct 30 | Nov 3 | Nov 6 | Nov 10 | Nov 13 | Nov 16 | Nov 20 | Nov 26 | Dec 4 |
| 32°F | Nov 8 | Nov 13 | Nov 17 | Nov 21 | Nov 25 | Dec 1 | Dec 4 | Dec 10 | Dec 22 |
| 28°F | Nov 17 | Nov 26 | Dec 2 | Dec 7 | Dec 14 | Dec 24 | Jan 1 | Jan 7 | Jan 17 |
| 24°F | Dec 4 | Dec 13 | Dec 23 | Dec 30 | Jan 3 | Jan 8 | Jan 14 | Jan 21 | Feb 3 |
| 20°F | Dec 22 | Dec 31 | Jan 3 | Jan 7 | Jan 10 | Jan 16 | Jan 20 | Jan 27 | Feb 4 |
| 16°F | Jan 2 | Jan 5 | Jan 7 | Jan 11 | Jan 17 | Jan 20 | Jan 28 | Feb 1 | Feb 6 |
Growing season is measured at 32°F with about 50% probability. Hardiness zone from the 2023 USDA map; frost normals from NOAA 1991-2020.
Where this data comes from
@endif These dates are computed from the nearest official weather station with long-term records: Mobile, Al, about 3.6 miles away@if(!empty($station['elevation_ft'])), at 208 ft elevation. The further the station and the greater the elevation difference from your yard, the more your local frost timing can vary.
How we calculate these dates
Frost and freeze dates come from the NOAA 1991–2020 U.S. Climate Normals, the National Oceanic and Atmospheric Administration's 30-year averages for each weather station. A date shown at the 50% level is the median: in half of years the frost falls on or before it. The 10% and 90% columns show the early and late ends of the range, so you can plant on the odds you're comfortable with. These are long-term averages, not a forecast for this year - always check your local outlook before planting.
Source: NOAA National Centers for Environmental Information, 1991–2020 Climate Normals (public domain). Harman is not affiliated with or endorsed by NOAA.
Frequently asked questions
When is the last frost in Mobile, AL?
On average, the last spring frost (32°F) around Mobile, AL is about Mar 3. In cooler years it can run later, so for a safer bet many gardeners wait until Feb 6.
When is the first frost in the fall?
The first fall frost around Mobile, AL typically arrives about Nov 25. Count back by a crop's days to maturity to find the latest date you can plant it.
When can I plant tomatoes and other tender crops?
Tender crops like tomatoes, peppers and basil are damaged by frost, so wait until the last spring frost has passed - around Mar 3 on average, or Feb 6 to be safe most years.
How long is the growing season here?
The frost-free growing season (between the last spring and first fall 32°F frost) is about 268 days in a typical year.
Are these dates a forecast for this year?
No. They are 30-year averages from the NOAA 1991–2020 Climate Normals, not a prediction for the current year. Use them for planning and always check your local weather forecast before planting or protecting crops.
Local weather for 36608 Planting calendar → Alabama frost dates →
Data source: NOAA 1991–2020 Climate Normals · Page updated Aug 4, 2026