Frost Dates for Mobile, AL
In Mobile, AL, the average last spring frost is around Feb 21 and the average first fall frost around Dec 6, for a growing season of about 292 days. For frost-tender plants, wait until Mar 15, when the chance of frost drops to 10%.
Based on NOAA 1991–2020 records from the Mobile Dwtn Airport, AL weather station, 4 miles away, elevation 26 ft. Frost can come earlier in low spots and valleys and later near cities and large lakes.
Frost probability by date
Chance of a 32°F frost after the spring date, or before the fall date.
| Chance | Last spring frost | First fall frost |
|---|---|---|
| 10% | Mar 15 | Nov 15 |
| 20% | Mar 9 | Nov 22 |
| 30% | Mar 3 | Nov 28 |
| 40% | Feb 27 | Dec 1 |
| 50% | Feb 21 | Dec 6 |
| 60% | Feb 15 | Dec 12 |
| 70% | Feb 9 | Dec 19 |
| 80% | Feb 2 | Dec 28 |
| 90% | Jan 25 | Jan 5 |
Light frost vs. hard freeze
Average (50%) dates for each temperature. Tender plants are damaged at 36°F; most hardy crops survive until 28°F.
| Temperature | Last in spring | First in fall |
|---|---|---|
| Light frost (36°F) | Mar 6 | Nov 22 |
| Frost / freeze (32°F) | Feb 21 | Dec 6 |
| Hard freeze (28°F) | Feb 2 | Dec 30 |
Planting calendar for Mobile
Transplant Feb 28 – Mar 14
Transplant Mar 7 – Mar 21
Transplant Mar 7 – Mar 21
Transplant Feb 28 – Mar 14
Sow or transplant Feb 28 – Mar 14
Sow or transplant Feb 28 – Mar 14
Sow or transplant Mar 7 – Mar 21
Sow or transplant Jan 24 – Feb 7
Fall sowing Oct 11 – Nov 8
Fall sowing Oct 11 – Nov 1
Fall sowing Sep 27 – Oct 11
Sow or transplant Jan 24 – Feb 7
Fall sowing Sep 27 – Oct 25
Transplant Feb 7 – Feb 21
Fall sowing Sep 13 – Sep 27
Transplant Jan 31 – Feb 14
Fall sowing Sep 13 – Sep 27
Fall sowing Sep 13 – Sep 27
Fall sowing Oct 25 – Nov 15
Fall sowing Sep 27 – Oct 11
Plant Jan 24 – Feb 7
Based on the average last frost (Feb 21) and first frost (Dec 6). The dashed lines mark those dates. Seed packets list days to maturity; adjust for your varieties.