Last spring frost
Apr 6
Frost Dates for Heflin, AL
First fall frost
Oct 31
Growing season
206 days
Hardiness zone
8a
In an average year around Heflin, AL, the last spring frost (32°F) is about Apr 6 and the first fall frost is about Oct 31, giving roughly a 206-day growing season. To be safe most years, wait until Mar 20 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) | May 4 | Apr 20 | Apr 4 |
| Freeze (32°F) | Apr 22 | Apr 6 | Mar 20 |
| Hard (28°F) | Apr 10 | Mar 25 | Mar 2 |
| Severe (24°F) | Mar 31 | Mar 11 | Feb 14 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | May 4 | Apr 30 | Apr 26 | Apr 23 | Apr 20 | Apr 17 | Apr 13 | Apr 9 | Apr 4 |
| 32°F | Apr 22 | Apr 17 | Apr 13 | Apr 9 | Apr 6 | Apr 3 | Mar 31 | Mar 27 | Mar 20 |
| 28°F | Apr 10 | Apr 6 | Apr 2 | Mar 30 | Mar 25 | Mar 22 | Mar 18 | Mar 13 | Mar 2 |
| 24°F | Mar 31 | Mar 25 | Mar 20 | Mar 15 | Mar 11 | Mar 6 | Feb 28 | Feb 23 | Feb 14 |
| 20°F | Mar 19 | Mar 11 | Mar 4 | Feb 28 | Feb 23 | Feb 17 | Feb 10 | Feb 3 | Jan 26 |
| 16°F | Mar 5 | Feb 26 | Feb 18 | Feb 10 | Feb 4 | Jan 31 | Jan 26 | Jan 19 | Jan 8 |
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 9 | Oct 22 | Nov 2 |
| Freeze (32°F) | Oct 19 | Oct 31 | Nov 12 |
| Hard (28°F) | Oct 27 | Nov 9 | Nov 28 |
| Severe (24°F) | Nov 5 | Nov 22 | Dec 14 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Oct 9 | Oct 14 | Oct 17 | Oct 19 | Oct 22 | Oct 24 | Oct 27 | Oct 30 | Nov 2 |
| 32°F | Oct 19 | Oct 23 | Oct 25 | Oct 29 | Oct 31 | Nov 2 | Nov 5 | Nov 8 | Nov 12 |
| 28°F | Oct 27 | Nov 1 | Nov 4 | Nov 6 | Nov 9 | Nov 12 | Nov 15 | Nov 20 | Nov 28 |
| 24°F | Nov 5 | Nov 9 | Nov 14 | Nov 17 | Nov 22 | Nov 26 | Dec 1 | Dec 6 | Dec 14 |
| 20°F | Nov 16 | Nov 24 | Nov 30 | Dec 4 | Dec 8 | Dec 15 | Dec 24 | Jan 1 | Jan 7 |
| 16°F | Dec 1 | Dec 6 | Dec 16 | Dec 25 | Jan 1 | Jan 4 | Jan 9 | Jan 17 | Jan 29 |
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: Heflin, Al, about 4.6 miles away@if(!empty($station['elevation_ft'])), at 1,000 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 Heflin, AL?
On average, the last spring frost (32°F) around Heflin, AL is about Apr 6. In cooler years it can run later, so for a safer bet many gardeners wait until Mar 20.
When is the first frost in the fall?
The first fall frost around Heflin, AL typically arrives about Oct 31. 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 Apr 6 on average, or Mar 20 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 206 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 36264 Planting calendar → Alabama frost dates →
Data source: NOAA 1991–2020 Climate Normals · Page updated Aug 4, 2026