Last spring frost
Mar 23
Frost Dates for Thomaston, GA
First fall frost
Nov 12
Growing season
234 days
Hardiness zone
8b
In an average year around Thomaston, GA, the last spring frost (32°F) is about Mar 23 and the first fall frost is about Nov 12, giving roughly a 234-day growing season. To be safe most years, wait until Mar 1 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 20 | Apr 5 | Mar 19 |
| Freeze (32°F) | Apr 11 | Mar 23 | Mar 1 |
| Hard (28°F) | Mar 29 | Mar 10 | Feb 14 |
| Severe (24°F) | Mar 17 | Feb 24 | Jan 24 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Apr 20 | Apr 15 | Apr 11 | Apr 8 | Apr 5 | Apr 3 | Mar 30 | Mar 26 | Mar 19 |
| 32°F | Apr 11 | Apr 4 | Mar 31 | Mar 27 | Mar 23 | Mar 19 | Mar 15 | Mar 11 | Mar 1 |
| 28°F | Mar 29 | Mar 22 | Mar 17 | Mar 14 | Mar 10 | Mar 5 | Feb 28 | Feb 24 | Feb 14 |
| 24°F | Mar 17 | Mar 11 | Mar 5 | Feb 28 | Feb 24 | Feb 17 | Feb 10 | Feb 1 | Jan 24 |
| 20°F | Mar 5 | Feb 27 | Feb 17 | Feb 10 | Feb 3 | Jan 30 | Jan 23 | Jan 16 | Jan 5 |
| 16°F | Feb 19 | Feb 8 | Jan 31 | Jan 27 | Jan 22 | Jan 17 | Jan 11 | Jan 4 | Dec 29 |
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 20 | Nov 1 | Nov 16 |
| Freeze (32°F) | Oct 31 | Nov 12 | Nov 28 |
| Hard (28°F) | Nov 7 | Nov 26 | Dec 18 |
| Severe (24°F) | Nov 24 | Dec 13 | Jan 8 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Oct 20 | Oct 24 | Oct 27 | Oct 30 | Nov 1 | Nov 3 | Nov 6 | Nov 9 | Nov 16 |
| 32°F | Oct 31 | Nov 3 | Nov 5 | Nov 8 | Nov 12 | Nov 15 | Nov 18 | Nov 22 | Nov 28 |
| 28°F | Nov 7 | Nov 13 | Nov 17 | Nov 22 | Nov 26 | Dec 1 | Dec 3 | Dec 8 | Dec 18 |
| 24°F | Nov 24 | Dec 1 | Dec 4 | Dec 8 | Dec 13 | Dec 20 | Dec 26 | Jan 1 | Jan 8 |
| 20°F | Dec 7 | Dec 13 | Dec 21 | Dec 28 | Jan 1 | Jan 4 | Jan 9 | Jan 17 | Jan 30 |
| 16°F | Dec 15 | Dec 24 | Dec 31 | Jan 3 | Jan 7 | Jan 13 | Jan 19 | Jan 25 | Feb 2 |
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: Thomaston 4Se, Ga, about 4.1 miles away@if(!empty($station['elevation_ft'])), at 620 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 Thomaston, GA?
On average, the last spring frost (32°F) around Thomaston, GA is about Mar 23. In cooler years it can run later, so for a safer bet many gardeners wait until Mar 1.
When is the first frost in the fall?
The first fall frost around Thomaston, GA typically arrives about Nov 12. 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 23 on average, or Mar 1 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 234 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 30286 Planting calendar → Georgia frost dates →
Data source: NOAA 1991–2020 Climate Normals · Page updated Aug 4, 2026