Last spring frost
Mar 6
Frost Dates for Iron City, GA
First fall frost
Nov 23
Growing season
264 days
Hardiness zone
9a
In an average year around Iron City, GA, the last spring frost (32°F) is about Mar 6 and the first fall frost is about Nov 23, giving roughly a 264-day growing season. To be safe most years, wait until Feb 10 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 20 | Feb 27 |
| Freeze (32°F) | Mar 25 | Mar 6 | Feb 10 |
| Hard (28°F) | Mar 15 | Feb 17 | Jan 22 |
| Severe (24°F) | Mar 1 | Jan 30 | Jan 1 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Apr 5 | Mar 31 | Mar 27 | Mar 24 | Mar 20 | Mar 16 | Mar 11 | Mar 6 | Feb 27 |
| 32°F | Mar 25 | Mar 19 | Mar 14 | Mar 11 | Mar 6 | Mar 2 | Feb 25 | Feb 19 | Feb 10 |
| 28°F | Mar 15 | Mar 7 | Mar 1 | Feb 25 | Feb 17 | Feb 10 | Feb 4 | Jan 31 | Jan 22 |
| 24°F | Mar 1 | Feb 18 | Feb 8 | Feb 2 | Jan 30 | Jan 26 | Jan 20 | Jan 12 | Jan 1 |
| 20°F | Feb 16 | Feb 5 | Jan 31 | Jan 27 | Jan 22 | Jan 16 | Jan 11 | Jan 6 | Dec 30 |
| 16°F | Feb 7 | Feb 2 | Jan 29 | Jan 25 | Jan 19 | Jan 15 | Jan 12 | Jan 8 | 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 11 | Nov 29 |
| Freeze (32°F) | Nov 6 | Nov 23 | Dec 22 |
| Hard (28°F) | Nov 17 | Dec 12 | Jan 14 |
| Severe (24°F) | Dec 1 | Jan 2 | Feb 1 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Oct 30 | Nov 3 | Nov 5 | Nov 8 | Nov 11 | Nov 15 | Nov 18 | Nov 22 | Nov 29 |
| 32°F | Nov 6 | Nov 12 | Nov 15 | Nov 19 | Nov 23 | Nov 27 | Dec 1 | Dec 7 | Dec 22 |
| 28°F | Nov 17 | Nov 24 | Nov 30 | Dec 4 | Dec 12 | Dec 22 | Dec 31 | Jan 4 | Jan 14 |
| 24°F | Dec 1 | Dec 9 | Dec 21 | Dec 30 | Jan 2 | Jan 8 | Jan 13 | Jan 21 | Feb 1 |
| 20°F | Dec 15 | Dec 30 | Jan 3 | Jan 8 | Jan 13 | Jan 18 | Jan 23 | Jan 29 | Feb 5 |
| 16°F | Jan 1 | Jan 6 | Jan 11 | Jan 13 | Jan 16 | Jan 24 | Jan 27 | 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: Donalsonville, Ga, about 5.4 miles away@if(!empty($station['elevation_ft'])), at 150 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 Iron City, GA?
On average, the last spring frost (32°F) around Iron City, GA is about Mar 6. In cooler years it can run later, so for a safer bet many gardeners wait until Feb 10.
When is the first frost in the fall?
The first fall frost around Iron City, GA typically arrives about Nov 23. 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 6 on average, or Feb 10 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 264 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 39859 Planting calendar → Georgia frost dates →
Data source: NOAA 1991–2020 Climate Normals · Page updated Aug 4, 2026