Last spring frost
Mar 21
Frost Dates for Knoxville, GA
First fall frost
Nov 10
Growing season
235 days
Hardiness zone
8b
In an average year around Knoxville, GA, the last spring frost (32°F) is about Mar 21 and the first fall frost is about Nov 10, giving roughly a 235-day growing season. To be safe most years, wait until Feb 28 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 19 | Apr 3 | Mar 17 |
| Freeze (32°F) | Apr 7 | Mar 21 | Feb 28 |
| Hard (28°F) | Mar 24 | Mar 3 | Feb 5 |
| Severe (24°F) | Mar 12 | Feb 14 | Jan 18 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Apr 19 | Apr 14 | Apr 10 | Apr 7 | Apr 3 | Apr 1 | Mar 28 | Mar 23 | Mar 17 |
| 32°F | Apr 7 | Apr 2 | Mar 29 | Mar 25 | Mar 21 | Mar 18 | Mar 13 | Mar 8 | Feb 28 |
| 28°F | Mar 24 | Mar 18 | Mar 13 | Mar 7 | Mar 3 | Feb 28 | Feb 22 | Feb 15 | Feb 5 |
| 24°F | Mar 12 | Mar 2 | Feb 25 | Feb 19 | Feb 14 | Feb 7 | Feb 1 | Jan 27 | Jan 18 |
| 20°F | Feb 23 | Feb 11 | Feb 6 | Feb 1 | Jan 29 | Jan 24 | Jan 18 | Jan 9 | Dec 30 |
| 16°F | Feb 8 | Feb 2 | Jan 30 | Jan 26 | Jan 22 | Jan 17 | Jan 12 | Jan 6 | Dec 26 |
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 13 |
| Freeze (32°F) | Oct 29 | Nov 10 | Nov 29 |
| Hard (28°F) | Nov 6 | Nov 24 | Dec 21 |
| Severe (24°F) | Nov 18 | Dec 15 | Jan 14 |
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 29 | Nov 1 | Nov 2 | Nov 5 | Nov 8 | Nov 13 |
| 32°F | Oct 29 | Nov 1 | Nov 4 | Nov 7 | Nov 10 | Nov 14 | Nov 17 | Nov 21 | Nov 29 |
| 28°F | Nov 6 | Nov 11 | Nov 16 | Nov 20 | Nov 24 | Nov 29 | Dec 3 | Dec 8 | Dec 21 |
| 24°F | Nov 18 | Nov 26 | Dec 2 | Dec 7 | Dec 15 | Dec 24 | Dec 31 | Jan 5 | Jan 14 |
| 20°F | Dec 3 | Dec 12 | Dec 24 | Dec 31 | Jan 4 | Jan 9 | Jan 15 | Jan 22 | Feb 2 |
| 16°F | Dec 23 | Jan 1 | Jan 6 | Jan 11 | Jan 16 | Jan 20 | Jan 25 | Jan 30 | 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: Macon Middle Ga Rgnl Ap, Ga, about 16.7 miles away@if(!empty($station['elevation_ft'])), at 343 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 Knoxville, GA?
On average, the last spring frost (32°F) around Knoxville, GA is about Mar 21. In cooler years it can run later, so for a safer bet many gardeners wait until Feb 28.
When is the first frost in the fall?
The first fall frost around Knoxville, GA typically arrives about Nov 10. 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 21 on average, or Feb 28 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 235 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 31050 Planting calendar → Georgia frost dates →
Data source: NOAA 1991–2020 Climate Normals · Page updated Aug 4, 2026