Last spring frost
Feb 4
Frost Dates for Charleston, SC
First fall frost
Dec 30
Growing season
321 days
In an average year around Charleston, SC, the last spring frost (32°F) is about Feb 4 and the first fall frost is about Dec 30, giving roughly a 321-day growing season. To be safe most years, wait until Jan 5 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) | Mar 17 | Feb 25 | Jan 29 |
| Freeze (32°F) | Mar 4 | Feb 4 | Jan 5 |
| Hard (28°F) | Feb 20 | Jan 24 | Dec 27 |
| Severe (24°F) | Feb 10 | Jan 18 | Dec 30 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Mar 17 | Mar 11 | Mar 6 | Mar 2 | Feb 25 | Feb 20 | Feb 13 | Feb 6 | Jan 29 |
| 32°F | Mar 4 | Feb 25 | Feb 17 | Feb 10 | Feb 4 | Jan 30 | Jan 24 | Jan 16 | Jan 5 |
| 28°F | Feb 20 | Feb 9 | Feb 1 | Jan 28 | Jan 24 | Jan 15 | Jan 10 | Jan 4 | Dec 27 |
| 24°F | Feb 10 | Feb 1 | Jan 28 | Jan 24 | Jan 18 | Jan 14 | Jan 9 | Jan 3 | Dec 30 |
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) | Nov 20 | Dec 10 | Jan 7 |
| Freeze (32°F) | Dec 2 | Dec 30 | Jan 25 |
| Hard (28°F) | Dec 15 | Jan 8 | Feb 3 |
| Severe (24°F) | Dec 22 | Jan 15 | Feb 2 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Nov 20 | Nov 26 | Dec 1 | Dec 6 | Dec 10 | Dec 17 | Dec 23 | Dec 29 | Jan 7 |
| 32°F | Dec 2 | Dec 10 | Dec 20 | Dec 25 | Dec 30 | Jan 3 | Jan 9 | Jan 15 | Jan 25 |
| 28°F | Dec 15 | Dec 23 | Dec 30 | Jan 3 | Jan 8 | Jan 13 | Jan 18 | Jan 26 | Feb 3 |
| 24°F | Dec 22 | Jan 1 | Jan 6 | Jan 10 | Jan 15 | Jan 19 | Jan 23 | Jan 28 | 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: Charleston City, Sc, about 2 miles away@if(!empty($station['elevation_ft'])), at 10 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 Charleston, SC?
On average, the last spring frost (32°F) around Charleston, SC is about Feb 4. In cooler years it can run later, so for a safer bet many gardeners wait until Jan 5.
When is the first frost in the fall?
The first fall frost around Charleston, SC typically arrives about Dec 30. 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 Feb 4 on average, or Jan 5 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 321 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 29409 Planting calendar → South Carolina frost dates →
Data source: NOAA 1991–2020 Climate Normals · Page updated Aug 4, 2026