Frost dates for Clemson Univ, SC
At Clemson Univ, the median last spring frost (32°F) is Apr 1 and the median first fall frost is Nov 3, for a typical growing season of 217 days. For a 90% chance that the last frost has passed, wait until Apr 18. Nearby ZIP codes are in USDA hardiness zones 8a to 8b.
- Apr 1Last spring frost (median)50% chance of 32°F after this date
- Apr 18Safer planting date10% chance of 32°F after this date
- Nov 3First fall frost (median)50% chance of 32°F by this date
- 217 daysGrowing season (median)between 32°F freezes
Last spring frost dates
The chance that the temperature drops to the threshold after each date.
| Temperature | 90% chance later | 50% chance later | 10% chance later |
|---|---|---|---|
| 36°F | Mar 29 | Apr 14 | Apr 30 |
| 32°F | Mar 16 | Apr 1 | Apr 18 |
| 28°F | Feb 26 | Mar 19 | Apr 6 |
| 24°F | Feb 3 | Mar 4 | Mar 24 |
First fall frost dates
The chance that the temperature has dropped to the threshold by each date.
| Temperature | 10% chance by | 50% chance by | 90% chance by |
|---|---|---|---|
| 36°F | Oct 12 | Oct 25 | Nov 6 |
| 32°F | Oct 21 | Nov 3 | Nov 17 |
| 28°F | Oct 31 | Nov 13 | Dec 3 |
| 24°F | Nov 10 | Nov 29 | Dec 27 |
Growing season length
Days between the last spring and first fall freeze, as the length reached in 9, 5 and 1 out of 10 years.
| Temperature | 9 in 10 years at least | 5 in 10 years at least | 1 in 10 years at least |
|---|---|---|---|
| 36°F | 174 days | 195 days | 215 days |
| 32°F | 197 days | 217 days | 239 days |
| 28°F | 217 days | 241 days | 268 days |
| 24°F | 244 days | 269 days | 306 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 100% |
| 24°F | 100% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 29634 | 8b | 15 to 20°F | 2 km |
| 29631 | 8a | 10 to 15°F | 2 km |
| 29630 | 8a | 10 to 15°F | 9 km |
| 29667 | 8a | 10 to 15°F | 13 km |
| 29689 | 8b | 15 to 20°F | 15 km |
Not the official USDA Plant Hardiness Zone Map. Zones shown here are the values published in the USDA-ARS / Oregon State University PRISM Group 2023 ZIP code tables, shown unaltered. For the official interactive map, visit planthardiness.ars.usda.gov.
About this station
- NOAA station ID USC00381770, at 34.6603, -82.8233, elevation 244 m (800 ft).
- Data quality: Standard (24+ years of data), 28 years of freeze data.
- Average days per year at or below 32°F: 57.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Clemson Oconee Co Airport (6 km)
- Sandy Springs 2 NE (10 km)
- Anderson Co Airport (21 km)
- Anderson (21 km)
- Walhalla (25 km)
- Pickens (26 km)
- W Pelzer (34 km)
- Long Creek (41 km)
Sources
- NOAA National Centers for Environmental Information, U.S. Climate Normals 1991–2020, annual/seasonal normals by station (version 1.0.1), file dated June 27, 2023; documentation.
- USDA Agricultural Research Service and PRISM Group, Oregon State University, 2023 Plant Hardiness Zone Map ZIP code tables (CONUS, Alaska, Hawaii, Puerto Rico), files dated November 17, 2023. Data © PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed November 1, 2026. Official map: planthardiness.ars.usda.gov.
- U.S. Census Bureau, 2024 Gazetteer ZIP Code Tabulation Areas file, dated August 30, 2024 (ZIP centroids used to find the nearest station).
Freeze dates are 30-year probabilities, not forecasts. Check your local forecast before planting tender plants.
All South Carolina stations · How frost dates are calculated