Frost dates for Calhoun Falls, SC
At Calhoun Falls, the median last spring frost (32°F) is Mar 27 and the median first fall frost is Nov 7, for a typical growing season of 226 days. For a 90% chance that the last frost has passed, wait until Apr 11. Nearby ZIP codes are in USDA hardiness zones 8a to 8b.
- Mar 27Last spring frost (median)50% chance of 32°F after this date
- Apr 11Safer planting date10% chance of 32°F after this date
- Nov 7First fall frost (median)50% chance of 32°F by this date
- 226 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 21 | Apr 6 | Apr 21 |
| 32°F | Mar 8 | Mar 27 | Apr 11 |
| 28°F | Feb 16 | Mar 13 | Mar 30 |
| 24°F | Jan 25 | Feb 25 | Mar 18 |
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 17 | Oct 30 | Nov 11 |
| 32°F | Oct 26 | Nov 7 | Nov 24 |
| 28°F | Nov 5 | Nov 22 | Dec 15 |
| 24°F | Nov 17 | Dec 8 | Jan 9 |
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 | 187 days | 206 days | 225 days |
| 32°F | 205 days | 226 days | 250 days |
| 28°F | 227 days | 253 days | 284 days |
| 24°F | 256 days | 289 days | 325 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 |
|---|---|---|---|
| 29628 | 8a | 10 to 15°F | 2 km |
| 29840 | 8b | 15 to 20°F | 11 km |
| 29659 | 8a | 10 to 15°F | 14 km |
| 29620 | 8a | 10 to 15°F | 18 km |
| 29655 | 8a | 10 to 15°F | 20 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 USC00381277, at 34.0906, -82.5883, elevation 162 m (530 ft).
- Data quality: Standard (24+ years of data), 26 years of freeze data.
- Average days per year at or below 32°F: 60.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- McCormick (34 km)
- Greenwood (40 km)
- Greenwood Co Airport (43 km)
- Anderson Co Airport (47 km)
- Anderson (49 km)
- Greenwood 8ne (54 km)
- Sandy Springs 2 NE (59 km)
- Clarks Hill 1 W (60 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