Frost dates for Winthrop Univ, SC
At Winthrop Univ, the median last spring frost (32°F) is Mar 27 and the median first fall frost is Nov 5, for a typical growing season of 225 days. For a 90% chance that the last frost has passed, wait until Apr 11. Nearby ZIP codes are in USDA hardiness zone 8a.
- 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 5First fall frost (median)50% chance of 32°F by this date
- 225 daysGrowing season (median)between 32°F freezes
USDA hardiness zone 8a (10 to 15°F) · see all zone 8a frost dates
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 24 | Apr 9 | Apr 23 |
| 32°F | Mar 10 | Mar 27 | Apr 11 |
| 28°F | Feb 23 | Mar 15 | Mar 31 |
| 24°F | Feb 5 | Mar 1 | Mar 22 |
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 16 | Oct 27 | Nov 9 |
| 32°F | Oct 24 | Nov 5 | Nov 23 |
| 28°F | Nov 2 | Nov 18 | Dec 9 |
| 24°F | Nov 15 | Dec 5 | Jan 5 |
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 | 183 days | 203 days | 223 days |
| 32°F | 205 days | 225 days | 248 days |
| 28°F | 226 days | 249 days | 277 days |
| 24°F | 247 days | 280 days | 313 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 |
|---|---|---|---|
| 29733 | 8a | 10 to 15°F | 0 km |
| 29730 | 8a | 10 to 15°F | 6 km |
| 29704 | 8a | 10 to 15°F | 16 km |
| 29712 | 8a | 10 to 15°F | 17 km |
| 29707 | 8a | 10 to 15°F | 17 km |
| 29724 | 8a | 10 to 15°F | 18 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 USC00389350, at 34.9389, -81.0331, elevation 198 m (650 ft).
- Data quality: Standard (24+ years of data), 28 years of freeze data.
- Average days per year at or below 32°F: 51.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Rock Hill York Co Airport (6 km)
- York 5 SSE (15 km)
- Chester 1 SE (32 km)
- Ninety Nine Island (43 km)
- Santuck (56 km)
- Winnsboro (63 km)
- Pageland (63 km)
- Union 8 S (68 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