Frost dates for Summerville 4w, SC
At Summerville 4w, the median last spring frost (32°F) is Mar 22 and the median first fall frost is Nov 12, for a typical growing season of 238 days. For a 90% chance that the last frost has passed, wait until Apr 7. Nearby ZIP codes are in USDA hardiness zone 8b.
- Mar 22Last spring frost (median)50% chance of 32°F after this date
- Apr 7Safer planting date10% chance of 32°F after this date
- Nov 12First fall frost (median)50% chance of 32°F by this date
- 238 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 16 | Apr 3 | Apr 19 |
| 32°F | Mar 1 | Mar 22 | Apr 7 |
| 28°F | Feb 10 | Mar 7 | Mar 28 |
| 24°F | Jan 19 | Feb 17 | Mar 17 |
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 19 | Nov 3 | Nov 18 |
| 32°F | Oct 29 | Nov 12 | Dec 3 |
| 28°F | Nov 7 | Nov 29 | Dec 28 |
| 24°F | Nov 23 | Dec 19 | Jan 20 |
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 | 192 days | 213 days | 238 days |
| 32°F | 213 days | 238 days | 266 days |
| 28°F | 235 days | 265 days | 301 days |
| 24°F | 265 days | 301 days | 340 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 100% |
| 24°F | 98% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 29483 | 8b | 15 to 20°F | 1 km |
| 29472 | 8b | 15 to 20°F | 9 km |
| 29486 | 8b | 15 to 20°F | 10 km |
| 29485 | 8b | 15 to 20°F | 12 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 USC00388426, at 33.0367, -80.2325, elevation 20 m (65 ft).
- Data quality: Representative (10+ years), 22 years of freeze data.
- Average days per year at or below 32°F: 45.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Charleston Intl Airport (24 km)
- Moncks Corner 4 N (32 km)
- Holly Hill 1 SW (36 km)
- Charleston City (40 km)
- Walterboro 1 SW (45 km)
- Sullivans Island (47 km)
- Edisto Island Middleton Plantation (49 km)
- Jamestown (57 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