Frost dates for Walterboro 1 SW, SC
At Walterboro 1 SW, the median last spring frost (32°F) is Mar 19 and the median first fall frost is Nov 12, for a typical growing season of 239 days. For a 90% chance that the last frost has passed, wait until Apr 9. Nearby ZIP codes are in USDA hardiness zone 8b.
- Mar 19Last spring frost (median)50% chance of 32°F after this date
- Apr 9Safer planting date10% chance of 32°F after this date
- Nov 12First fall frost (median)50% chance of 32°F by this date
- 239 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 12 | Apr 2 | Apr 21 |
| 32°F | Feb 24 | Mar 19 | Apr 9 |
| 28°F | Feb 7 | Mar 1 | Mar 25 |
| 24°F | Jan 18 | Feb 12 | Mar 12 |
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 1 | Nov 16 |
| 32°F | Oct 29 | Nov 12 | Dec 1 |
| 28°F | Nov 6 | Nov 28 | Dec 29 |
| 24°F | Nov 20 | Dec 21 | Jan 21 |
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 | 188 days | 213 days | 238 days |
| 32°F | 210 days | 239 days | 266 days |
| 28°F | 239 days | 271 days | 307 days |
| 24°F | 272 days | 308 days | 341 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 100% |
| 24°F | 96% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 29488 | 8b | 15 to 20°F | 2 km |
| 29474 | 8b | 15 to 20°F | 14 km |
| 29475 | 8b | 15 to 20°F | 16 km |
| 29435 | 8b | 15 to 20°F | 21 km |
| 29493 | 8b | 15 to 20°F | 24 km |
| 29481 | 8b | 15 to 20°F | 28 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 USC00388922, at 32.8850, -80.6761, elevation 17 m (56 ft).
- Data quality: Representative (10+ years), 19 years of freeze data.
- Average days per year at or below 32°F: 44.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Yemassee 1 N (26 km)
- Hampton 1s (42 km)
- Summerville 4w (45 km)
- Beaufort MCAS (45 km)
- Edisto Island Middleton Plantation (45 km)
- Holly Hill 1 SW (54 km)
- Beaufort Wastewater Plant (54 km)
- Edisto Beach State Park (55 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