Frost dates for Edisto Island Middleton Plantation, SC
At Edisto Island Middleton Plantation, the median last spring frost (32°F) is Mar 1 and the median first fall frost is Dec 6, for a typical growing season of 284 days. For a 90% chance that the last frost has passed, wait until Mar 22. Nearby ZIP codes are in USDA hardiness zone 9a.
- Mar 1Last spring frost (median)50% chance of 32°F after this date
- Mar 22Safer planting date10% chance of 32°F after this date
- Dec 6First fall frost (median)50% chance of 32°F by this date
- 284 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 | Feb 22 | Mar 13 | Mar 31 |
| 32°F | Feb 1 | Mar 1 | Mar 22 |
| 28°F | Jan 9 | Feb 10 | Mar 9 |
| 24°F | Dec 31 | Jan 29 | Mar 1 |
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 | Nov 5 | Nov 21 | Dec 12 |
| 32°F | Nov 15 | Dec 6 | Jan 4 |
| 28°F | Dec 1 | Dec 29 | Jan 26 |
| 24°F | Dec 16 | Jan 8 | Feb 8 |
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 | 227 days | 254 days | 280 days |
| 32°F | 253 days | 284 days | 318 days |
| 28°F | 282 days | 316 days | 353 days |
| 24°F | 308 days | 350 days | 365 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 95% |
| 24°F | 68% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 29438 | 9a | 20 to 25°F | 5 km |
| 29449 | 9a | 20 to 25°F | 11 km |
| 29487 | 9a | 20 to 25°F | 14 km |
| 29446 | 9a | 20 to 25°F | 17 km |
| 29452 | 9a | 20 to 25°F | 18 km |
| 29426 | 9a | 20 to 25°F | 19 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 USC00382735, at 32.6072, -80.3258, elevation 4 m (12 ft).
- Data quality: Representative (10+ years), 15 years of freeze data.
- Average days per year at or below 32°F: 16.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Edisto Beach State Park (12 km)
- Beaufort MCAS (39 km)
- Charleston City (42 km)
- Beaufort Wastewater Plant (42 km)
- Charleston Intl Airport (42 km)
- Walterboro 1 SW (45 km)
- Sullivans Island (47 km)
- Summerville 4w (49 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