Frost dates for Marion, SC
At Marion, the median last spring frost (32°F) is Mar 22 and the median first fall frost is Nov 11, for a typical growing season of 234 days. For a 90% chance that the last frost has passed, wait until Apr 13. Nearby ZIP codes are in USDA hardiness zone 8b.
- Mar 22Last spring frost (median)50% chance of 32°F after this date
- Apr 13Safer planting date10% chance of 32°F after this date
- Nov 11First fall frost (median)50% chance of 32°F by this date
- 234 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 19 | Apr 6 | Apr 22 |
| 32°F | Feb 28 | Mar 22 | Apr 13 |
| 28°F | Feb 9 | Mar 4 | Mar 30 |
| 24°F | Jan 21 | Feb 16 | 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 20 | Nov 1 | Nov 18 |
| 32°F | Oct 30 | Nov 11 | Dec 2 |
| 28°F | Nov 6 | Nov 24 | Dec 17 |
| 24°F | Nov 18 | Dec 9 | Jan 13 |
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 | 209 days | 231 days |
| 32°F | 208 days | 234 days | 263 days |
| 28°F | 232 days | 264 days | 297 days |
| 24°F | 263 days | 300 days | 335 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 100% |
| 24°F | 99% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 29571 | 8b | 15 to 20°F | 5 km |
| 29589 | 8b | 15 to 20°F | 9 km |
| 29592 | 8b | 15 to 20°F | 11 km |
| 29519 | 8b | 15 to 20°F | 17 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 USC00385509, at 34.1653, -79.3875, elevation 23 m (75 ft).
- Data quality: Representative (10+ years), 18 years of freeze data.
- Average days per year at or below 32°F: 49.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Mullins (13 km)
- Dillon (27 km)
- Florence Regional Airport (31 km)
- Florence 8 NE (35 km)
- Lake City 2 SE (46 km)
- Darlington (47 km)
- Conway (48 km)
- Hemingway 8 ESE (54 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