Frost dates for Brunswick 23 S, GA
At Brunswick 23 S, the median last spring frost (32°F) is Feb 19 and the median first fall frost is Dec 14, for a typical growing season of 299 days. For a 90% chance that the last frost has passed, wait until Mar 14. Nearby ZIP codes are in USDA hardiness zone 9a.
- Feb 19Last spring frost (median)50% chance of 32°F after this date
- Mar 14Safer planting date10% chance of 32°F after this date
- Dec 14First fall frost (median)50% chance of 32°F by this date
- 299 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 12 | Mar 5 | Mar 31 |
| 32°F | Jan 19 | Feb 19 | Mar 14 |
| 28°F | Dec 31 | Feb 3 | Feb 28 |
| 24°F | Dec 24 | Jan 25 | Feb 15 |
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 11 | Nov 29 | Dec 22 |
| 32°F | Nov 21 | Dec 14 | Jan 15 |
| 28°F | Dec 2 | Jan 3 | Feb 7 |
| 24°F | Dec 11 | Jan 15 | Feb 9 |
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 | 239 days | 267 days | 299 days |
| 32°F | 264 days | 299 days | 332 days |
| 28°F | 296 days | 331 days | 365 days |
| 24°F | 321 days | 365 days | 365 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 98% |
| 28°F | 84% |
| 24°F | 45% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 31558 | 9a | 20 to 25°F | 5 km |
| 31547 | 9a | 20 to 25°F | 7 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 USW00063856, at 30.8078, -81.4597, elevation 8 m (25 ft).
- Data quality: Representative (10+ years), 16 years of freeze data.
- Average days per year at or below 32°F: 12.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Woodbine (29 km)
- Brunswick Malcolm McKinnon Airport (39 km)
- Brunswick (40 km)
- Folkston 9 SW (64 km)
- Sapelo Island (68 km)
- Nahunta 6ne (68 km)
- Fargo 17 NE (86 km)
- Jesup 8 S (87 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.