Frost dates for Brunswick, GA
At Brunswick, the median last spring frost (32°F) is Feb 8 and the median first fall frost is Dec 25, for a typical growing season of 314 days. For a 90% chance that the last frost has passed, wait until Mar 10. Nearby ZIP codes are in USDA hardiness zone 9a.
- Feb 8Last spring frost (median)50% chance of 32°F after this date
- Mar 10Safer planting date10% chance of 32°F after this date
- Dec 25First fall frost (median)50% chance of 32°F by this date
- 314 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 | Jan 31 | Feb 27 | Mar 19 |
| 32°F | Jan 9 | Feb 8 | Mar 10 |
| 28°F | Dec 28 | Jan 24 | Feb 26 |
| 24°F | Dec 27 | Jan 16 | Feb 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 | Nov 14 | Dec 4 | Jan 2 |
| 32°F | Nov 26 | Dec 25 | Jan 20 |
| 28°F | Dec 9 | Jan 6 | Feb 4 |
| 24°F | Dec 18 | Jan 14 | Feb 7 |
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 | 250 days | 281 days | 315 days |
| 32°F | 278 days | 314 days | 348 days |
| 28°F | 309 days | 343 days | 365 days |
| 24°F | 332 days | 365 days | 365 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 96% |
| 28°F | 73% |
| 24°F | 33% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 31520 | 9a | 20 to 25°F | 2 km |
| 31524 | 9a | 20 to 25°F | 9 km |
| 31523 | 9a | 20 to 25°F | 12 km |
| 31525 | 9a | 20 to 25°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 USC00091340, at 31.1681, -81.5022, elevation 4 m (13 ft).
- Data quality: Standard (24+ years of data), 26 years of freeze data.
- Average days per year at or below 32°F: 9.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Brunswick Malcolm McKinnon Airport (11 km)
- Woodbine (30 km)
- Sapelo Island (33 km)
- Brunswick 23 S (40 km)
- Nahunta 6ne (41 km)
- Jesup 8 S (51 km)
- Folkston 9 SW (76 km)
- Waycross 4 NE (78 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.