Frost dates for Port Gibson 1 NE, MS
At Port Gibson 1 NE, the median last spring frost (32°F) is Mar 17 and the median first fall frost is Nov 12, for a typical growing season of 241 days. For a 90% chance that the last frost has passed, wait until Apr 7. Nearby ZIP codes are in USDA hardiness zone 8b.
- Mar 17Last spring frost (median)50% chance of 32°F after this date
- Apr 7Safer planting date10% chance of 32°F after this date
- Nov 12First fall frost (median)50% chance of 32°F by this date
- 241 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 | Mar 31 | Apr 19 |
| 32°F | Feb 24 | Mar 17 | Apr 7 |
| 28°F | Feb 3 | Mar 1 | Mar 22 |
| 24°F | Jan 15 | Feb 15 | Mar 11 |
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 2 | Nov 17 |
| 32°F | Oct 29 | Nov 12 | Dec 1 |
| 28°F | Nov 5 | Nov 25 | Dec 27 |
| 24°F | Nov 15 | Dec 13 | Jan 18 |
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 | 194 days | 217 days | 242 days |
| 32°F | 213 days | 241 days | 271 days |
| 28°F | 241 days | 271 days | 305 days |
| 24°F | 267 days | 306 days | 339 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 100% |
| 24°F | 97% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 39150 | 8b | 15 to 20°F | 1 km |
| 39086 | 8b | 15 to 20°F | 20 km |
| 39144 | 8b | 15 to 20°F | 25 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 USC00227132, at 31.9850, -90.9719, elevation 37 m (120 ft).
- Data quality: Representative (10+ years), 25 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
- Vicksburg City (45 km)
- Oakley Exp. Station (50 km)
- Hazlehurst 5 SW (52 km)
- Natchez (56 km)
- Crystal Springs Exp. Station (56 km)
- Meadville (58 km)
- Brookhaven City (69 km)
- Satartia 8 SW (74 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.