Frost dates for John H Kerr Dam, VA
At John H Kerr Dam, the median last spring frost (32°F) is Apr 5 and the median first fall frost is Nov 1, for a typical growing season of 210 days. For a 90% chance that the last frost has passed, wait until Apr 19. Nearby ZIP codes are in USDA hardiness zones 7b to 8a.
- Apr 5Last spring frost (median)50% chance of 32°F after this date
- Apr 19Safer planting date10% chance of 32°F after this date
- Nov 1First fall frost (median)50% chance of 32°F by this date
- 210 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 | Apr 4 | Apr 17 | May 5 |
| 32°F | Mar 20 | Apr 5 | Apr 19 |
| 28°F | Mar 5 | Mar 24 | Apr 7 |
| 24°F | Feb 19 | Mar 10 | Mar 28 |
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 12 | Oct 24 | Nov 4 |
| 32°F | Oct 20 | Nov 1 | Nov 14 |
| 28°F | Oct 29 | Nov 11 | Dec 1 |
| 24°F | Nov 10 | Nov 29 | Dec 24 |
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 | 166 days | 187 days | 205 days |
| 32°F | 190 days | 210 days | 230 days |
| 28°F | 213 days | 234 days | 258 days |
| 24°F | 237 days | 263 days | 290 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 100% |
| 24°F | 100% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 23917 | 7b | 5 to 10°F | 5 km |
| 23915 | 7b | 5 to 10°F | 10 km |
| 27553 | 7b | 5 to 10°F | 13 km |
| 23919 | 8a | 10 to 15°F | 15 km |
| 27594 | 7b | 5 to 10°F | 19 km |
| 23970 | 7b | 5 to 10°F | 19 km |
| 23950 | 7b | 5 to 10°F | 21 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 USC00444414, at 36.6003, -78.3011, elevation 76 m (250 ft).
- Data quality: Standard (24+ years of data), 28 years of freeze data.
- Average days per year at or below 32°F: 80.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Clarksville (22 km)
- Chase City (25 km)
- Keysville 2 S (49 km)
- Lawrenceville 3 E (49 km)
- S Boston (53 km)
- Fort Pickett (58 km)
- Charlotte Court House (59 km)
- Greenbay 3 NE (64 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.