Frost dates for S Boston, VA
At S Boston, the median last spring frost (32°F) is Apr 10 and the median first fall frost is Oct 30, for a typical growing season of 202 days. For a 90% chance that the last frost has passed, wait until Apr 30. Nearby ZIP codes are in USDA hardiness zone 7b.
- Apr 10Last spring frost (median)50% chance of 32°F after this date
- Apr 30Safer planting date10% chance of 32°F after this date
- Oct 30First fall frost (median)50% chance of 32°F by this date
- 202 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 10 | Apr 23 | May 10 |
| 32°F | Mar 25 | Apr 10 | Apr 30 |
| 28°F | Mar 12 | Mar 29 | Apr 13 |
| 24°F | Feb 25 | Mar 17 | Apr 2 |
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 9 | Oct 22 | Nov 2 |
| 32°F | Oct 17 | Oct 30 | Nov 12 |
| 28°F | Oct 26 | Nov 7 | Nov 26 |
| 24°F | Nov 4 | Nov 21 | Dec 10 |
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 | 159 days | 180 days | 199 days |
| 32°F | 179 days | 202 days | 220 days |
| 28°F | 205 days | 224 days | 249 days |
| 24°F | 225 days | 249 days | 279 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 |
|---|---|---|---|
| 24592 | 7b | 5 to 10°F | 7 km |
| 24558 | 7b | 5 to 10°F | 12 km |
| 24598 | 7b | 5 to 10°F | 13 km |
| 24589 | 7b | 5 to 10°F | 13 km |
| 24539 | 7b | 5 to 10°F | 17 km |
| 24520 | 7b | 5 to 10°F | 18 km |
| 24597 | 7b | 5 to 10°F | 23 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 USC00447925, at 36.6953, -78.8808, elevation 100 m (329 ft).
- Data quality: Standard (24+ years of data), 28 years of freeze data.
- Average days per year at or below 32°F: 108.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Clarksville (31 km)
- Chase City (37 km)
- Brookneal (42 km)
- Danville Regional Airport (43 km)
- Charlotte Court House (45 km)
- Danville 2 SE (46 km)
- Chatham (49 km)
- Keysville 2 S (51 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.