Frost dates for Somerset, VA
At Somerset, the median last spring frost (32°F) is Apr 17 and the median first fall frost is Oct 22, for a typical growing season of 188 days. For a 90% chance that the last frost has passed, wait until May 6. Nearby ZIP codes are in USDA hardiness zones 7a to 7b.
- Apr 17Last spring frost (median)50% chance of 32°F after this date
- May 6Safer planting date10% chance of 32°F after this date
- Oct 22First fall frost (median)50% chance of 32°F by this date
- 188 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 14 | Apr 29 | May 17 |
| 32°F | Apr 1 | Apr 17 | May 6 |
| 28°F | Mar 19 | Apr 3 | Apr 20 |
| 24°F | Mar 4 | Mar 23 | Apr 5 |
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 2 | Oct 13 | Oct 26 |
| 32°F | Oct 9 | Oct 22 | Nov 3 |
| 28°F | Oct 17 | Nov 1 | Nov 13 |
| 24°F | Oct 28 | Nov 11 | Dec 1 |
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 | 146 days | 167 days | 188 days |
| 32°F | 165 days | 188 days | 208 days |
| 28°F | 189 days | 210 days | 230 days |
| 24°F | 212 days | 234 days | 258 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 |
|---|---|---|---|
| 22972 | 7a | 0 to 5°F | 5 km |
| 22738 | 7a | 0 to 5°F | 5 km |
| 22923 | 7a | 0 to 5°F | 7 km |
| 22732 | 7a | 0 to 5°F | 10 km |
| 22709 | 7a | 0 to 5°F | 10 km |
| 22968 | 7b | 5 to 10°F | 11 km |
| 22731 | 7a | 0 to 5°F | 11 km |
| 22723 | 7a | 0 to 5°F | 14 km |
| 22973 | 7b | 5 to 10°F | 20 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 USC00447904, at 38.2456, -78.2703, elevation 155 m (510 ft).
- Data quality: Representative (10+ years), 21 years of freeze data.
- Average days per year at or below 32°F: 109.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Piedmont Rsch Station (13 km)
- Charlottesville Airport (20 km)
- Monticello (30 km)
- Louisa (32 km)
- Charlottesville 2w (32 km)
- Charlottesville 2 SSE (32 km)
- Free Union (33 km)
- Big Meadows (34 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.