Frost dates for Union 3 SSE, WV
At Union 3 SSE, the median last spring frost (32°F) is Apr 30 and the median first fall frost is Oct 12, for a typical growing season of 165 days. For a 90% chance that the last frost has passed, wait until May 17. Nearby ZIP codes are in USDA hardiness zones 6b to 7a.
- Apr 30Last spring frost (median)50% chance of 32°F after this date
- May 17Safer planting date10% chance of 32°F after this date
- Oct 12First fall frost (median)50% chance of 32°F by this date
- 165 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 24 | May 10 | May 26 |
| 32°F | Apr 12 | Apr 30 | May 17 |
| 28°F | Mar 31 | Apr 15 | May 6 |
| 24°F | Mar 16 | Apr 1 | Apr 16 |
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 | Sep 20 | Oct 4 | Oct 16 |
| 32°F | Sep 30 | Oct 12 | Oct 26 |
| 28°F | Oct 9 | Oct 22 | Nov 5 |
| 24°F | Oct 15 | Nov 1 | Nov 14 |
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 | 125 days | 147 days | 168 days |
| 32°F | 141 days | 165 days | 187 days |
| 28°F | 163 days | 188 days | 211 days |
| 24°F | 190 days | 212 days | 234 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 |
|---|---|---|---|
| 24983 | 6b | -5 to 0°F | 6 km |
| 24951 | 7a | 0 to 5°F | 10 km |
| 24984 | 6b | -5 to 0°F | 12 km |
| 24976 | 6b | -5 to 0°F | 13 km |
| 24974 | 6b | -5 to 0°F | 13 km |
| 24945 | 7a | 0 to 5°F | 15 km |
| 24941 | 6b | -5 to 0°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 USC00469011, at 37.5436, -80.5336, elevation 643 m (2,110 ft).
- Data quality: Representative (10+ years), 16 years of freeze data.
- Average days per year at or below 32°F: 134.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Alderson (23 km)
- Bluestone Lake (33 km)
- White Sulphur Springs (34 km)
- Lewisburg 3 N (37 km)
- Athens (45 km)
- Rupert 4 N (54 km)
- Beckley Raleigh Co Airport (58 km)
- Beckley Va Hospital (63 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.