Frost dates for Radford 3 N, VA
At Radford 3 N, the median last spring frost (32°F) is Apr 26 and the median first fall frost is Oct 18, for a typical growing season of 174 days. For a 90% chance that the last frost has passed, wait until May 16. Nearby ZIP codes are in USDA hardiness zone 7a.
- Apr 26Last spring frost (median)50% chance of 32°F after this date
- May 16Safer planting date10% chance of 32°F after this date
- Oct 18First fall frost (median)50% chance of 32°F by this date
- 174 daysGrowing season (median)between 32°F freezes
USDA hardiness zone 7a (0 to 5°F) · see all zone 7a frost dates
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 21 | May 7 | May 23 |
| 32°F | Apr 10 | Apr 26 | May 16 |
| 28°F | Mar 26 | Apr 10 | May 3 |
| 24°F | Mar 11 | Mar 28 | Apr 10 |
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 25 | Oct 9 | Oct 21 |
| 32°F | Oct 6 | Oct 18 | Oct 31 |
| 28°F | Oct 14 | Oct 28 | Nov 9 |
| 24°F | Oct 24 | Nov 5 | Nov 23 |
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 | 133 days | 153 days | 175 days |
| 32°F | 152 days | 174 days | 195 days |
| 28°F | 174 days | 199 days | 221 days |
| 24°F | 202 days | 223 days | 247 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 |
|---|---|---|---|
| 24058 | 7a | 0 to 5°F | 4 km |
| 24132 | 7a | 0 to 5°F | 6 km |
| 24129 | 7a | 0 to 5°F | 7 km |
| 24141 | 7a | 0 to 5°F | 11 km |
| 24084 | 7a | 0 to 5°F | 12 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 USC00446999, at 37.2008, -80.5864, elevation 549 m (1,800 ft).
- Data quality: Representative (10+ years), 13 years of freeze data.
- Average days per year at or below 32°F: 119.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Pearisburg 4 SSE (13 km)
- Blacksburg NWSO (15 km)
- Christiansburg (18 km)
- Pulaski 2 E (24 km)
- Floyd 2 NE (40 km)
- Copper Hill (42 km)
- Bland (48 km)
- Wytheville (52 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.