Frost dates for Grundy, VA
At Grundy, the median last spring frost (32°F) is Apr 21 and the median first fall frost is Oct 26, for a typical growing season of 189 days. For a 90% chance that the last frost has passed, wait until May 7. Nearby ZIP codes are in USDA hardiness zone 7a.
- Apr 21Last spring frost (median)50% chance of 32°F after this date
- May 7Safer planting date10% chance of 32°F after this date
- Oct 26First fall frost (median)50% chance of 32°F by this date
- 189 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 18 | Apr 30 | May 18 |
| 32°F | Apr 6 | Apr 21 | May 7 |
| 28°F | Mar 22 | Apr 6 | Apr 21 |
| 24°F | Mar 5 | Mar 24 | Apr 7 |
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 5 | Oct 17 | Oct 29 |
| 32°F | Oct 13 | Oct 26 | Nov 6 |
| 28°F | Oct 21 | Nov 3 | Nov 16 |
| 24°F | Oct 31 | Nov 13 | 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 | 149 days | 168 days | 186 days |
| 32°F | 167 days | 189 days | 207 days |
| 28°F | 192 days | 211 days | 230 days |
| 24°F | 213 days | 235 days | 259 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 |
|---|---|---|---|
| 24614 | 7a | 0 to 5°F | 3 km |
| 24631 | 7a | 0 to 5°F | 10 km |
| 24656 | 7a | 0 to 5°F | 12 km |
| 24646 | 7a | 0 to 5°F | 16 km |
| 24634 | 7a | 0 to 5°F | 17 km |
| 24620 | 7a | 0 to 5°F | 18 km |
| 24873 | 7a | 0 to 5°F | 20 km |
| 24850 | 7a | 0 to 5°F | 21 km |
| 41553 | 7a | 0 to 5°F | 23 km |
| 24817 | 7a | 0 to 5°F | 25 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 USC00443640, at 37.2822, -82.0886, elevation 353 m (1,157 ft).
- Data quality: Representative (10+ years), 23 years of freeze data.
- Average days per year at or below 32°F: 112.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Breaks Interstate Park (18 km)
- Richlands (34 km)
- Nora 4 SSE (36 km)
- Clintwood 1w (39 km)
- Lebanon (42 km)
- Saltville 1n (52 km)
- Wise 1se (54 km)
- Abingdon 3s (69 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.