Frost dates for Roanoke Regional Airport, VA
At Roanoke Regional Airport, the median last spring frost (32°F) is Apr 3 and the median first fall frost is Nov 1, for a typical growing season of 210 days. For a 90% chance that the last frost has passed, wait until Apr 18. Nearby ZIP codes are in USDA hardiness zones 7a to 7b.
- Apr 3Last spring frost (median)50% chance of 32°F after this date
- Apr 18Safer planting date10% chance of 32°F after this date
- Nov 1First fall frost (median)50% chance of 32°F by this date
- 210 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 3 | Apr 17 | May 7 |
| 32°F | Mar 19 | Apr 3 | Apr 18 |
| 28°F | Mar 4 | Mar 22 | Apr 7 |
| 24°F | Feb 17 | Mar 9 | Mar 27 |
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 4 |
| 32°F | Oct 18 | Nov 1 | Nov 15 |
| 28°F | Oct 30 | Nov 12 | Dec 1 |
| 24°F | Nov 9 | Nov 28 | Dec 19 |
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 | 164 days | 185 days | 207 days |
| 32°F | 189 days | 210 days | 231 days |
| 28°F | 213 days | 234 days | 261 days |
| 24°F | 236 days | 263 days | 291 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 |
|---|---|---|---|
| 24017 | 7b | 5 to 10°F | 3 km |
| 24016 | 7b | 5 to 10°F | 5 km |
| 24022 | 7b | 5 to 10°F | 6 km |
| 24012 | 7b | 5 to 10°F | 7 km |
| 24015 | 7b | 5 to 10°F | 7 km |
| 24013 | 7b | 5 to 10°F | 7 km |
| 24014 | 7b | 5 to 10°F | 12 km |
| 24153 | 7b | 5 to 10°F | 12 km |
| 24018 | 7b | 5 to 10°F | 13 km |
| 24179 | 7b | 5 to 10°F | 16 km |
| 24101 | 7b | 5 to 10°F | 22 km |
| 24095 | 7b | 5 to 10°F | 23 km |
| 24070 | 7a | 0 to 5°F | 24 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 USW00013741, at 37.3169, -79.9742, elevation 358 m (1,175 ft).
- Data quality: Standard (24+ years of data), 30 years of freeze data.
- Average days per year at or below 32°F: 77.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Roanoke 8 N (5 km)
- Copper Hill (30 km)
- Buchanan (35 km)
- Rocky Mount (38 km)
- Blacksburg NWSO (41 km)
- Bedford (41 km)
- Christiansburg (43 km)
- Floyd 2 NE (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.