Frost dates for Martinsburg E Wv Regional Airport, WV
At Martinsburg E Wv Regional Airport, the median last spring frost (32°F) is Apr 20 and the median first fall frost is Oct 22, for a typical growing season of 183 days. For a 90% chance that the last frost has passed, wait until May 12. Nearby ZIP codes are in USDA hardiness zone 7a.
- Apr 20Last spring frost (median)50% chance of 32°F after this date
- May 12Safer planting date10% chance of 32°F after this date
- Oct 22First fall frost (median)50% chance of 32°F by this date
- 183 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 17 | May 5 | May 22 |
| 32°F | Apr 3 | Apr 20 | May 12 |
| 28°F | Mar 22 | Apr 4 | Apr 22 |
| 24°F | Mar 8 | Mar 24 | Apr 6 |
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 29 | Oct 11 | Oct 25 |
| 32°F | Oct 7 | Oct 22 | Nov 4 |
| 28°F | Oct 16 | Nov 1 | Nov 14 |
| 24°F | Oct 28 | Nov 12 | Nov 28 |
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 | 136 days | 158 days | 180 days |
| 32°F | 158 days | 183 days | 205 days |
| 28°F | 184 days | 208 days | 230 days |
| 24°F | 210 days | 233 days | 254 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 |
|---|---|---|---|
| 25405 | 7a | 0 to 5°F | 2 km |
| 25428 | 7a | 0 to 5°F | 4 km |
| 25430 | 7a | 0 to 5°F | 9 km |
| 25420 | 7a | 0 to 5°F | 12 km |
| 25413 | 7a | 0 to 5°F | 12 km |
| 25438 | 7a | 0 to 5°F | 14 km |
| 25421 | 7a | 0 to 5°F | 16 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 USW00013734, at 39.4019, -77.9844, elevation 163 m (534 ft).
- Data quality: Standard (24+ years of data), 29 years of freeze data.
- Average days per year at or below 32°F: 104.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Martinsburg 2 (7 km)
- Cacapon St. Pk #2 (29 km)
- Wardensville R M Farm (61 km)
- Romney 1 SW (68 km)
- Lost River (87 km)
- Keyser 2 SSW (88 km)
- Moorefield 1 SSE (93 km)
- Petersburg (109 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.