Frost dates for Fairmont, WV
At Fairmont, the median last spring frost (32°F) is Apr 18 and the median first fall frost is Oct 28, for a typical growing season of 192 days. For a 90% chance that the last frost has passed, wait until May 9. Nearby ZIP codes are in USDA hardiness zone 6b.
- Apr 18Last spring frost (median)50% chance of 32°F after this date
- May 9Safer planting date10% chance of 32°F after this date
- Oct 28First fall frost (median)50% chance of 32°F by this date
- 192 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 15 | Apr 30 | May 19 |
| 32°F | Apr 2 | Apr 18 | May 9 |
| 28°F | Mar 20 | Apr 5 | Apr 21 |
| 24°F | Mar 6 | Mar 25 | Apr 9 |
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 14 | Oct 28 | Nov 8 |
| 28°F | Oct 25 | Nov 6 | Nov 24 |
| 24°F | Nov 3 | Nov 18 | Dec 7 |
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 | 146 days | 167 days | 189 days |
| 32°F | 166 days | 192 days | 214 days |
| 28°F | 194 days | 217 days | 240 days |
| 24°F | 217 days | 240 days | 265 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 |
|---|---|---|---|
| 26554 | 6b | -5 to 0°F | 2 km |
| 26559 | 6b | -5 to 0°F | 7 km |
| 26560 | 6b | -5 to 0°F | 9 km |
| 26576 | 6b | -5 to 0°F | 11 km |
| 26574 | 6b | -5 to 0°F | 12 km |
| 26563 | 6b | -5 to 0°F | 12 km |
| 26568 | 6b | -5 to 0°F | 13 km |
| 26571 | 6b | -5 to 0°F | 13 km |
| 26588 | 6b | -5 to 0°F | 13 km |
| 26591 | 6b | -5 to 0°F | 14 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 USC00462920, at 39.4583, -80.1353, elevation 396 m (1,300 ft).
- Data quality: Standard (24+ years of data), 30 years of freeze data.
- Average days per year at or below 32°F: 109.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Tygart Dam (19 km)
- Clarksburg Benedum Airport (20 km)
- Morgantown L&d (23 km)
- Morgantown Hart Field (28 km)
- Clarksburg 1 (28 km)
- Mannington 8 WNW (30 km)
- Burton (31 km)
- Lake Lynn (38 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.