Frost dates for Purcellville, VA
At Purcellville, the median last spring frost (32°F) is Apr 16 and the median first fall frost is Oct 25, 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 zones 7a to 7b.
- Apr 16Last spring frost (median)50% chance of 32°F after this date
- May 7Safer planting date10% chance of 32°F after this date
- Oct 25First 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 14 | May 1 | May 20 |
| 32°F | Mar 31 | Apr 16 | May 7 |
| 28°F | Mar 20 | Apr 2 | Apr 17 |
| 24°F | Mar 6 | Mar 22 | Apr 5 |
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 12 | Oct 27 |
| 32°F | Oct 7 | Oct 25 | Nov 7 |
| 28°F | Oct 21 | Nov 5 | Nov 20 |
| 24°F | Nov 3 | Nov 17 | Dec 5 |
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 | 141 days | 165 days | 188 days |
| 32°F | 165 days | 189 days | 210 days |
| 28°F | 194 days | 215 days | 236 days |
| 24°F | 217 days | 240 days | 266 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 |
|---|---|---|---|
| 20132 | 7a | 0 to 5°F | 3 km |
| 20158 | 7a | 0 to 5°F | 4 km |
| 20141 | 7a | 0 to 5°F | 7 km |
| 20197 | 7a | 0 to 5°F | 9 km |
| 20129 | 7a | 0 to 5°F | 10 km |
| 20175 | 7b | 5 to 10°F | 13 km |
| 20180 | 7a | 0 to 5°F | 15 km |
| 20176 | 7a | 0 to 5°F | 16 km |
| 25414 | 7a | 0 to 5°F | 17 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 USC00444909, at 39.1422, -77.7094, elevation 155 m (510 ft).
- Data quality: Representative (10+ years), 21 years of freeze data.
- Average days per year at or below 32°F: 115.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Mount Wx (18 km)
- Mount Wx 3 (18 km)
- WFO Sterling (27 km)
- Washington DC Dulles Airport (31 km)
- Winchester 7 SE (35 km)
- Winchester (38 km)
- Vienna (46 km)
- Front Royal (49 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.