Frost dates for Donegal 2 NW, PA
At Donegal 2 NW, the median last spring frost (32°F) is Apr 30 and the median first fall frost is Oct 17, for a typical growing season of 170 days. For a 90% chance that the last frost has passed, wait until May 18. Nearby ZIP codes are in USDA hardiness zone 6a.
- Apr 30Last spring frost (median)50% chance of 32°F after this date
- May 18Safer planting date10% chance of 32°F after this date
- Oct 17First fall frost (median)50% chance of 32°F by this date
- 170 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 25 | May 11 | May 29 |
| 32°F | Apr 15 | Apr 30 | May 18 |
| 28°F | Apr 3 | Apr 17 | May 8 |
| 24°F | Mar 22 | Apr 5 | Apr 20 |
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 23 | Oct 6 | Oct 19 |
| 32°F | Oct 3 | Oct 17 | Oct 31 |
| 28°F | Oct 13 | Oct 30 | Nov 13 |
| 24°F | Oct 30 | Nov 11 | Nov 29 |
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 | 125 days | 147 days | 168 days |
| 32°F | 146 days | 170 days | 191 days |
| 28°F | 171 days | 195 days | 217 days |
| 24°F | 199 days | 220 days | 242 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 |
|---|---|---|---|
| 15610 | 6a | -10 to -5°F | 1 km |
| 15628 | 6a | -10 to -5°F | 4 km |
| 15646 | 6a | -10 to -5°F | 6 km |
| 15462 | 6a | -10 to -5°F | 8 km |
| 15490 | 6a | -10 to -5°F | 9 km |
| 15469 | 6a | -10 to -5°F | 13 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 USC00362183, at 40.1275, -79.4058, elevation 549 m (1,800 ft).
- Data quality: Representative (10+ years), 15 years of freeze data.
- Average days per year at or below 32°F: 143.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Rector 3 SSW (13 km)
- Mount Pleasant (13 km)
- Hidden Valley (16 km)
- Laurel Mountain (20 km)
- Connellsville 2 SSW (22 km)
- Laurel Summit (23 km)
- Chalk Hill 2 ENE (35 km)
- Uniontown 1 NE (36 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.