Frost dates for Uniontown 1 NE, PA
At Uniontown 1 NE, the median last spring frost (32°F) is Apr 30 and the median first fall frost is Oct 18, for a typical growing season of 171 days. For a 90% chance that the last frost has passed, wait until May 18. Nearby ZIP codes are in USDA hardiness zones 6a to 7a.
- 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 18First fall frost (median)50% chance of 32°F by this date
- 171 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 10 | May 27 |
| 32°F | Apr 15 | Apr 30 | May 18 |
| 28°F | Mar 31 | Apr 17 | May 6 |
| 24°F | Mar 18 | Apr 2 | Apr 18 |
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 25 | Oct 7 | Oct 20 |
| 32°F | Oct 5 | Oct 18 | Oct 30 |
| 28°F | Oct 14 | Oct 28 | Nov 10 |
| 24°F | Oct 25 | Nov 6 | Nov 24 |
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 | 127 days | 150 days | 170 days |
| 32°F | 149 days | 171 days | 191 days |
| 28°F | 171 days | 195 days | 216 days |
| 24°F | 199 days | 218 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 |
|---|---|---|---|
| 15472 | 6b | -5 to 0°F | 1 km |
| 15401 | 6b | -5 to 0°F | 3 km |
| 15489 | 6b | -5 to 0°F | 5 km |
| 15484 | 6b | -5 to 0°F | 6 km |
| 15456 | 6b | -5 to 0°F | 6 km |
| 15445 | 6a | -10 to -5°F | 6 km |
| 15416 | 6b | -5 to 0°F | 6 km |
| 15465 | 6b | -5 to 0°F | 7 km |
| 15488 | 6b | -5 to 0°F | 8 km |
| 15449 | 6b | -5 to 0°F | 8 km |
| 15480 | 6b | -5 to 0°F | 9 km |
| 15468 | 6b | -5 to 0°F | 10 km |
| 15422 | 6b | -5 to 0°F | 10 km |
| 15436 | 6b | -5 to 0°F | 11 km |
| 15435 | 6b | -5 to 0°F | 11 km |
| 15458 | 6b | -5 to 0°F | 12 km |
| 15420 | 6b | -5 to 0°F | 13 km |
| 15443 | 7a | 0 to 5°F | 14 km |
| 15475 | 6b | -5 to 0°F | 15 km |
| 15413 | 6b | -5 to 0°F | 15 km |
| 15463 | 6b | -5 to 0°F | 16 km |
| 15447 | 6b | -5 to 0°F | 19 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 USC00369050, at 39.9150, -79.7192, elevation 291 m (956 ft).
- Data quality: Standard (24+ years of data), 26 years of freeze data.
- Average days per year at or below 32°F: 129.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Chalk Hill 2 ENE (13 km)
- Connellsville 2 SSW (14 km)
- Grays Landing (22 km)
- Point Marion Lock 8 (27 km)
- Charleroi Lock 4 (30 km)
- Donora 1 SW (30 km)
- Confluence 1 SW Dam (33 km)
- Donegal 2 NW (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.