Frost dates for Connellsville 2 SSW, PA
At Connellsville 2 SSW, the median last spring frost (32°F) is Apr 22 and the median first fall frost is Oct 27, for a typical growing season of 187 days. For a 90% chance that the last frost has passed, wait until May 11. Nearby ZIP codes are in USDA hardiness zones 6a to 6b.
- Apr 22Last spring frost (median)50% chance of 32°F after this date
- May 11Safer planting date10% chance of 32°F after this date
- Oct 27First fall frost (median)50% chance of 32°F by this date
- 187 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 19 | May 3 | May 22 |
| 32°F | Apr 6 | Apr 22 | May 11 |
| 28°F | Mar 23 | Apr 7 | Apr 24 |
| 24°F | Mar 10 | Mar 27 | 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 4 | Oct 17 | Oct 30 |
| 32°F | Oct 14 | Oct 27 | Nov 10 |
| 28°F | Oct 25 | Nov 8 | Nov 23 |
| 24°F | Nov 4 | Nov 17 | Dec 9 |
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 | 144 days | 165 days | 185 days |
| 32°F | 165 days | 187 days | 209 days |
| 28°F | 192 days | 214 days | 234 days |
| 24°F | 217 days | 238 days | 262 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 |
|---|---|---|---|
| 15455 | 6b | -5 to 0°F | 4 km |
| 15425 | 6b | -5 to 0°F | 5 km |
| 15430 | 6b | -5 to 0°F | 7 km |
| 15431 | 6a | -10 to -5°F | 8 km |
| 15486 | 6b | -5 to 0°F | 10 km |
| 15631 | 6b | -5 to 0°F | 10 km |
| 15428 | 6b | -5 to 0°F | 12 km |
| 15683 | 6b | -5 to 0°F | 12 km |
| 15464 | 6a | -10 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 USC00361726, at 39.9969, -79.5964, elevation 274 m (900 ft).
- Data quality: Estimated from nearby stations (2+ years), 8 years of freeze data.
- Average days per year at or below 32°F: 116.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Uniontown 1 NE (14 km)
- Chalk Hill 2 ENE (17 km)
- Donegal 2 NW (22 km)
- Mount Pleasant (26 km)
- Hidden Valley (29 km)
- Confluence 1 SW Dam (29 km)
- Donora 1 SW (30 km)
- Charleroi Lock 4 (31 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.