Frost dates for Hidden Valley, PA
At Hidden Valley, the median last spring frost (32°F) is May 2 and the median first fall frost is Oct 17, for a typical growing season of 168 days. For a 90% chance that the last frost has passed, wait until May 18. Nearby ZIP codes are in USDA hardiness zone 6a.
- May 2Last 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
- 168 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 28 | May 11 | May 26 |
| 32°F | Apr 19 | May 2 | May 18 |
| 28°F | Apr 9 | Apr 22 | May 8 |
| 24°F | Mar 28 | Apr 10 | Apr 26 |
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 6 | Oct 19 |
| 32°F | Oct 5 | Oct 17 | Oct 30 |
| 28°F | Oct 14 | Oct 28 | Nov 11 |
| 24°F | Oct 27 | Nov 8 | Nov 22 |
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 | 129 days | 149 days | 167 days |
| 32°F | 149 days | 168 days | 187 days |
| 28°F | 169 days | 189 days | 209 days |
| 24°F | 191 days | 212 days | 232 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 |
|---|---|---|---|
| 15502 | 6a | -10 to -5°F | 2 km |
| 15622 | 6a | -10 to -5°F | 5 km |
| 15501 | 6a | -10 to -5°F | 11 km |
| 15446 | 6a | -10 to -5°F | 11 km |
| 15557 | 6a | -10 to -5°F | 15 km |
| 15510 | 6a | -10 to -5°F | 20 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 USC00363928, at 40.0419, -79.2567, elevation 877 m (2,876 ft).
- Data quality: Estimated from nearby stations (2+ years), 3 years of freeze data.
- Average days per year at or below 32°F: 142.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Rector 3 SSW (14 km)
- Donegal 2 NW (16 km)
- Laurel Summit (17 km)
- Laurel Mountain (19 km)
- Mount Pleasant (28 km)
- Confluence 1 SW Dam (29 km)
- Connellsville 2 SSW (29 km)
- Meyersdale 2 SSW (34 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.