Frost dates for Ridgway, PA
At Ridgway, the median last spring frost (32°F) is May 13 and the median first fall frost is Oct 11, for a typical growing season of 150 days. For a 90% chance that the last frost has passed, wait until May 28. Nearby ZIP codes are in USDA hardiness zone 5b.
- May 13Last spring frost (median)50% chance of 32°F after this date
- May 28Safer planting date10% chance of 32°F after this date
- Oct 11First fall frost (median)50% chance of 32°F by this date
- 150 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 | May 8 | May 25 | Jun 7 |
| 32°F | Apr 26 | May 13 | May 28 |
| 28°F | Apr 17 | May 1 | May 19 |
| 24°F | Apr 2 | Apr 18 | May 8 |
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 15 | Sep 29 | Oct 11 |
| 32°F | Sep 28 | Oct 11 | Oct 26 |
| 28°F | Oct 9 | Oct 25 | Nov 7 |
| 24°F | Oct 22 | Nov 5 | Nov 19 |
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 | 108 days | 127 days | 148 days |
| 32°F | 127 days | 150 days | 174 days |
| 28°F | 152 days | 175 days | 197 days |
| 24°F | 177 days | 201 days | 222 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 |
|---|---|---|---|
| 15853 | 5b | -15 to -10°F | 5 km |
| 15845 | 5b | -15 to -10°F | 10 km |
| 15831 | 5b | -15 to -10°F | 14 km |
| 15846 | 5b | -15 to -10°F | 15 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 USC00367477, at 41.4197, -78.7492, elevation 414 m (1,360 ft).
- Data quality: Standard (24+ years of data), 28 years of freeze data.
- Average days per year at or below 32°F: 164.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Glen Hazel 2 NE Dam (20 km)
- Kane 1nne (29 km)
- Dubois Jefferson Co Airport (30 km)
- Clermont 1 NW (38 km)
- Cooksburg 2 NW (40 km)
- Bradford Regional Airport (44 km)
- Emporium (45 km)
- Clearfield Lawrence Airport (50 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.