Frost dates for Clermont 1 NW, PA
At Clermont 1 NW, the median last spring frost (32°F) is May 15 and the median first fall frost is Oct 3, for a typical growing season of 140 days. For a 90% chance that the last frost has passed, wait until May 31. Nearby ZIP codes are in USDA hardiness zone 5b.
- May 15Last spring frost (median)50% chance of 32°F after this date
- May 31Safer planting date10% chance of 32°F after this date
- Oct 3First fall frost (median)50% chance of 32°F by this date
- 140 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 13 | May 29 | Jun 11 |
| 32°F | Apr 30 | May 15 | May 31 |
| 28°F | Apr 19 | May 4 | May 20 |
| 24°F | Apr 7 | Apr 21 | May 7 |
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 6 | Sep 23 | Oct 4 |
| 32°F | Sep 21 | Oct 3 | Oct 18 |
| 28°F | Oct 1 | Oct 16 | Nov 1 |
| 24°F | Oct 13 | Oct 31 | Nov 15 |
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 | 95 days | 116 days | 136 days |
| 32°F | 121 days | 140 days | 162 days |
| 28°F | 142 days | 165 days | 188 days |
| 24°F | 168 days | 192 days | 213 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 |
|---|---|---|---|
| 16740 | 5b | -15 to -10°F | 5 km |
| 16733 | 5b | -15 to -10°F | 6 km |
| 16749 | 5b | -15 to -10°F | 9 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 USC00361526, at 41.6997, -78.4978, elevation 634 m (2,080 ft).
- Data quality: Representative (10+ years), 20 years of freeze data.
- Average days per year at or below 32°F: 166.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Bradford Regional Airport (16 km)
- Glen Hazel 2 NE Dam (18 km)
- Port Allegany (22 km)
- Kane 1nne (26 km)
- Bradford 4sw Rsch 5 (28 km)
- Emporium (31 km)
- Ridgway (38 km)
- Coudersport 1 SW (38 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.