Frost dates for Oswayo 1 ENE, PA
At Oswayo 1 ENE, the median last spring frost (32°F) is May 20 and the median first fall frost is Sep 29, for a typical growing season of 130 days. For a 90% chance that the last frost has passed, wait until Jun 2. Nearby ZIP codes are in USDA hardiness zone 5b.
- May 20Last spring frost (median)50% chance of 32°F after this date
- Jun 2Safer planting date10% chance of 32°F after this date
- Sep 29First fall frost (median)50% chance of 32°F by this date
- 130 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 18 | Jun 2 | Jun 24 |
| 32°F | May 5 | May 20 | Jun 2 |
| 28°F | Apr 25 | May 6 | May 25 |
| 24°F | Apr 14 | Apr 27 | May 13 |
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 2 | Sep 17 | Oct 1 |
| 32°F | Sep 14 | Sep 29 | Oct 10 |
| 28°F | Sep 26 | Oct 9 | Oct 25 |
| 24°F | Oct 7 | Oct 24 | Nov 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 | 74 days | 103 days | 124 days |
| 32°F | 109 days | 130 days | 150 days |
| 28°F | 133 days | 153 days | 174 days |
| 24°F | 156 days | 178 days | 199 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 |
|---|---|---|---|
| 14708 | 5b | -15 to -10°F | 12 km |
| 16748 | 5b | -15 to -10°F | 12 km |
| 16923 | 5b | -15 to -10°F | 12 km |
| 14754 | 5b | -15 to -10°F | 19 km |
| 16937 | 5b | -15 to -10°F | 25 km |
| 16927 | 5b | -15 to -10°F | 29 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 USC00366649, at 41.9244, -78.0072, elevation 521 m (1,710 ft).
- Data quality: Representative (10+ years), 12 years of freeze data.
- Average days per year at or below 32°F: 175.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Coudersport 1 SW (19 km)
- Coudersport 7se (21 km)
- Port Allegany (26 km)
- Clermont 1 NW (48 km)
- Emporium (50 km)
- Bradford Regional Airport (54 km)
- Wellsboro 4 SW (57 km)
- Stevenson Dam (58 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.