Frost dates for Wellsboro 4 SW, PA
At Wellsboro 4 SW, the median last spring frost (32°F) is May 10 and the median first fall frost is Oct 5, for a typical growing season of 148 days. For a 90% chance that the last frost has passed, wait until May 26. Nearby ZIP codes are in USDA hardiness zones 5b to 6a.
- May 10Last spring frost (median)50% chance of 32°F after this date
- May 26Safer planting date10% chance of 32°F after this date
- Oct 5First fall frost (median)50% chance of 32°F by this date
- 148 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 7 | May 23 | Jun 4 |
| 32°F | Apr 25 | May 10 | May 26 |
| 28°F | Apr 14 | Apr 28 | May 15 |
| 24°F | Apr 2 | Apr 15 | May 3 |
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 13 | Sep 26 | Oct 7 |
| 32°F | Sep 23 | Oct 5 | Oct 20 |
| 28°F | Oct 3 | Oct 17 | Nov 2 |
| 24°F | Oct 15 | Nov 1 | Nov 17 |
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 | 107 days | 125 days | 145 days |
| 32°F | 128 days | 148 days | 167 days |
| 28°F | 148 days | 172 days | 193 days |
| 24°F | 174 days | 199 days | 220 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 |
|---|---|---|---|
| 16901 | 6a | -10 to -5°F | 7 km |
| 16921 | 6a | -10 to -5°F | 12 km |
| 16938 | 6a | -10 to -5°F | 12 km |
| 17727 | 6a | -10 to -5°F | 20 km |
| 17769 | 6a | -10 to -5°F | 23 km |
| 16930 | 6a | -10 to -5°F | 24 km |
| 16943 | 5b | -15 to -10°F | 25 km |
| 16950 | 6a | -10 to -5°F | 25 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 USC00369408, at 41.7003, -77.3872, elevation 554 m (1,818 ft).
- Data quality: Representative (10+ years), 25 years of freeze data.
- Average days per year at or below 32°F: 159.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Tioga Hammond Dam (30 km)
- Cowanesque Dam (38 km)
- Canton (45 km)
- Coudersport 7se (49 km)
- Renovo (50 km)
- Coudersport 1 SW (55 km)
- Oswayo 1 ENE (57 km)
- Alvin R Bush Dam (59 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.