Frost dates for Tionesta 2 SE Lake, PA
At Tionesta 2 SE Lake, the median last spring frost (32°F) is May 1 and the median first fall frost is Oct 25, for a typical growing season of 176 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 1Last spring frost (median)50% chance of 32°F after this date
- May 18Safer planting date10% chance of 32°F after this date
- Oct 25First fall frost (median)50% chance of 32°F by this date
- 176 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 12 | May 27 |
| 32°F | Apr 18 | May 1 | May 18 |
| 28°F | Apr 6 | Apr 20 | May 6 |
| 24°F | Mar 23 | Apr 6 | Apr 19 |
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 | Oct 1 | Oct 12 | Oct 27 |
| 32°F | Oct 8 | Oct 25 | Nov 6 |
| 28°F | Oct 18 | Nov 4 | Nov 18 |
| 24°F | Oct 30 | Nov 15 | Dec 1 |
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 | 134 days | 153 days | 173 days |
| 32°F | 155 days | 176 days | 194 days |
| 28°F | 175 days | 198 days | 219 days |
| 24°F | 199 days | 222 days | 243 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 |
|---|---|---|---|
| 16353 | 6a | -10 to -5°F | 5 km |
| 16370 | 6a | -10 to -5°F | 9 km |
| 16321 | 6a | -10 to -5°F | 11 km |
| 16326 | 6a | -10 to -5°F | 11 km |
| 16341 | 6a | -10 to -5°F | 13 km |
| 16322 | 6a | -10 to -5°F | 15 km |
| 16301 | 6a | -10 to -5°F | 15 km |
| 16364 | 6a | -10 to -5°F | 16 km |
| 16351 | 6a | -10 to -5°F | 23 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 USC00368873, at 41.4792, -79.4433, elevation 366 m (1,200 ft).
- Data quality: Representative (10+ years), 24 years of freeze data.
- Average days per year at or below 32°F: 145.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Cooksburg 2 NW (23 km)
- Titusville Wtr Wks (27 km)
- Clarion 3 SW (32 km)
- Franklin (33 km)
- Warren (48 km)
- Chandlers Valley 1se (52 km)
- Dubois Jefferson Co Airport (56 km)
- Kane 1nne (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.