Frost dates for Putneyville 2 SE Dam, PA
At Putneyville 2 SE Dam, the median last spring frost (32°F) is May 10 and the median first fall frost is Oct 12, for a typical growing season of 155 days. For a 90% chance that the last frost has passed, wait until May 28. Nearby ZIP codes are in USDA hardiness zones 6a to 6b.
- May 10Last spring frost (median)50% chance of 32°F after this date
- May 28Safer planting date10% chance of 32°F after this date
- Oct 12First fall frost (median)50% chance of 32°F by this date
- 155 daysGrowing season (median)between 32°F freezes
USDA hardiness zone 6a (-10 to -5°F) · see all zone 6a frost dates
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 2 | May 21 | Jun 4 |
| 32°F | Apr 24 | May 10 | May 28 |
| 28°F | Apr 15 | Apr 28 | May 19 |
| 24°F | Apr 1 | Apr 16 | 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 18 | Oct 1 | Oct 14 |
| 32°F | Sep 30 | Oct 12 | Oct 27 |
| 28°F | Oct 10 | Oct 26 | Nov 8 |
| 24°F | Oct 22 | Nov 6 | Nov 20 |
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 | 112 days | 133 days | 156 days |
| 32°F | 131 days | 155 days | 177 days |
| 28°F | 154 days | 178 days | 199 days |
| 24°F | 178 days | 203 days | 225 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 |
|---|---|---|---|
| 16222 | 6a | -10 to -5°F | 6 km |
| 16253 | 6b | -5 to 0°F | 6 km |
| 16245 | 6a | -10 to -5°F | 9 km |
| 15778 | 6a | -10 to -5°F | 9 km |
| 16223 | 6a | -10 to -5°F | 9 km |
| 16242 | 6a | -10 to -5°F | 10 km |
| 16230 | 6a | -10 to -5°F | 11 km |
| 15763 | 6a | -10 to -5°F | 13 km |
| 16240 | 6a | -10 to -5°F | 13 km |
| 16244 | 6a | -10 to -5°F | 13 km |
| 16259 | 6b | -5 to 0°F | 14 km |
| 16263 | 6a | -10 to -5°F | 15 km |
| 16256 | 6a | -10 to -5°F | 15 km |
| 15770 | 6a | -10 to -5°F | 15 km |
| 16224 | 6a | -10 to -5°F | 16 km |
| 16211 | 6a | -10 to -5°F | 16 km |
| 15784 | 6a | -10 to -5°F | 16 km |
| 16250 | 6a | -10 to -5°F | 17 km |
| 16246 | 6a | -10 to -5°F | 17 km |
| 15776 | 6a | -10 to -5°F | 17 km |
| 15744 | 6a | -10 to -5°F | 18 km |
| 16210 | 6b | -5 to 0°F | 20 km |
| 15780 | 6a | -10 to -5°F | 20 km |
| 15730 | 6a | -10 to -5°F | 20 km |
| 15864 | 6a | -10 to -5°F | 21 km |
| 15764 | 6a | -10 to -5°F | 23 km |
| 15771 | 6a | -10 to -5°F | 27 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 USC00367229, at 40.9247, -79.2825, elevation 390 m (1,280 ft).
- Data quality: Representative (10+ years), 26 years of freeze data.
- Average days per year at or below 32°F: 152.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Ford City 4 S Dam (30 km)
- Clarion 3 SW (32 km)
- Indiana 3 SE (39 km)
- Schenley Lock 5 (42 km)
- Dubois Jefferson Co Airport (43 km)
- Cooksburg 2 NW (48 km)
- Natrona Lock 4 (50 km)
- Salina 3 W (51 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.