Frost dates for Selinsgrove 2 S, PA
At Selinsgrove 2 S, the median last spring frost (32°F) is Apr 25 and the median first fall frost is Oct 22, for a typical growing season of 178 days. For a 90% chance that the last frost has passed, wait until May 10. Nearby ZIP codes are in USDA hardiness zone 6b.
- Apr 25Last spring frost (median)50% chance of 32°F after this date
- May 10Safer planting date10% chance of 32°F after this date
- Oct 22First fall frost (median)50% chance of 32°F by this date
- 178 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 22 | May 6 | May 22 |
| 32°F | Apr 9 | Apr 25 | May 10 |
| 28°F | Mar 28 | Apr 10 | Apr 25 |
| 24°F | Mar 16 | Mar 31 | Apr 12 |
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 28 | Oct 9 | Oct 23 |
| 32°F | Oct 7 | Oct 22 | Nov 3 |
| 28°F | Oct 18 | Nov 1 | Nov 13 |
| 24°F | Oct 31 | Nov 11 | Nov 26 |
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 | 136 days | 154 days | 176 days |
| 32°F | 156 days | 178 days | 198 days |
| 28°F | 182 days | 203 days | 222 days |
| 24°F | 208 days | 226 days | 244 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 |
|---|---|---|---|
| 17823 | 6b | -5 to 0°F | 8 km |
| 17864 | 6b | -5 to 0°F | 9 km |
| 17827 | 6b | -5 to 0°F | 10 km |
| 17830 | 6b | -5 to 0°F | 12 km |
| 17867 | 6b | -5 to 0°F | 16 km |
| 17853 | 6b | -5 to 0°F | 16 km |
| 17080 | 6b | -5 to 0°F | 17 km |
| 17017 | 6b | -5 to 0°F | 18 km |
| 17861 | 6b | -5 to 0°F | 18 km |
| 17045 | 6b | -5 to 0°F | 24 km |
| 17086 | 6b | -5 to 0°F | 24 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 USC00367931, at 40.7831, -76.8617, elevation 128 m (420 ft).
- Data quality: Standard (24+ years of data), 30 years of freeze data.
- Average days per year at or below 32°F: 131.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Selinsgrove Penn Valley Airport (4 km)
- Sunbury (10 km)
- Lewisburg (18 km)
- Bear Gap (31 km)
- Laurelton Center (32 km)
- Dehart Dam (37 km)
- Williamsport (51 km)
- Williamsport 2 (53 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.