Frost dates for Mahanoy City 2 N, PA
At Mahanoy City 2 N, the median last spring frost (32°F) is Apr 30 and the median first fall frost is Oct 22, for a typical growing season of 175 days. For a 90% chance that the last frost has passed, wait until May 18. Nearby ZIP codes are in USDA hardiness zone 6b.
- Apr 30Last spring frost (median)50% chance of 32°F after this date
- May 18Safer planting date10% chance of 32°F after this date
- Oct 22First fall frost (median)50% chance of 32°F by this date
- 175 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 24 | May 11 | May 26 |
| 32°F | Apr 15 | Apr 30 | May 18 |
| 28°F | Apr 2 | Apr 16 | May 6 |
| 24°F | Mar 21 | Apr 3 | Apr 18 |
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 10 | Oct 23 |
| 32°F | Oct 7 | Oct 22 | Nov 3 |
| 28°F | Oct 20 | Nov 1 | Nov 14 |
| 24°F | Nov 1 | Nov 12 | Nov 25 |
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 | 129 days | 151 days | 172 days |
| 32°F | 152 days | 175 days | 195 days |
| 28°F | 175 days | 199 days | 218 days |
| 24°F | 204 days | 222 days | 240 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 |
|---|---|---|---|
| 17948 | 6b | -5 to 0°F | 2 km |
| 18220 | 6b | -5 to 0°F | 5 km |
| 18214 | 6b | -5 to 0°F | 6 km |
| 17976 | 6b | -5 to 0°F | 6 km |
| 17967 | 6b | -5 to 0°F | 7 km |
| 17934 | 6b | -5 to 0°F | 7 km |
| 17931 | 6b | -5 to 0°F | 8 km |
| 18242 | 6b | -5 to 0°F | 8 km |
| 18248 | 6b | -5 to 0°F | 8 km |
| 18237 | 6b | -5 to 0°F | 9 km |
| 18245 | 6b | -5 to 0°F | 10 km |
| 17946 | 6b | -5 to 0°F | 10 km |
| 17925 | 6b | -5 to 0°F | 10 km |
| 17953 | 6b | -5 to 0°F | 10 km |
| 17952 | 6b | -5 to 0°F | 10 km |
| 17959 | 6b | -5 to 0°F | 11 km |
| 17982 | 6b | -5 to 0°F | 12 km |
| 18256 | 6b | -5 to 0°F | 12 km |
| 17985 | 6b | -5 to 0°F | 12 km |
| 17935 | 6b | -5 to 0°F | 12 km |
| 18241 | 6b | -5 to 0°F | 12 km |
| 17970 | 6b | -5 to 0°F | 13 km |
| 18231 | 6b | -5 to 0°F | 14 km |
| 17930 | 6b | -5 to 0°F | 14 km |
| 18246 | 6b | -5 to 0°F | 14 km |
| 17965 | 6b | -5 to 0°F | 15 km |
| 18252 | 6b | -5 to 0°F | 16 km |
| 18202 | 6b | -5 to 0°F | 16 km |
| 18249 | 6b | -5 to 0°F | 17 km |
| 18254 | 6b | -5 to 0°F | 17 km |
| 17954 | 6b | -5 to 0°F | 19 km |
| 18219 | 6b | -5 to 0°F | 19 km |
| 17901 | 6b | -5 to 0°F | 19 km |
| 18230 | 6b | -5 to 0°F | 20 km |
| 18201 | 6b | -5 to 0°F | 21 km |
| 18239 | 6b | -5 to 0°F | 22 km |
| 18635 | 6b | -5 to 0°F | 22 km |
| 17944 | 6b | -5 to 0°F | 23 km |
| 18223 | 6b | -5 to 0°F | 23 km |
| 18234 | 6b | -5 to 0°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 USC00365344, at 40.8344, -76.1436, elevation 521 m (1,710 ft).
- Data quality: Representative (10+ years), 10 years of freeze data.
- Average days per year at or below 32°F: 139.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Bear Gap (30 km)
- Hamburg (34 km)
- Lehighton 1ssw (38 km)
- Francis E Walter Dam (47 km)
- Benton 3 NE (47 km)
- Rodale Rsch Center (47 km)
- Reading 4 NNW (49 km)
- Blue Marsh Lake (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.