Frost dates for Laurel Mountain, PA
At Laurel Mountain, the median last spring frost (32°F) is Apr 26 and the median first fall frost is Oct 17, for a typical growing season of 172 days. For a 90% chance that the last frost has passed, wait until May 13. Nearby ZIP codes are in USDA hardiness zones 6a to 6b.
- Apr 26Last spring frost (median)50% chance of 32°F after this date
- May 13Safer planting date10% chance of 32°F after this date
- Oct 17First fall frost (median)50% chance of 32°F by this date
- 172 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 23 | May 7 | May 23 |
| 32°F | Apr 13 | Apr 26 | May 13 |
| 28°F | Apr 2 | Apr 16 | Apr 30 |
| 24°F | Mar 22 | 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 | Sep 23 | Oct 5 | Oct 18 |
| 32°F | Oct 4 | Oct 17 | Oct 29 |
| 28°F | Oct 15 | Oct 29 | Nov 14 |
| 24°F | Oct 31 | Nov 11 | Nov 29 |
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 | 131 days | 150 days | 168 days |
| 32°F | 153 days | 172 days | 190 days |
| 28°F | 176 days | 196 days | 216 days |
| 24°F | 200 days | 220 days | 241 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 |
|---|---|---|---|
| 15655 | 6a | -10 to -5°F | 1 km |
| 15658 | 6a | -10 to -5°F | 8 km |
| 15923 | 6b | -5 to 0°F | 17 km |
| 15944 | 6b | -5 to 0°F | 20 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 USC00364836, at 40.2003, -79.1883, elevation 841 m (2,760 ft).
- Data quality: Representative (10+ years), 13 years of freeze data.
- Average days per year at or below 32°F: 126.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Laurel Summit (5 km)
- Rector 3 SSW (8 km)
- Hidden Valley (19 km)
- Donegal 2 NW (20 km)
- Mount Pleasant (26 km)
- Johnstown Cambria Co Airport (33 km)
- Loyalhanna Lake (36 km)
- Connellsville 2 SSW (41 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.