Frost dates for Grays Landing, PA
At Grays Landing, the median last spring frost (32°F) is Apr 28 and the median first fall frost is Oct 21, for a typical growing season of 175 days. For a 90% chance that the last frost has passed, wait until May 14. Nearby ZIP codes are in USDA hardiness zones 6b to 7a.
- Apr 28Last spring frost (median)50% chance of 32°F after this date
- May 14Safer planting date10% chance of 32°F after this date
- Oct 21First 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 25 | May 8 | May 23 |
| 32°F | Apr 15 | Apr 28 | May 14 |
| 28°F | Apr 1 | Apr 16 | May 1 |
| 24°F | Mar 19 | Apr 3 | Apr 17 |
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 29 | Oct 11 | Oct 24 |
| 32°F | Oct 9 | Oct 21 | Nov 1 |
| 28°F | Oct 19 | Oct 31 | Nov 12 |
| 24°F | Oct 30 | Nov 10 | Nov 24 |
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 | 135 days | 155 days | 175 days |
| 32°F | 156 days | 175 days | 193 days |
| 28°F | 176 days | 198 days | 217 days |
| 24°F | 204 days | 222 days | 242 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 |
|---|---|---|---|
| 15467 | 6b | -5 to 0°F | 2 km |
| 15460 | 6b | -5 to 0°F | 3 km |
| 15334 | 6b | -5 to 0°F | 5 km |
| 15327 | 6b | -5 to 0°F | 5 km |
| 15315 | 6b | -5 to 0°F | 6 km |
| 15461 | 6b | -5 to 0°F | 6 km |
| 15338 | 6b | -5 to 0°F | 9 km |
| 15476 | 6b | -5 to 0°F | 9 km |
| 15454 | 6b | -5 to 0°F | 10 km |
| 15351 | 7a | 0 to 5°F | 11 km |
| 15320 | 6b | -5 to 0°F | 11 km |
| 15349 | 6b | -5 to 0°F | 14 km |
| 15410 | 7a | 0 to 5°F | 14 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 USC00363451, at 39.7833, -79.9167, elevation 244 m (800 ft).
- Data quality: Representative (10+ years), 19 years of freeze data.
- Average days per year at or below 32°F: 124.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Point Marion Lock 8 (6 km)
- Uniontown 1 NE (22 km)
- Waynesburg 1 E (25 km)
- Chalk Hill 2 ENE (29 km)
- Connellsville 2 SSW (36 km)
- Charleroi Lock 4 (40 km)
- Donora 1 SW (42 km)
- Confluence 1 SW Dam (47 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.