Frost dates for Ford City 4 S Dam, PA
At Ford City 4 S Dam, the median last spring frost (32°F) is May 4 and the median first fall frost is Oct 16, for a typical growing season of 164 days. For a 90% chance that the last frost has passed, wait until May 20. Nearby ZIP codes are in USDA hardiness zones 6a to 6b.
- May 4Last spring frost (median)50% chance of 32°F after this date
- May 20Safer planting date10% chance of 32°F after this date
- Oct 16First fall frost (median)50% chance of 32°F by this date
- 164 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 30 | May 16 | May 31 |
| 32°F | Apr 20 | May 4 | May 20 |
| 28°F | Apr 10 | Apr 23 | May 9 |
| 24°F | Mar 27 | Apr 9 | Apr 21 |
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 22 | Oct 5 | Oct 18 |
| 32°F | Oct 2 | Oct 16 | Oct 30 |
| 28°F | Oct 12 | Oct 28 | Nov 8 |
| 24°F | Oct 24 | 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 | 123 days | 142 days | 163 days |
| 32°F | 143 days | 164 days | 185 days |
| 28°F | 165 days | 187 days | 206 days |
| 24°F | 192 days | 211 days | 230 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 |
|---|---|---|---|
| 16226 | 6b | -5 to 0°F | 2 km |
| 16212 | 6b | -5 to 0°F | 7 km |
| 16236 | 6b | -5 to 0°F | 7 km |
| 15690 | 6b | -5 to 0°F | 9 km |
| 16201 | 6b | -5 to 0°F | 11 km |
| 15736 | 6b | -5 to 0°F | 12 km |
| 15686 | 6b | -5 to 0°F | 13 km |
| 16249 | 6a | -10 to -5°F | 17 km |
| 15774 | 6b | -5 to 0°F | 17 km |
| 16218 | 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 USC00362942, at 40.7150, -79.5133, elevation 284 m (930 ft).
- Data quality: Standard (24+ years of data), 28 years of freeze data.
- Average days per year at or below 32°F: 142.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Schenley Lock 5 (14 km)
- Natrona Lock 4 (21 km)
- Salina 3 W (23 km)
- Loyalhanna Lake (29 km)
- Putneyville 2 SE Dam (30 km)
- Acmetonia Lock 3 (32 km)
- Indiana 3 SE (36 km)
- Butler 2 SW (37 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.