Frost dates for Coatesville 2 W, PA
At Coatesville 2 W, the median last spring frost (32°F) is Apr 19 and the median first fall frost is Oct 25, for a typical growing season of 190 days. For a 90% chance that the last frost has passed, wait until May 4. Nearby ZIP codes are in USDA hardiness zone 7a.
- Apr 19Last spring frost (median)50% chance of 32°F after this date
- May 4Safer planting date10% chance of 32°F after this date
- Oct 25First fall frost (median)50% chance of 32°F by this date
- 190 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 18 | May 1 | May 17 |
| 32°F | Apr 3 | Apr 19 | May 4 |
| 28°F | Mar 19 | Apr 3 | Apr 18 |
| 24°F | Mar 6 | Mar 22 | Apr 4 |
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 | Oct 1 | Oct 13 | Oct 26 |
| 32°F | Oct 11 | Oct 25 | Nov 7 |
| 28°F | Oct 24 | Nov 6 | Nov 21 |
| 24°F | Nov 4 | Nov 19 | Dec 5 |
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 | 146 days | 165 days | 183 days |
| 32°F | 169 days | 190 days | 208 days |
| 28°F | 198 days | 216 days | 236 days |
| 24°F | 222 days | 241 days | 263 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 |
|---|---|---|---|
| 19369 | 7a | 0 to 5°F | 3 km |
| 19367 | 7a | 0 to 5°F | 3 km |
| 19320 | 7a | 0 to 5°F | 3 km |
| 19358 | 7a | 0 to 5°F | 5 km |
| 19365 | 7a | 0 to 5°F | 6 km |
| 19316 | 7a | 0 to 5°F | 8 km |
| 19372 | 7a | 0 to 5°F | 9 km |
| 19310 | 7a | 0 to 5°F | 11 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 USC00361591, at 39.9847, -75.8600, elevation 195 m (640 ft).
- Data quality: Representative (10+ years), 17 years of freeze data.
- Average days per year at or below 32°F: 120.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Avondale 2 N (15 km)
- Glenmoore (15 km)
- W Chester 2 NW (19 km)
- Hopewell Morgantown (20 km)
- New Holland 2 SE (21 km)
- Octoraro Lake (26 km)
- Phoenixville 1 E (35 km)
- Lancaster 2ne Fltr Plant (36 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.