Atglen, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Atglen, a borough in Chester County, Pennsylvania.
Overnight
50°F
Mostly Clear
Mostly clear, with a low around 50. South wind around 5 mph.
7-day forecast for Atglen
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 50°F | Mostly Clear | 5 mph S | 2% |
| Wednesday | 72°F | Mostly Sunny | 5 to 10 mph S | 5% |
| Wednesday Night | 58°F | Mostly Cloudy | 5 to 10 mph S | 14% |
| Thursday | 70°F | Light Rain Likely | 5 to 10 mph S | 61% |
| Thursday Night | 60°F | Light Rain Likely | 0 to 5 mph SW | 72% |
| Friday | 67°F | Light Rain Likely | 0 to 5 mph NW | 72% |
| Friday Night | 49°F | Light Rain Likely | 0 to 5 mph NW | 64% |
| Saturday | 62°F | Slight Chance Light Rain | 5 to 10 mph NW | 17% |
| Saturday Night | 39°F | Slight Chance Light Rain then Partly Cloudy | 5 to 10 mph NW | 16% |
| Sunday | 58°F | Mostly Sunny | 5 to 10 mph NW | 7% |
| Sunday Night | 38°F | Slight Chance Light Rain | 5 mph W | 20% |
| Monday | 58°F | Slight Chance Light Rain | 10 to 15 mph NW | 21% |
| Monday Night | 38°F | Slight Chance Light Rain | 5 to 10 mph W | 18% |
| Tuesday | 61°F | Sunny | 5 to 15 mph W | 14% |
Forecast source: National Weather Service (api.weather.gov) for Atglen (39.948, -75.975). Updated through the day.
Growing snapshot for Atglen
Last spring frost
Apr 19
First fall frost
Oct 25
Growing season
190 days
Hardiness zone
7a
More local growing data for Atglen: nearby ZIP 19310 weather · frost dates · planting calendar · Pennsylvania frost dates
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Climate data from the nearest NOAA station, Coatesville 2 W, Pa (6.9 mi from Atglen). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.