Atglen, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Atglen, a borough in Chester County, Pennsylvania.
Tonight
56°F
Partly Cloudy
Partly cloudy, with a low around 56. North wind around 5 mph.
7-day forecast for Atglen
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 56°F | Partly Cloudy | 5 mph N | 0% |
| Saturday | 73°F | Partly Sunny | 5 to 10 mph E | 2% |
| Saturday Night | 62°F | Mostly Cloudy then Patchy Fog | 5 to 10 mph SE | 29% |
| Sunday | 75°F | Showers And Thunderstorms | 10 mph S | 82% |
| Sunday Night | 60°F | Showers And Thunderstorms | 5 to 10 mph NW | 82% |
| Monday | 68°F | Chance Rain Showers | 10 mph NE | 40% |
| Monday Night | 56°F | Chance Rain Showers | 5 to 15 mph NE | 33% |
| Tuesday | 61°F | Chance Rain Showers | 15 mph NE | 43% |
| Tuesday Night | 51°F | Chance Rain Showers | 10 to 15 mph NE | 43% |
| Wednesday | 60°F | Chance Rain Showers | 15 mph NE | 40% |
| Wednesday Night | 51°F | Chance Showers And Thunderstorms | 10 to 15 mph NE | 40% |
| Thursday | 62°F | Chance Showers And Thunderstorms | 10 to 15 mph NE | 40% |
| Thursday Night | 51°F | Chance Showers And Thunderstorms | 5 to 10 mph NE | 35% |
| Friday | 66°F | Chance Rain Showers | 10 mph N | 29% |
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 Sep 19, 2026.