Atglen, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Atglen, a borough in Chester County, Pennsylvania.
Today
83°F
Mostly Sunny
Mostly sunny, with a high near 83. East wind around 5 mph.
7-day forecast for Atglen
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 83°F | Mostly Sunny | 5 mph E | 0% |
| Tonight | 65°F | Mostly Cloudy | 0 mph | 10% |
| Wednesday | 82°F | Showers And Thunderstorms Likely | 0 to 5 mph SE | 77% |
| Wednesday Night | 70°F | Chance Showers And Thunderstorms | 5 mph S | 43% |
| Thursday | 87°F | Mostly Sunny then Chance Showers And Thunderstorms | 5 to 10 mph S | 42% |
| Thursday Night | 70°F | Chance Showers And Thunderstorms | 5 to 10 mph SW | 45% |
| Friday | 87°F | Mostly Sunny then Showers And Thunderstorms Likely | 5 mph SW | 55% |
| Friday Night | 69°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 0 to 5 mph SW | 55% |
| Saturday | 85°F | Partly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph W | 44% |
| Saturday Night | 68°F | Chance Showers And Thunderstorms | 0 to 5 mph SW | 44% |
| Sunday | 86°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 0 to 5 mph W | 15% |
| Sunday Night | 69°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph SW | 15% |
| Monday | 88°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 0 to 10 mph W | 21% |
| Monday Night | 68°F | Slight Chance Showers And Thunderstorms | 5 mph W | 21% |
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 Aug 4, 2026.