Berwyn, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Berwyn, a community in Chester County, Pennsylvania.
Today
85°F
Mostly Sunny
Mostly sunny, with a high near 85. Northeast wind around 5 mph.
7-day forecast for Berwyn
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 85°F | Mostly Sunny | 5 mph NE | 0% |
| Tonight | 66°F | Mostly Cloudy | 0 mph | 7% |
| Wednesday | 84°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 0 to 5 mph SE | 77% |
| Wednesday Night | 71°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 5 mph S | 64% |
| Thursday | 88°F | Mostly Sunny then Chance Showers And Thunderstorms | 5 to 10 mph S | 25% |
| Thursday Night | 73°F | Chance Showers And Thunderstorms | 5 to 10 mph SW | 35% |
| Friday | 89°F | Mostly Sunny then Chance Showers And Thunderstorms | 5 mph SW | 41% |
| Friday Night | 71°F | Chance Showers And Thunderstorms | 5 mph SW | 43% |
| Saturday | 87°F | Partly Sunny then Chance Showers And Thunderstorms | 5 mph W | 38% |
| Saturday Night | 70°F | Chance Showers And Thunderstorms | 5 mph W | 38% |
| Sunday | 88°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 mph W | 15% |
| Sunday Night | 72°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 5 mph SW | 15% |
| Monday | 90°F | Sunny | 5 to 10 mph W | 11% |
| Monday Night | 71°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph W | 18% |
Forecast source: National Weather Service (api.weather.gov) for Berwyn (40.039, -75.442). Updated through the day.
Growing snapshot for Berwyn
Last spring frost
Apr 18
First fall frost
Oct 27
Growing season
192 days
Hardiness zone
7a
More local growing data for Berwyn: nearby ZIP 19312 weather · frost dates · planting calendar · Pennsylvania frost dates
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Climate data from the nearest NOAA station, Phoenixville 1 E, Pa (6.5 mi from Berwyn). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.