Berwyn, PA Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Berwyn, a community in Chester County, Pennsylvania.

Tonight

50°F

Partly Cloudy

Partly cloudy, with a low around 50. South wind around 5 mph.

7-day forecast for Berwyn

When	Temp	Forecast	Wind	Precip
Tonight	50°F	Partly Cloudy	5 mph S	2%
Wednesday	73°F	Patchy Fog then Sunny	5 to 10 mph S	3%
Wednesday Night	59°F	Mostly Cloudy	5 mph S	7%
Thursday	72°F	Chance Light Rain	5 to 10 mph S	50%
Thursday Night	61°F	Light Rain	5 mph SW	76%
Friday	68°F	Light Rain	5 mph W	76%
Friday Night	51°F	Light Rain Likely	0 to 5 mph NW	74%
Saturday	64°F	Chance Light Rain	5 to 10 mph NW	32%
Saturday Night	42°F	Slight Chance Light Rain then Partly Cloudy	5 to 10 mph NW	15%
Sunday	59°F	Mostly Sunny	5 to 10 mph NW	8%
Sunday Night	40°F	Slight Chance Light Rain	5 to 10 mph W	19%
Monday	59°F	Slight Chance Light Rain	10 to 15 mph NW	22%
Monday Night	40°F	Slight Chance Light Rain	5 to 10 mph W	22%
Tuesday	61°F	Sunny	10 to 15 mph W	14%

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

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 Nov 4, 2026.