Berwyn, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Berwyn, a community in Chester County, Pennsylvania.
Tonight
58°F
Partly Cloudy
Partly cloudy, with a low around 58. North wind around 5 mph.
7-day forecast for Berwyn
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 58°F | Partly Cloudy | 5 mph N | 0% |
| Saturday | 74°F | Mostly Sunny | 5 to 10 mph E | 2% |
| Saturday Night | 62°F | Mostly Cloudy then Patchy Fog | 5 to 10 mph SE | 20% |
| Sunday | 75°F | Showers And Thunderstorms | 5 to 10 mph S | 82% |
| Sunday Night | 61°F | Showers And Thunderstorms | 5 to 10 mph NW | 83% |
| Monday | 68°F | Chance Rain Showers | 10 mph NE | 43% |
| Monday Night | 57°F | Chance Rain Showers | 5 to 15 mph NE | 32% |
| Tuesday | 63°F | Chance Rain Showers | 10 to 15 mph NE | 36% |
| Tuesday Night | 53°F | Chance Rain Showers | 10 to 15 mph NE | 36% |
| Wednesday | 62°F | Chance Rain Showers | 10 to 15 mph NE | 35% |
| Wednesday Night | 53°F | Chance Showers And Thunderstorms | 10 to 15 mph NE | 38% |
| Thursday | 62°F | Chance Showers And Thunderstorms | 10 to 15 mph NE | 37% |
| Thursday Night | 53°F | Chance Showers And Thunderstorms | 5 to 10 mph NE | 32% |
| Friday | 67°F | Chance Rain Showers | 10 mph N | 25% |
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 Sep 19, 2026.