Pennwyn, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Pennwyn, a community in Berks County, Pennsylvania.
Overnight
62°F
Mostly Cloudy
Mostly cloudy, with a low around 62. North wind around 0 mph.
7-day forecast for Pennwyn
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 62°F | Mostly Cloudy | 0 mph | 0% |
| Tuesday | 84°F | Mostly Sunny | 0 mph | 0% |
| Tuesday Night | 66°F | Mostly Cloudy | 0 to 5 mph E | 3% |
| Wednesday | 83°F | Showers And Thunderstorms Likely | 0 to 5 mph E | 64% |
| Wednesday Night | 71°F | Chance Showers And Thunderstorms | 0 to 5 mph SE | 41% |
| Thursday | 88°F | Partly Sunny then Showers And Thunderstorms Likely | 5 to 10 mph S | 66% |
| Thursday Night | 72°F | Showers And Thunderstorms Likely | 0 to 10 mph SW | 66% |
| Friday | 88°F | Mostly Sunny then Showers And Thunderstorms Likely | 0 to 5 mph SW | 59% |
| Friday Night | 71°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 0 to 5 mph SW | 59% |
| Saturday | 86°F | Partly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph W | 48% |
| Saturday Night | 70°F | Chance Showers And Thunderstorms | 0 to 5 mph SW | 48% |
| Sunday | 87°F | Mostly Sunny | 0 to 5 mph W | 12% |
| Sunday Night | 71°F | Partly Cloudy | 0 to 5 mph SW | 12% |
| Monday | 89°F | Sunny then Slight Chance Showers And Thunderstorms | 0 to 10 mph W | 18% |
Forecast source: National Weather Service (api.weather.gov) for Pennwyn (40.289, -75.974). Updated through the day.
Growing snapshot for Pennwyn
Last spring frost
Apr 14
First fall frost
Oct 29
Growing season
197 days
Hardiness zone
7a
More local growing data for Pennwyn: nearby ZIP 19607 weather · frost dates · planting calendar · Pennsylvania frost dates
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Climate data from the nearest NOAA station, Reading Spaatz Fld, Pa (5.3 mi from Pennwyn). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.