Pennwyn, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Pennwyn, a community in Berks County, Pennsylvania.
This Afternoon
74°F
Mostly Sunny
Mostly sunny, with a high near 74. East wind around 5 mph.
7-day forecast for Pennwyn
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 74°F | Mostly Sunny | 5 mph E | 2% |
| Tonight | 59°F | Mostly Cloudy then Chance Rain Showers | 5 to 10 mph SE | 30% |
| Sunday | 74°F | Rain Showers | 5 to 10 mph S | 76% |
| Sunday Night | 56°F | Showers And Thunderstorms | 5 to 10 mph NW | 91% |
| Monday | 69°F | Slight Chance Rain Showers | 10 mph NE | 24% |
| Monday Night | 50°F | Chance Rain Showers | 10 to 15 mph NE | 37% |
| Tuesday | 61°F | Chance Rain Showers | 15 mph NE | 42% |
| Tuesday Night | 49°F | Chance Rain Showers | 15 mph NE | 37% |
| Wednesday | 61°F | Chance Rain Showers | 15 mph NE | 34% |
| Wednesday Night | 49°F | Chance Rain Showers | 15 mph NE | 33% |
| Thursday | 62°F | Chance Rain Showers | 15 mph NE | 34% |
| Thursday Night | 49°F | Chance Rain Showers | 10 to 15 mph NE | 30% |
| Friday | 65°F | Slight Chance Rain Showers | 10 to 15 mph N | 22% |
| Friday Night | 49°F | Slight Chance Rain Showers | 10 to 15 mph N | 22% |
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 Sep 19, 2026.