Penn Wynne, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Penn Wynne, a community in Montgomery County, Pennsylvania.
Today
86°F
Mostly Sunny
Mostly sunny, with a high near 86. Northeast wind 0 to 5 mph.
7-day forecast for Penn Wynne
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 86°F | Mostly Sunny | 0 to 5 mph NE | 0% |
| Tonight | 68°F | Mostly Cloudy | 0 to 5 mph E | 6% |
| Wednesday | 85°F | Chance Showers And Thunderstorms | 0 to 5 mph SE | 71% |
| Wednesday Night | 72°F | Showers And Thunderstorms Likely | 5 mph S | 73% |
| Thursday | 89°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 to 10 mph SW | 23% |
| Thursday Night | 73°F | Chance Showers And Thunderstorms | 5 to 10 mph SW | 30% |
| Friday | 90°F | Mostly Sunny then Chance Showers And Thunderstorms | 5 to 10 mph SW | 39% |
| Friday Night | 72°F | Chance Showers And Thunderstorms | 5 mph SW | 44% |
| Saturday | 88°F | Partly Sunny then Chance Showers And Thunderstorms | 5 mph SW | 37% |
| Saturday Night | 71°F | Chance Showers And Thunderstorms | 5 mph W | 37% |
| Sunday | 89°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 mph W | 16% |
| Sunday Night | 72°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 5 mph SW | 16% |
| Monday | 90°F | Sunny | 5 to 10 mph W | 10% |
| Monday Night | 72°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph W | 16% |
Forecast source: National Weather Service (api.weather.gov) for Penn Wynne (39.987, -75.271). Updated through the day.
Growing snapshot for Penn Wynne
Last spring frost
Mar 30
First fall frost
Nov 17
Growing season
232 days
Hardiness zone
7b
More local growing data for Penn Wynne: nearby ZIP 19096 weather · frost dates · planting calendar · Pennsylvania frost dates
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Climate data from the nearest NOAA station, Phila Franklin Inst, Pa (6 mi from Penn Wynne). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.