Penn, PA Weather & Growing Conditions
This Afternoon
78°F
Partly Sunny
Partly sunny, with a high near 78. Southeast wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 78°F | Partly Sunny | 5 mph SE | 5% |
| Tonight | 64°F | Showers And Thunderstorms | 5 to 8 mph SE | 85% |
| Sunday | 77°F | Showers And Thunderstorms | 8 to 13 mph SW | 95% |
| Sunday Night | 54°F | Chance Showers And Thunderstorms | 10 mph N | 53% |
| Monday | 68°F | Chance Rain Showers | 13 mph NE | 39% |
| Monday Night | 53°F | Showers And Thunderstorms Likely | 13 mph E | 65% |
| Tuesday | 63°F | Rain Showers Likely | 13 to 17 mph E | 68% |
| Tuesday Night | 50°F | Rain Showers Likely | 18 mph E | 71% |
| Wednesday | 61°F | Rain Showers Likely | 20 mph E | 71% |
| Wednesday Night | 50°F | Chance Rain Showers | 12 to 17 mph E | 47% |
| Thursday | 66°F | Chance Rain Showers | 14 mph E | 47% |
| Thursday Night | 49°F | Slight Chance Rain Showers | 5 to 12 mph E | 16% |
| Friday | 68°F | Slight Chance Rain Showers | 5 to 10 mph NE | 16% |
| Friday Night | 48°F | Partly Cloudy | 5 to 10 mph NE | 13% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Penn, PA
Last spring frost
Apr 22
First fall frost
Oct 25
Growing season
186 days
Hardiness zone
6b
Explore more for Penn, PA: full frost dates · planting calendar · Pennsylvania frost dates
Climate data from the nearest NOAA station, Murrysville 2 Sw, Pa (7 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.