Penn, PA Weather & Growing Conditions
This Afternoon
77°F
Sunny
Sunny, with a high near 77. Wind around 0 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 77°F | Sunny | 0 mph | 1% |
| Tonight | 51°F | Mostly Clear | 6 mph SE | 2% |
| Wednesday | 78°F | Partly Sunny | 2 to 9 mph S | 6% |
| Wednesday Night | 61°F | Light Rain | 10 mph S | 99% |
| Thursday | 71°F | Chance Light Rain | 8 to 15 mph SW | 52% |
| Thursday Night | 49°F | Partly Cloudy | 1 to 7 mph SW | 10% |
| Friday | 66°F | Partly Sunny | 1 to 8 mph W | 13% |
| Friday Night | 44°F | Chance Light Rain | 2 to 7 mph NW | 29% |
| Saturday | 56°F | Chance Light Rain | 7 to 14 mph W | 30% |
| Saturday Night | 36°F | Slight Chance Light Rain | 3 to 10 mph W | 24% |
| Sunday | 55°F | Partly Sunny then Slight Chance Light Rain | 5 to 14 mph SW | 18% |
| Sunday Night | 35°F | Slight Chance Light Rain | 9 to 13 mph W | 23% |
| Monday | 56°F | Chance Light Rain | 13 to 20 mph W | 32% |
| Monday Night | 35°F | Chance Light Rain | 12 to 16 mph SW | 32% |
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 Nov 4, 2026.