CWS Forecast: Northwest Pennsylvania

Unseasonably warm temperatures are expected across the Commonwealth on Thursday, with highs reaching the upper 70’s to low 80’s along with a chance of showers and thunderstorms throughout the day. Friday will remain warm with partly cloudy skies before temperatures begin to cool heading into the weekend. Saturday looks favorable for daytime tailgating, with mostly cloudy skies and temperatures near 70. Rain and thunderstorms are expected to move into the area Sunday morning, with heavy rain possible as the system passes through. Temperatures will then fall into the 60s, with mostly cloudy skies and scattered showers continuing through Monday and Tuesday. Wednesday will bring more cloudy conditions, with temperatures near 60 and a continued chance of morning rain.

Day One: Thursday, September 17th 2026

Warmer than average temperatures with thunderstorms possible early. Otherwise, mostly cloudy.

  High: 77°F

Low: 63°F

Day Two: Friday, September 18th 2026

Partly cloudy skies throughout the day will give way to clouds late.

High: 71°F

Low: 58°F

Day Three: Saturday, September 19th 2026

Cloudy skies will give way to rainy conditions.

High: 72°F

Low: 63°F 

Day Four: Sunday, September 20th 2026

Cooler, with periods of moderate to heavy rain expected during the day and overcast skies overnight.

High: 69°F

Low: 57°F 

Day Five: Monday, September 21st 2026

Mostly cloudy skies early, with rain showers possible late.

High: 68°F

Low: 56°F

Last Updated on September 16, 2026 at 10:59 pm