CWS Forecast: Southeast Pennsylvania (Philadelphia)

The week will bring cool temperatures, rain, and strong winds across the Commonwealth. Monday starts the week off with rain showers moving through most of the state around midday, with a second round overnight. Even more steady rain is expected on Tuesday and Wednesday. Below-average temperatures affect the region on the first three days of the week, with highs in the 60’s and lows around 50. Thursday and Friday have clearer conditions with slight chances of pop-up showers and temperatures around the average for this time of year.

Day One: Monday, September 21st, 2026

Fairly overcast skies throughout the day with moderate chance of rain around 7 pm.

High: 70°

Low: 59°

Day Two: Tuesday, September 22nd, 2026

Fairly overcast throughout the day with a very high chance of rain around 11 am.

High: 60°

Low: 57°

Day Three: Wednesday, September 23rd, 2026

Heavy clouds continuing from yesterday with fairly low chances of rain.

High: 62

Day Four: Thursday, September 24th, 2026

Mostly cloudy skies though out the day and night.

High: 62°F 

Low: 52°F

Day Five: Friday, September 25th, 2026

Fairly chilly morning with less clouds than the past few days throughout the day and night. Low chances of precipitation.

High: 68°F

Low: 53°F

Last Updated on September 20, 2026 at 10:49 pm