NWS Forecast for Chester PA

National Weather Service Forecast for: Chester PA
Issued by: National Weather Service Philadelphia, PA

Updated: 4:08 am EDT Jun 30, 2026

Today Mostly Sunny	Tonight Partly Cloudy	Wednesday Mostly Sunny then Slight Chance T-storms	Wednesday Night Mostly Clear	Thursday Hot	Thursday Night Clear	Friday Hot	Friday Night Partly Cloudy	Independence Day Sunny then Chance T-storms
Hi 91 °F	Lo 71 °F	Hi 97 °F	Lo 76 °F	Hi 102 °F	Lo 80 °F	Hi 103 °F	Lo 78 °F	Hi 101 °F

Air Quality Alert
Extreme Heat Warning

Today	Mostly sunny, with a high near 91. Light southwest wind increasing to 5 to 10 mph in the morning.
Tonight	Partly cloudy, with a low around 71. Southwest wind 5 to 10 mph.
Wednesday	A slight chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 97. Heat index values as high as 104. Southwest wind around 10 mph. Chance of precipitation is 20%.
Wednesday Night	Mostly clear, with a low around 76. Southwest wind 5 to 10 mph.
Thursday	Sunny and hot, with a high near 102. West wind around 5 mph.
Thursday Night	Clear, with a low around 80.
Friday	Sunny and hot, with a high near 103.
Friday Night	Partly cloudy, with a low around 78.
Independence Day	A chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 101. Chance of precipitation is 30%.
Saturday Night	A chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 75. Chance of precipitation is 40%.
Sunday	A chance of showers and thunderstorms. Mostly sunny, with a high near 95. Chance of precipitation is 30%.
Sunday Night	A chance of showers and thunderstorms. Mostly cloudy, with a low around 73. Chance of precipitation is 40%.
Monday	A chance of showers and thunderstorms. Partly sunny, with a high near 91. Chance of precipitation is 40%.

Forecast from NOAA-NWS for Chester PA.