National Weather Service Forecast for: Chester PA
Issued by: National Weather Service Philadelphia, PA
Updated: 4:08 pm EDT Jul 16, 2026
 
This
Afternoon
This Afternoon: A chance of showers and thunderstorms. Patchy smoke. Sunny, with a high near 94. Heat index values as high as 101. West wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Chance
T-storms
 Tonight

Tonight: A chance of showers and thunderstorms, mainly before 7pm. Widespread smoke, mainly after 10pm. Partly cloudy, with a low around 72. North wind 5 to 10 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Chance
T-storms then
Smoke
 Friday

Friday: Widespread smoke, mainly before 10am. Mostly sunny, with a high near 89. North wind around 5 mph becoming west in the afternoon.
Smoke

 Friday
Night
Friday Night: Patchy smoke before 3am. Partly cloudy, with a low around 72. Calm wind.
Patchy Smoke

 Saturday

Saturday: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 11am. High near 87. South wind 5 to 10 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Showers

 Saturday
Night
Saturday Night: Showers and possibly a thunderstorm before 2am, then a chance of showers and thunderstorms after 2am. Low around 74. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Showers

 Sunday

Sunday: A chance of showers before 8am. Mostly sunny, with a high near 87. Chance of precipitation is 30%.
Chance
Showers then
Mostly Sunny
 Sunday
Night
Sunday Night: Mostly clear, with a low around 66.
Mostly Clear

 Monday

Monday: Sunny, with a high near 86.
Sunny
Hi 94 °F Lo 72 °F Hi 89 °F Lo 72 °F Hi 87 °F Lo 74 °F Hi 87 °F Lo 66 °F Hi 86 °F

Heat Advisory
Air Quality Alert
 

This Afternoon
 
 A chance of showers and thunderstorms. Patchy smoke. Sunny, with a high near 94. Heat index values as high as 101. West wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
 
 A chance of showers and thunderstorms, mainly before 7pm. Widespread smoke, mainly after 10pm. Partly cloudy, with a low around 72. North wind 5 to 10 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday
 
 Widespread smoke, mainly before 10am. Mostly sunny, with a high near 89. North wind around 5 mph becoming west in the afternoon.
Friday Night
 
 Patchy smoke before 3am. Partly cloudy, with a low around 72. Calm wind.
Saturday
 
 A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 11am. High near 87. South wind 5 to 10 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Saturday Night
 
 Showers and possibly a thunderstorm before 2am, then a chance of showers and thunderstorms after 2am. Low around 74. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Sunday
 
 A chance of showers before 8am. Mostly sunny, with a high near 87. Chance of precipitation is 30%.
Sunday Night
 
 Mostly clear, with a low around 66.
Monday
 
 Sunny, with a high near 86.
Monday Night
 
 Partly cloudy, with a low around 69.
Tuesday
 
 A chance of showers. Partly sunny, with a high near 88. Chance of precipitation is 50%.
Tuesday Night
 
 A chance of showers and thunderstorms. Mostly cloudy, with a low around 71. Chance of precipitation is 50%.
Wednesday
 
 A chance of showers. Partly sunny, with a high near 85. Chance of precipitation is 30%.
Wednesday Night
 
 A chance of showers. Partly cloudy, with a low around 67. Chance of precipitation is 30%.
Thursday
 
 Mostly sunny, with a high near 83.

 

Forecast from NOAA-NWS for Chester PA.