National Weather Service Forecast for: Chester PA
Issued by: National Weather Service Philadelphia, PA
Updated: 4:12 pm EDT Jul 7, 2025
 
Overnight

Overnight: Mostly clear, with a low around 75. Calm wind.
Mostly Clear

Tuesday

Tuesday: A chance of showers and thunderstorms, mainly after 4pm.  Increasing clouds, with a high near 93. Heat index values as high as 102. West wind around 5 mph.  Chance of precipitation is 30%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunny then
Chance
Showers
Tuesday
Night
Tuesday Night: Showers likely and possibly a thunderstorm before 2am, then a chance of showers.  Mostly cloudy, with a low around 73. West wind around 5 mph becoming calm.  Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Showers
Likely

Wednesday

Wednesday: A chance of showers, with thunderstorms also possible after 2pm.  Partly sunny, with a high near 90. Calm wind becoming southwest around 5 mph in the afternoon.  Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Chance
Showers then
Chance
T-storms
Wednesday
Night
Wednesday Night: A chance of showers and thunderstorms.  Mostly cloudy, with a low around 73. Calm wind.  Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Chance
T-storms then
Chance
Showers
Thursday

Thursday: A chance of showers before 11am, then a chance of showers and thunderstorms between 11am and 2pm, then showers likely and possibly a thunderstorm after 2pm.  Mostly cloudy, with a high near 86. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Showers
Likely

Thursday
Night
Thursday Night: Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am, then a chance of showers after 2am.  Cloudy, with a low around 71. Chance of precipitation is 60%.
Showers
Likely then
Chance
T-storms
Friday

Friday: A chance of showers, with thunderstorms also possible after 2pm.  Mostly cloudy, with a high near 82. Chance of precipitation is 40%.
Chance
Showers then
Chance
T-storms
Friday
Night
Friday Night: A chance of showers and thunderstorms.  Mostly cloudy, with a low around 69. Chance of precipitation is 30%.
Chance
T-storms then
Chance
Showers
Lo 75 °F Hi 93 °F Lo 73 °F Hi 90 °F Lo 73 °F Hi 86 °F Lo 71 °F Hi 82 °F Lo 69 °F

Heat Advisory
Flood Watch
 

Overnight
 
Mostly clear, with a low around 75. Calm wind.
Tuesday
 
A chance of showers and thunderstorms, mainly after 4pm. Increasing clouds, with a high near 93. Heat index values as high as 102. West wind around 5 mph. Chance of precipitation is 30%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tuesday Night
 
Showers likely and possibly a thunderstorm before 2am, then a chance of showers. Mostly cloudy, with a low around 73. West wind around 5 mph becoming calm. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday
 
A chance of showers, with thunderstorms also possible after 2pm. Partly sunny, with a high near 90. Calm wind becoming southwest around 5 mph in the afternoon. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
 
A chance of showers and thunderstorms. Mostly cloudy, with a low around 73. Calm wind. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday
 
A chance of showers before 11am, then a chance of showers and thunderstorms between 11am and 2pm, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 86. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Thursday Night
 
Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am, then a chance of showers after 2am. Cloudy, with a low around 71. Chance of precipitation is 60%.
Friday
 
A chance of showers, with thunderstorms also possible after 2pm. Mostly cloudy, with a high near 82. Chance of precipitation is 40%.
Friday Night
 
A chance of showers and thunderstorms. Mostly cloudy, with a low around 69. Chance of precipitation is 30%.
Saturday
 
A chance of showers, with thunderstorms also possible after 2pm. Mostly cloudy, with a high near 83. Chance of precipitation is 30%.
Saturday Night
 
A chance of showers and thunderstorms. Mostly cloudy, with a low around 68. Chance of precipitation is 30%.
Sunday
 
A chance of showers and thunderstorms. Partly sunny, with a high near 84. Chance of precipitation is 40%.
Sunday Night
 
A chance of showers and thunderstorms. Mostly cloudy, with a low around 70. Chance of precipitation is 30%.
Monday
 
A chance of showers and thunderstorms. Partly sunny, with a high near 86. Chance of precipitation is 30%.

 

Forecast from NOAA-NWS for Chester PA.