National Weather Service Forecast for: Chester PA
Issued by: National Weather Service Philadelphia, PA
Updated: 4:07 am EDT Jun 22, 2026
 
Today

Today: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 4pm. Some of the storms could be severe and produce heavy rainfall. High near 84. East wind 5 to 15 mph becoming south in the afternoon. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Slight Chance
Showers then
Severe
T-Storms
 Tonight

Tonight: Showers and thunderstorms before 2am, then showers likely. Some of the storms could be severe and produce heavy rainfall. Low around 68. Southeast wind 5 to 10 mph becoming southwest after midnight. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Severe
T-Storms
then Heavy
Rain
 Tuesday

Tuesday: A chance of showers after 11am. Cloudy, then gradually becoming mostly sunny, with a high near 80. North wind 10 to 15 mph. Chance of precipitation is 40%. New precipitation amounts between a quarter and half of an inch possible.
Chance
Showers

 Tuesday
Night
Tuesday Night: Mostly clear, with a low around 63. Northwest wind around 10 mph, with gusts as high as 20 mph.
Mostly Clear

 Wednesday

Wednesday: Sunny, with a high near 84. Northwest wind 5 to 10 mph.
Sunny

 Wednesday
Night
Wednesday Night: Mostly clear, with a low around 63.
Mostly Clear

 Thursday

Thursday: Mostly sunny, with a high near 89.
Mostly Sunny

 Thursday
Night
Thursday Night: A chance of showers and thunderstorms between 8pm and 2am, then a chance of showers after 2am. Mostly cloudy, with a low around 67. Chance of precipitation is 40%.
Chance
T-storms

 Friday

Friday: A chance of showers, with thunderstorms also possible after 2pm. Partly sunny, with a high near 87. Chance of precipitation is 50%.
Chance
Showers then
Chance
T-storms
Hi 84 °F Lo 68 °F Hi 80 °F Lo 63 °F Hi 84 °F Lo 63 °F Hi 89 °F Lo 67 °F Hi 87 °F

Flood Watch
 

Today
 
 A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 4pm. Some of the storms could be severe and produce heavy rainfall. High near 84. East wind 5 to 15 mph becoming south in the afternoon. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tonight
 
 Showers and thunderstorms before 2am, then showers likely. Some of the storms could be severe and produce heavy rainfall. Low around 68. Southeast wind 5 to 10 mph becoming southwest after midnight. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday
 
 A chance of showers after 11am. Cloudy, then gradually becoming mostly sunny, with a high near 80. North wind 10 to 15 mph. Chance of precipitation is 40%. New precipitation amounts between a quarter and half of an inch possible.
Tuesday Night
 
 Mostly clear, with a low around 63. Northwest wind around 10 mph, with gusts as high as 20 mph.
Wednesday
 
 Sunny, with a high near 84. Northwest wind 5 to 10 mph.
Wednesday Night
 
 Mostly clear, with a low around 63.
Thursday
 
 Mostly sunny, with a high near 89.
Thursday Night
 
 A chance of showers and thunderstorms between 8pm and 2am, then a chance of showers after 2am. Mostly cloudy, with a low around 67. Chance of precipitation is 40%.
Friday
 
 A chance of showers, with thunderstorms also possible after 2pm. Partly sunny, with a high near 87. Chance of precipitation is 50%.
Friday Night
 
 A chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 67. Chance of precipitation is 40%.
Saturday
 
 A chance of showers. Partly sunny, with a high near 85. Chance of precipitation is 30%.
Saturday Night
 
 A chance of showers. Partly cloudy, with a low around 67. Chance of precipitation is 30%.
Sunday
 
 Mostly sunny, with a high near 86.

 

Forecast from NOAA-NWS for Chester PA.