National Weather Service Forecast for: Norristown 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 3pm. Some of the storms could be severe and produce heavy rainfall. High near 82. East wind 5 to 10 mph becoming south in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
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 66. Southeast wind 5 to 10 mph becoming west 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 slight chance of showers. Cloudy, then gradually becoming mostly sunny, with a high near 79. North wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Slight Chance
Showers

 Tuesday
Night
Tuesday Night: Mostly clear, with a low around 60. Northwest wind around 10 mph.
Mostly Clear

 Wednesday

Wednesday: Sunny, with a high near 83. Northwest wind 5 to 10 mph.
Sunny

 Wednesday
Night
Wednesday Night: Mostly clear, with a low around 62.
Mostly Clear

 Thursday

Thursday: A chance of showers after 2pm. Mostly sunny, with a high near 88. Chance of precipitation is 30%.
Mostly Sunny
then Chance
Showers
 Thursday
Night
Thursday Night: A chance of showers before 8pm, then a chance of showers and thunderstorms between 8pm and 2am, then showers likely after 2am. Mostly cloudy, with a low around 65. Chance of precipitation is 60%.
Chance
T-storms then
Showers
Likely
 Friday

Friday: Showers likely, with thunderstorms also possible after 2pm. Partly sunny, with a high near 85. Chance of precipitation is 60%.
Showers
Likely then
Chance
T-storms
Hi 82 °F Lo 66 °F Hi 79 °F Lo 60 °F Hi 83 °F Lo 62 °F Hi 88 °F Lo 65 °F Hi 85 °F

Flood Watch
 

Today
 
 A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 3pm. Some of the storms could be severe and produce heavy rainfall. High near 82. East wind 5 to 10 mph becoming south in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
Tonight
 
 Showers and thunderstorms before 2am, then showers likely. Some of the storms could be severe and produce heavy rainfall. Low around 66. Southeast wind 5 to 10 mph becoming west after midnight. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday
 
 A slight chance of showers. Cloudy, then gradually becoming mostly sunny, with a high near 79. North wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Tuesday Night
 
 Mostly clear, with a low around 60. Northwest wind around 10 mph.
Wednesday
 
 Sunny, with a high near 83. Northwest wind 5 to 10 mph.
Wednesday Night
 
 Mostly clear, with a low around 62.
Thursday
 
 A chance of showers after 2pm. Mostly sunny, with a high near 88. Chance of precipitation is 30%.
Thursday Night
 
 A chance of showers before 8pm, then a chance of showers and thunderstorms between 8pm and 2am, then showers likely after 2am. Mostly cloudy, with a low around 65. Chance of precipitation is 60%.
Friday
 
 Showers likely, with thunderstorms also possible after 2pm. Partly sunny, with a high near 85. Chance of precipitation is 60%.
Friday Night
 
 A chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 65. Chance of precipitation is 30%.
Saturday
 
 Mostly sunny, with a high near 84.
Saturday Night
 
 Partly cloudy, with a low around 65.
Sunday
 
 Mostly sunny, with a high near 86.

 

Forecast from NOAA-NWS for Norristown PA.