National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Dangerous Heat over the South-Central and Southwest U.S. Through Next Week

Dangerous heat persists across the Desert Southwest through this weekend and across the Southern Plains and Lower Mississippi Valley through at least the middle of next week. Numerous daily record high temperatures are expected through at least Tuesday for much of Texas and Oklahoma as well as portions of Louisiana, New Mexico, and Arizona. Read More >

Current conditions at

Philadelphia - Wings Field Airport (KLOM)

Lat: 40.14°NLon: 75.27°WElev: 282ft.

Fair

66°F

19°C

Humidity 99%
Wind Speed Calm
Barometer 30.05 in
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Last update 22 Aug 3:55 am EDT
Extended Forecast for

Norristown PA

  • Today

    Today: A chance of showers, mainly after 8am. Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 77. Calm wind becoming southeast around 5 mph in the morning. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.

    High: 77 °F

    Chance
    Showers and
    Patchy Fog

  • Tonight

    Tonight: Showers and thunderstorms likely. Patchy fog after 9pm. Otherwise, mostly cloudy, with a low around 67. East wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 67 °F

    Showers
    Likely and
    Patchy Fog

  • Sunday

    Sunday: A chance of showers, mainly before 7am. Patchy fog before 10am. Otherwise, mostly sunny, with a high near 82. West wind 5 to 10 mph. Chance of precipitation is 30%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 82 °F

    Chance
    Showers and
    Patchy Fog
    then Mostly
    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 62. West wind around 5 mph becoming calm in the evening.

    Low: 62 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 80. West wind 5 to 10 mph.

    High: 80 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 60.

    Low: 60 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 81.

    High: 81 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 62.

    Low: 62 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 85.

    High: 85 °F

    Sunny

Detailed Forecast

Today
A chance of showers, mainly after 8am. Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 77. Calm wind becoming southeast around 5 mph in the morning. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.
Tonight
Showers and thunderstorms likely. Patchy fog after 9pm. Otherwise, mostly cloudy, with a low around 67. East wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Sunday
A chance of showers, mainly before 7am. Patchy fog before 10am. Otherwise, mostly sunny, with a high near 82. West wind 5 to 10 mph. Chance of precipitation is 30%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday Night
Mostly clear, with a low around 62. West wind around 5 mph becoming calm in the evening.
Monday
Sunny, with a high near 80. West wind 5 to 10 mph.
Monday Night
Mostly clear, with a low around 60.
Tuesday
Sunny, with a high near 81.
Tuesday Night
Mostly clear, with a low around 62.
Wednesday
Sunny, with a high near 85.
Wednesday Night
Partly cloudy, with a low around 66.
Thursday
Showers likely. Partly sunny, with a high near 85. Chance of precipitation is 60%.
Thursday Night
Showers likely. Mostly cloudy, with a low around 67. Chance of precipitation is 60%.
Friday
A chance of showers. Partly sunny, with a high near 86. Chance of precipitation is 40%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Norristown PA
 40.11°N 75.33°W (Elev. 177 ft)
Last Update:
4:09 am EDT Aug 22, 2026
Forecast Valid:
4am EDT Aug 22, 2026-6pm EDT Aug 28, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation