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

Hazardous Weather Conditions

Current conditions at

Philadelphia - Wings Field Airport (KLOM)

Lat: 40.14°NLon: 75.27°WElev: 282ft.

Fair

90°F

32°C

Humidity 40%
Wind Speed S 7 mph
Barometer 30.15 in
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Heat Index91°F (33°C)
Last update 18 May 12:30 pm EDT
Extended Forecast for

Norristown PA

Heat Advisory until May 19, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory until May 19, 08:00pm

    NOW until 8:00pm Tue

    Heat Advisory

  • This Afternoon

    High: 94 °F

    Sunny

  • Tonight

    Tonight: A slight chance of showers between 1am and 2am. Mostly clear, with a low around 70. South wind around 5 mph. Chance of precipitation is 20%.

    Low: 70 °F

    Mostly Clear
    then Slight
    Chance
    Showers

  • Tuesday

    Tuesday: Mostly sunny, with a high near 96. Southwest wind 5 to 10 mph.

    High: 96 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 73. Southwest wind 5 to 10 mph.

    Low: 73 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm after 2pm. High near 93. West wind 5 to 15 mph. Chance of precipitation is 90%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 93 °F

    Sunny then
    Showers

  • Wednesday Night

    Wednesday Night: Showers, mainly before 8pm. Low around 56. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 56 °F

    Showers then
    Chance
    Showers

  • Thursday

    Thursday: Partly sunny, with a high near 70.

    High: 70 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 51.

    Low: 51 °F

    Mostly Cloudy

Detailed Forecast

This Afternoon
Sunny, with a high near 94. Southwest wind 5 to 10 mph.
Tonight
A slight chance of showers between 1am and 2am. Mostly clear, with a low around 70. South wind around 5 mph. Chance of precipitation is 20%.
Tuesday
Mostly sunny, with a high near 96. Southwest wind 5 to 10 mph.
Tuesday Night
Partly cloudy, with a low around 73. Southwest wind 5 to 10 mph.
Wednesday
Showers and possibly a thunderstorm after 2pm. High near 93. West wind 5 to 15 mph. Chance of precipitation is 90%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
Showers, mainly before 8pm. Low around 56. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Thursday
Partly sunny, with a high near 70.
Thursday Night
Mostly cloudy, with a low around 51.
Friday
A chance of showers. Mostly cloudy, with a high near 67. Chance of precipitation is 40%.
Friday Night
Showers likely. Mostly cloudy, with a low around 52. Chance of precipitation is 70%.
Saturday
Showers likely. Mostly cloudy, with a high near 69. Chance of precipitation is 70%.
Saturday Night
Showers likely. Cloudy, with a low around 56. Chance of precipitation is 60%.
Sunday
A chance of showers. Mostly cloudy, with a high near 73. Chance of precipitation is 50%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Norristown PA
 40.13°N 75.33°W (Elev. 200 ft)
Last Update:
4:09 am EDT May 18, 2026
Forecast Valid:
1pm EDT May 18, 2026-6pm EDT May 24, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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