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

Thunderstorms and Heavy Rainfall in the Plains; Hazardous Heat in the South and Southeast

Severe thunderstorms will be possible across the northern/central Plains through Tuesday afternoon and from the central Plains to the Mid-Mississippi Valley Tuesday evening through Wednesday morning. Storms may produce large hail and damaging wind gusts, and heavy rainfall may lead to scattered instances of flash flooding. Meanwhile, hazardous heat persists across the South and Southeast. Read More >

Current conditions at

Philadelphia, Philadelphia International Airport (KPHL)

Lat: 39.87°NLon: 75.23°WElev: 7ft.

Light Rain

76°F

24°C

Humidity 91%
Wind Speed NE 5 mph
Barometer 29.84 in (1010.5 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index76°F (24°C)
Last update 18 Aug 5:54 am EDT
Extended Forecast for

Philadelphia PA

  • Today

    Today: Isolated showers and thunderstorms after 1pm. Patchy fog before 9am. Otherwise, partly sunny, with a high near 89. North wind around 5 mph. Chance of precipitation is 20%.

    High: 89 °F

    Patchy Fog
    then Isolated
    T-storms

  • Tonight

    Tonight: Isolated showers and thunderstorms before 10pm. Mostly clear, with a low around 69. Northwest wind around 5 mph becoming calm. Chance of precipitation is 20%.

    Low: 69 °F

    Isolated
    T-storms then
    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 90. Calm wind becoming west around 5 mph in the afternoon.

    High: 90 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 72. West wind around 5 mph becoming calm.

    Low: 72 °F

    Partly Cloudy

  • Thursday

    Thursday: A chance of showers, then showers and possibly a thunderstorm after 2pm. High near 87. Calm wind becoming west around 5 mph 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.

    High: 87 °F

    Chance
    Showers then
    Showers

  • Thursday Night

    Thursday Night: Showers and thunderstorms before 11pm, then a chance of showers between 11pm and 2am, then a slight chance of showers and thunderstorms after 2am. Low around 69. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 69 °F

    Showers then
    Chance
    Showers

  • Friday

    Friday: A chance of showers after 2pm. Partly sunny, with a high near 85. Chance of precipitation is 30%.

    High: 85 °F

    Partly Sunny
    then Chance
    Showers

  • Friday Night

    Friday Night: A chance of showers. Mostly cloudy, with a low around 69. Chance of precipitation is 40%.

    Low: 69 °F

    Chance
    Showers

  • Saturday

    Saturday: A chance of showers. Partly sunny, with a high near 83. Chance of precipitation is 50%.

    High: 83 °F

    Chance
    Showers

Detailed Forecast

Today
Isolated showers and thunderstorms after 1pm. Patchy fog before 9am. Otherwise, partly sunny, with a high near 89. North wind around 5 mph. Chance of precipitation is 20%.
Tonight
Isolated showers and thunderstorms before 10pm. Mostly clear, with a low around 69. Northwest wind around 5 mph becoming calm. Chance of precipitation is 20%.
Wednesday
Sunny, with a high near 90. Calm wind becoming west around 5 mph in the afternoon.
Wednesday Night
Partly cloudy, with a low around 72. West wind around 5 mph becoming calm.
Thursday
A chance of showers, then showers and possibly a thunderstorm after 2pm. High near 87. Calm wind becoming west around 5 mph 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.
Thursday Night
Showers and thunderstorms before 11pm, then a chance of showers between 11pm and 2am, then a slight chance of showers and thunderstorms after 2am. Low around 69. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday
A chance of showers after 2pm. Partly sunny, with a high near 85. Chance of precipitation is 30%.
Friday Night
A chance of showers. Mostly cloudy, with a low around 69. Chance of precipitation is 40%.
Saturday
A chance of showers. Partly sunny, with a high near 83. Chance of precipitation is 50%.
Saturday Night
Showers likely, mainly before 2am. Mostly cloudy, with a low around 69. Chance of precipitation is 60%.
Sunday
A chance of showers. Partly sunny, with a high near 85. Chance of precipitation is 40%.
Sunday Night
A chance of showers. Partly cloudy, with a low around 67. Chance of precipitation is 30%.
Monday
Sunny, with a high near 84.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Philadelphia PA
 39.96°N 75.16°W (Elev. 26 ft)
Last Update:
2:35 am EDT Aug 18, 2026
Forecast Valid:
6am EDT Aug 18, 2026-6pm EDT Aug 24, 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