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

Heat Builds in the West; Extremely Critical Fire Weather in the Northwest

A heat wave over the Southwest will intensify this week, peaking and expanding into the Intermountain West and northern High Plains this weekend. Critical to extremely critical fire weather conditions are forecast from the Northwest and the northern Great Basin this weekend. Particularly Dangerous Situation Red Flag Warnings have been issued. Read More >

Current conditions at

Philadelphia, Northeast Philadelphia Airport (KPNE)

Lat: 40.08°NLon: 75.01°WElev: 118ft.

Fair

69°F

21°C

Humidity 96%
Wind Speed Calm
Barometer 29.97 in (1014.7 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Last update 1 Aug 5:54 am EDT
Extended Forecast for

Cornwells PA

  • Today

    Today: Partly sunny, with a high near 88. Calm wind becoming south around 5 mph in the afternoon.

    High: 88 °F

    Partly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 71. South wind around 5 mph.

    Low: 71 °F

    Mostly Cloudy

  • Sunday

    Sunday: A slight chance of showers between 4pm and 5pm, then a chance of showers and thunderstorms after 5pm. Mostly cloudy, with a high near 87. South wind 5 to 10 mph. Chance of precipitation is 30%.

    High: 87 °F

    Mostly Cloudy
    then Chance
    T-storms

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms before 8pm, then showers and possibly a thunderstorm between 8pm and 5am, then showers after 5am. Low around 72. Southeast wind 5 to 10 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 72 °F

    Showers

  • Monday

    Monday: Showers likely, then showers and possibly a thunderstorm after 8am. High near 85. Southwest wind around 5 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 85 °F

    Showers

  • Monday Night

    Monday Night: Showers and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am, then a slight chance of showers after 2am. Low around 70. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 70 °F

    Showers then
    Chance
    Showers

  • Tuesday

    Tuesday: Showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 85. Chance of precipitation is 60%.

    High: 85 °F

    Partly Sunny
    then Showers
    Likely

  • Tuesday Night

    Tuesday Night: Showers likely and possibly a thunderstorm before 8pm, then a chance of showers between 8pm and 2am. Mostly cloudy, with a low around 70. Chance of precipitation is 60%.

    Low: 70 °F

    Showers
    Likely

  • Wednesday

    Wednesday: Showers likely and possibly a thunderstorm, mainly after 2pm. Partly sunny, with a high near 87. Chance of precipitation is 60%.

    High: 87 °F

    Chance
    Showers then
    Showers
    Likely

Detailed Forecast

Today
Partly sunny, with a high near 88. Calm wind becoming south around 5 mph in the afternoon.
Tonight
Mostly cloudy, with a low around 71. South wind around 5 mph.
Sunday
A slight chance of showers between 4pm and 5pm, then a chance of showers and thunderstorms after 5pm. Mostly cloudy, with a high near 87. South wind 5 to 10 mph. Chance of precipitation is 30%.
Sunday Night
A chance of showers and thunderstorms before 8pm, then showers and possibly a thunderstorm between 8pm and 5am, then showers after 5am. Low around 72. Southeast wind 5 to 10 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
Monday
Showers likely, then showers and possibly a thunderstorm after 8am. High near 85. Southwest wind around 5 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Monday Night
Showers and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am, then a slight chance of showers after 2am. Low around 70. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tuesday
Showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 85. Chance of precipitation is 60%.
Tuesday Night
Showers likely and possibly a thunderstorm before 8pm, then a chance of showers between 8pm and 2am. Mostly cloudy, with a low around 70. Chance of precipitation is 60%.
Wednesday
Showers likely and possibly a thunderstorm, mainly after 2pm. Partly sunny, with a high near 87. Chance of precipitation is 60%.
Wednesday Night
Showers likely and possibly a thunderstorm before 8pm, then a chance of showers between 8pm and 2am. Mostly cloudy, with a low around 72. Chance of precipitation is 60%.
Thursday
A chance of showers and thunderstorms. Partly sunny, with a high near 88. Chance of precipitation is 50%.
Thursday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 72. Chance of precipitation is 40%.
Friday
A chance of showers and thunderstorms. Partly sunny, with a high near 89. Chance of precipitation is 40%.
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ABOUT THIS FORECAST

 
Point Forecast:
Cornwells PA
 40.07°N 74.96°W (Elev. 39 ft)
Last Update:
4:08 am EDT Aug 1, 2026
Forecast Valid:
6am EDT Aug 1, 2026-6pm EDT Aug 7, 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