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

Extreme Heat and Excessive Rainfall This Week

A significant heat wave is underway for the Intermountain West, Northern Plains, and Upper Great Lakes, peaking in intensity through midweek and lingering across parts of the Northern Plains and Midwest until this weekend. In southwest Texas, excessive rainfall may bring a risk for potentially life-threatening flash and arroyo flooding through Thursday. Read More >

Hazardous Weather Conditions

Current conditions at

Philadelphia - Wings Field Airport (KLOM)

Lat: 40.14°NLon: 75.27°WElev: 282ft.

Fair

87°F

31°C

Humidity 55%
Wind Speed SW 7 mph
Barometer 30.09 in
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Heat Index91°F (33°C)
Last update 14 Jul 1:35 pm EDT
Extended Forecast for

Berwyn PA

Heat Advisory July 15, 10:00am until July 15, 08:00pm
Click here for hazard details and duration
Heat Advisory

  • This Afternoon

    This Afternoon: Sunny, with a high near 92. West wind around 10 mph.

    High: 92 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 74. Southwest wind around 10 mph.

    Low: 74 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 97. Heat index values as high as 102. West wind 10 to 15 mph.

    High: 97 °F

    Hot

  • Wednesday Night

    Wednesday Night: Patchy smoke. Partly cloudy, with a low around 74. West wind 5 to 10 mph becoming light north after midnight.

    Low: 74 °F

    Patchy Smoke

  • Thursday

    Thursday: Mostly sunny, with a high near 93. Light northwest wind becoming west 5 to 10 mph in the afternoon.

    High: 93 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 72.

    Low: 72 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 90.

    High: 90 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A chance of showers after 2am. Partly cloudy, with a low around 69. Chance of precipitation is 30%.

    Low: 69 °F

    Partly Cloudy
    then Chance
    Showers

  • Saturday

    Saturday: A chance of showers, with thunderstorms also possible after 2pm. Partly sunny, with a high near 85. Chance of precipitation is 50%.

    High: 85 °F

    Chance
    Showers then
    Chance
    T-storms

Detailed Forecast

This Afternoon
Sunny, with a high near 92. West wind around 10 mph.
Tonight
Mostly clear, with a low around 74. Southwest wind around 10 mph.
Wednesday
Sunny and hot, with a high near 97. Heat index values as high as 102. West wind 10 to 15 mph.
Wednesday Night
Patchy smoke. Partly cloudy, with a low around 74. West wind 5 to 10 mph becoming light north after midnight.
Thursday
Mostly sunny, with a high near 93. Light northwest wind becoming west 5 to 10 mph in the afternoon.
Thursday Night
Partly cloudy, with a low around 72.
Friday
Mostly sunny, with a high near 90.
Friday Night
A chance of showers after 2am. Partly cloudy, with a low around 69. Chance of precipitation is 30%.
Saturday
A chance of showers, with thunderstorms also possible after 2pm. Partly sunny, with a high near 85. Chance of precipitation is 50%.
Saturday Night
Showers likely and possibly a thunderstorm before 2am, then a chance of showers. Mostly cloudy, with a low around 69. Chance of precipitation is 60%.
Sunday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 86. Chance of precipitation is 60%.
Sunday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 68. Chance of precipitation is 60%.
Monday
A chance of showers. Partly sunny, with a high near 85. Chance of precipitation is 40%.
Basemap Options
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Berwyn PA
 40.04°N 75.46°W (Elev. 466 ft)
Last Update:
4:08 am EDT Jul 14, 2026
Forecast Valid:
1pm EDT Jul 14, 2026-6pm EDT Jul 20, 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