Dangerous Heat Builds and Expands; Critical Fire Weather for the Southwest; Severe Thunderstorms for Plains and Midwest

Dangerous to record breaking heat will build across the center of the nation and slowly build eastward this week. Wildfire conditions remain critical for the Southwest and portions of the Great Basin through Monday. For the northern Plains and upper Midwest, severe thunderstorms with the potential for large to very large hail and severe winds are the primary hazards. Read More >

Current conditions at

Philadelphia, Philadelphia International Airport (KPHL)

Lat: 39.87°NLon: 75.23°WElev: 7ft.

Mostly Cloudy

72°F

22°C

Humidity 87%
Wind Speed SE 5 mph
Barometer 30.02 in (1016.6 mb)
Dewpoint 68°F (20°C)
Visibility 8.00 mi
Last update 29 Jun 12:54 am EDT
Extended Forecast for

Wallingford PA

Extreme Heat Watch July 1, 12:00pm until July 4, 08:00pm
Click here for hazard details and duration
Extreme Heat Watch
  • Overnight

    Overnight: Patchy fog.  Otherwise, partly cloudy, with a low around 66. Calm wind.

    Low: 66 °F

    Patchy Fog

  • Monday

    Monday: Patchy fog before 9am.  Otherwise, mostly sunny, with a high near 88. Calm wind becoming east around 5 mph.

    High: 88 °F

    Patchy Fog
    then Mostly
    Sunny

  • Monday Night

    Monday Night: Patchy fog after 4am.  Otherwise, partly cloudy, with a low around 66. South wind around 5 mph becoming calm  after midnight.

    Low: 66 °F

    Partly Cloudy
    then Patchy
    Fog

  • Tuesday

    Tuesday: Patchy fog before 8am.  Otherwise, mostly sunny, with a high near 90. South wind 5 to 10 mph.

    High: 90 °F

    Patchy Fog
    then Mostly
    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 71. South wind 5 to 10 mph.

    Low: 71 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny and hot, with a high near 98.

    High: 98 °F

    Hot

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 77.

    Low: 77 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 101.

    High: 101 °F

    Hot

  • Thursday Night

    Thursday Night: Clear, with a low around 80.

    Low: 80 °F

    Clear

Detailed Forecast

Overnight
Patchy fog. Otherwise, partly cloudy, with a low around 66. Calm wind.
Monday
Patchy fog before 9am. Otherwise, mostly sunny, with a high near 88. Calm wind becoming east around 5 mph.
Monday Night
Patchy fog after 4am. Otherwise, partly cloudy, with a low around 66. South wind around 5 mph becoming calm after midnight.
Tuesday
Patchy fog before 8am. Otherwise, mostly sunny, with a high near 90. South wind 5 to 10 mph.
Tuesday Night
Partly cloudy, with a low around 71. South wind 5 to 10 mph.
Wednesday
Sunny and hot, with a high near 98.
Wednesday Night
Mostly clear, with a low around 77.
Thursday
Sunny and hot, with a high near 101.
Thursday Night
Clear, with a low around 80.
Friday
Sunny and hot, with a high near 101.
Friday Night
Partly cloudy, with a low around 77.
Independence Day
A chance of showers and thunderstorms. Mostly sunny and hot, with a high near 98. Chance of precipitation is 40%.
Saturday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 75. Chance of precipitation is 40%.
Sunday
A chance of showers and thunderstorms. Mostly sunny, with a high near 94. Chance of precipitation is 40%.
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ABOUT THIS FORECAST

 
Point Forecast:
Wallingford PA
 39.89°N 75.37°W (Elev. 197 ft)
9:43 pm EDT Jun 28, 2026
1am EDT Jun 29, 2026-6pm EDT Jul 5, 2026
 
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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