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

Heat Builds in the West; Severe Thunderstorms and Heavy Rain in the Upper Midwest and Mid-Mississippi Valley; Extremely Critical Fire Weather in the Northwest on Saturday

A heat wave over the Southwest will intensify this week, peaking and expanding into the Intermountain West and northern High Plains this weekend. Severe thunderstorms and heavy rainfall are expected over parts of the Upper Midwest to mid-Mississippi Valley today. Critical to extremely critical fire weather conditions from the Northwest and the northern Great Basin on Saturday and Sunday. Read More >

Current conditions at

Pennridge Airport (KCKZ)

Lat: 40.39°NLon: 75.29°WElev: 568ft.

Fair

77°F

25°C

Humidity 74%
Wind Speed NW 5 mph
Barometer 30.01 in
Dewpoint 68°F (20°C)
Visibility 9.00 mi
Heat Index79°F (26°C)
Last update 31 Jul 9:55 am EDT
Extended Forecast for

Harleysville PA

  • Today

    Today: Mostly sunny, with a high near 86. Northwest wind around 5 mph.

    High: 86 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 64. Calm wind.

    Low: 64 °F

    Mostly Clear

  • Saturday

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

    High: 88 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 68. South wind around 5 mph.

    Low: 68 °F

    Mostly Cloudy

  • Sunday

    Sunday: A slight chance of showers after 2pm. Mostly cloudy, with a high near 86. South wind 5 to 10 mph. Chance of precipitation is 20%.

    High: 86 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2am. Mostly cloudy, with a low around 67. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 67 °F

    Chance
    T-storms then
    Showers
    Likely

  • Monday

    Monday: Showers likely, with thunderstorms also possible after 2pm. Mostly cloudy, with a high near 83. Chance of precipitation is 70%.

    High: 83 °F

    Showers
    Likely

  • Monday Night

    Monday Night: A chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 64. Chance of precipitation is 30%.

    Low: 64 °F

    Chance
    T-storms

  • Tuesday

    Tuesday: A chance of showers after 2pm. Partly sunny, with a high near 85. Chance of precipitation is 40%.

    High: 85 °F

    Mostly Sunny
    then Chance
    Showers

Detailed Forecast

Today
Mostly sunny, with a high near 86. Northwest wind around 5 mph.
Tonight
Mostly clear, with a low around 64. Calm wind.
Saturday
Partly sunny, with a high near 88. Calm wind becoming south around 5 mph in the afternoon.
Saturday Night
Mostly cloudy, with a low around 68. South wind around 5 mph.
Sunday
A slight chance of showers after 2pm. Mostly cloudy, with a high near 86. South wind 5 to 10 mph. Chance of precipitation is 20%.
Sunday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2am. Mostly cloudy, with a low around 67. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Monday
Showers likely, with thunderstorms also possible after 2pm. Mostly cloudy, with a high near 83. Chance of precipitation is 70%.
Monday Night
A chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 64. Chance of precipitation is 30%.
Tuesday
A chance of showers after 2pm. Partly sunny, with a high near 85. Chance of precipitation is 40%.
Tuesday Night
A chance of showers before 8pm. Partly cloudy, with a low around 64. Chance of precipitation is 30%.
Wednesday
A chance of showers. Mostly sunny, with a high near 87. Chance of precipitation is 40%.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 67. Chance of precipitation is 40%.
Thursday
A chance of showers. Partly sunny, with a high near 87. Chance of precipitation is 50%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Harleysville PA
 40.27°N 75.39°W (Elev. 299 ft)
Last Update:
8:59 am EDT Jul 31, 2026
Forecast Valid:
10am EDT Jul 31, 2026-6pm EDT Aug 6, 2026
 
Forecast Discussion
 
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Additional Resources

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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