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

Heat Wave and Severe Thunderstorms this Independence Day

A prolonged, dangerous heat wave will persist through the Independence Day weekend across the Ohio Valley, Midwest, and Mid-Atlantic. Numerous temperature records are expected. Clusters of severe thunderstorms will move across parts of the Allegheny Plateau into Mid Atlantic this Independence Day, with potential for widespread damaging winds. Additional severe thunderstorms in the Great Plains. Read More >

Hazardous Weather Conditions

Current conditions at

Altoona - Blair County Airport (KAOO)

Lat: 40.3°NLon: 78.32°WElev: 1467ft.

A Few Clouds

87°F

31°C

Humidity 53%
Wind Speed W 6 mph
Barometer 30.06 in (1016.4 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Heat Index90°F (32°C)
Last update 4 Jul 11:53 am EDT
Extended Forecast for

Hollidaysburg PA

Heat Advisory July 4, 12:46pm until July 4, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory July 4, 12:46pm until July 4, 08:00pm

    NOW until 8:00pm Sat

    Heat Advisory

  • Independence Day

    High: 93 °F

    Severe
    Thunderstorms

  • Tonight

    Tonight: A chance of showers and thunderstorms before 2am, then a slight chance of showers. Some of the storms could be severe. Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 69. Southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 69 °F

    Severe
    Thunderstorms
    and Patchy
    Fog

  • Sunday

    Sunday: Showers and thunderstorms likely, mainly between 4pm and 5pm, then showers likely and possibly a thunderstorm after 5pm. Some of the storms could produce heavy rainfall. Patchy fog between 7am and 8am. Otherwise, mostly cloudy, with a high near 87. Light north wind. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    High: 87 °F

    Chance
    Showers and
    Patchy Fog
    then Heavy
    Rain

  • Sunday Night

    Sunday Night: Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Patchy fog before 1am, then patchy fog after 2am. Low around 66. Calm wind. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 66 °F

    Heavy Rain
    and Patchy
    Fog

  • Monday

    Monday: Showers and possibly a thunderstorm. Patchy fog before 10am. High near 81. Light southeast wind. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 81 °F

    Showers and
    Patchy Fog
    then T-storms

  • Monday Night

    Monday Night: Showers and possibly a thunderstorm before 2am, then a chance of showers. Low around 65. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 65 °F

    T-storms then
    Showers

  • Tuesday

    Tuesday: A chance of showers, with thunderstorms also possible after 2pm. Mostly cloudy, with a high near 81. Chance of precipitation is 50%.

    High: 81 °F

    Chance
    Showers then
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 65. Chance of precipitation is 30%.

    Low: 65 °F

    Chance
    T-storms then
    Chance
    Showers

Detailed Forecast

Independence Day
A slight chance of showers between 3pm and 5pm, then a slight chance of showers and thunderstorms after 5pm. Some of the storms could be severe. Partly sunny and hot, with a high near 93. Heat index values as high as 100. West wind 8 to 10 mph. Chance of precipitation is 20%.
Tonight
A chance of showers and thunderstorms before 2am, then a slight chance of showers. Some of the storms could be severe. Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 69. Southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday
Showers and thunderstorms likely, mainly between 4pm and 5pm, then showers likely and possibly a thunderstorm after 5pm. Some of the storms could produce heavy rainfall. Patchy fog between 7am and 8am. Otherwise, mostly cloudy, with a high near 87. Light north wind. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Sunday Night
Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Patchy fog before 1am, then patchy fog after 2am. Low around 66. Calm wind. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Monday
Showers and possibly a thunderstorm. Patchy fog before 10am. High near 81. Light southeast wind. 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 2am, then a chance of showers. Low around 65. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tuesday
A chance of showers, with thunderstorms also possible after 2pm. Mostly cloudy, with a high near 81. Chance of precipitation is 50%.
Tuesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 65. Chance of precipitation is 30%.
Wednesday
A chance of showers. Partly sunny, with a high near 84. Chance of precipitation is 30%.
Wednesday Night
Mostly cloudy, with a low around 65.
Thursday
A chance of showers and thunderstorms. Partly sunny, with a high near 87. Chance of precipitation is 40%.
Thursday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 67. Chance of precipitation is 30%.
Friday
A chance of showers and thunderstorms. Partly sunny, with a high near 87. Chance of precipitation is 50%.
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ABOUT THIS FORECAST

 
Point Forecast:
Hollidaysburg PA
 40.42°N 78.39°W (Elev. 1053 ft)
Last Update:
8:06 am EDT Jul 4, 2026
Forecast Valid:
12pm EDT Jul 4, 2026-6pm EDT Jul 10, 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