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Hazardous Weather Conditions

Current conditions at

Altoona - Blair County Airport (KAOO)

Lat: 40.3°NLon: 78.32°WElev: 1467ft.

Fog/Mist

60°F

16°C

Humidity 96%
Wind Speed Calm
Barometer 30.12 in (1019.3 mb)
Dewpoint 59°F (15°C)
Visibility 4.00 mi
Last update 20 Aug 10:53 pm EDT
Extended Forecast for

4 Miles NNE Williamsburg PA

  • Tonight

    Tonight: Areas of fog. Otherwise, partly cloudy, with a low around 58. Calm wind.

    Low: 58 °F

    Areas Fog

  • Friday

    Friday: Patchy fog before 10am. Otherwise, mostly sunny, with a high near 80. Light and variable wind.

    High: 80 °F

    Patchy Fog
    then Sunny

  • Friday Night

    Friday Night: A slight chance of showers between 2am and 5am, then a slight chance of showers and thunderstorms after 5am. Patchy fog before 11pm, then patchy fog after midnight. Otherwise, increasing clouds, with a low around 62. Calm wind. Chance of precipitation is 20%.

    Low: 62 °F

    Patchy Fog
    then Slight
    Chance
    T-storms and
    Patchy Fog

  • Saturday

    Saturday: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 2pm. Patchy fog before 11am. High near 79. Light southeast wind. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 79 °F

    Chance
    Showers and
    Patchy Fog
    then Showers

  • Saturday Night

    Saturday Night: Showers and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 11pm, then a chance of showers after 11pm. Patchy fog after 11pm. Low around 62. Calm wind. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 62 °F

    Showers and
    Patchy Fog
    then Chance
    Showers and
    Patchy Fog

  • Sunday

    Sunday: A slight chance of showers, with thunderstorms also possible after 2pm. Mostly sunny, with a high near 78. Chance of precipitation is 20%.

    High: 78 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 57.

    Low: 57 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 76.

    High: 76 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 54.

    Low: 54 °F

    Mostly Clear

Detailed Forecast

Tonight
Areas of fog. Otherwise, partly cloudy, with a low around 58. Calm wind.
Friday
Patchy fog before 10am. Otherwise, mostly sunny, with a high near 80. Light and variable wind.
Friday Night
A slight chance of showers between 2am and 5am, then a slight chance of showers and thunderstorms after 5am. Patchy fog before 11pm, then patchy fog after midnight. Otherwise, increasing clouds, with a low around 62. Calm wind. Chance of precipitation is 20%.
Saturday
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 2pm. Patchy fog before 11am. High near 79. Light southeast wind. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday Night
Showers and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 11pm, then a chance of showers after 11pm. Patchy fog after 11pm. Low around 62. Calm wind. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday
A slight chance of showers, with thunderstorms also possible after 2pm. Mostly sunny, with a high near 78. Chance of precipitation is 20%.
Sunday Night
Mostly clear, with a low around 57.
Monday
Mostly sunny, with a high near 76.
Monday Night
Mostly clear, with a low around 54.
Tuesday
Mostly sunny, with a high near 78.
Tuesday Night
Mostly clear, with a low around 57.
Wednesday
Mostly sunny, with a high near 82.
Wednesday Night
Partly cloudy, with a low around 63.
Thursday
A chance of showers. Partly sunny, with a high near 83. Chance of precipitation is 30%.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles NNE Williamsburg PA
 40.51°N 78.17°W (Elev. 804 ft)
Last Update:
8:11 pm EDT Aug 20, 2026
Forecast Valid:
11pm EDT Aug 20, 2026-6pm EDT Aug 27, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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