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

Altoona - Blair County Airport (KAOO)

Lat: 40.3°NLon: 78.32°WElev: 1467ft.

Fair

67°F

19°C

Humidity 84%
Wind Speed W 3 mph
Barometer 29.99 in (1015.0 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Last update 19 Aug 8:53 am EDT
Extended Forecast for

Shirleysburg PA

  • Today

    Today: Increasing clouds, with a high near 87. Calm wind becoming west around 5 mph in the afternoon.

    High: 87 °F

    Increasing
    Clouds

  • Tonight

    Tonight: A chance of showers, mainly after 5am. Patchy fog after 4am. Otherwise, partly cloudy, with a low around 64. Calm wind. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 64 °F

    Partly Cloudy
    then Chance
    Showers and
    Patchy Fog

  • Thursday

    Thursday: Showers likely before 2pm, then showers likely and possibly a thunderstorm between 2pm and 3pm, then a chance of showers and thunderstorms after 3pm. Areas of fog between 7am and 10am. Otherwise, mostly cloudy, with a high near 80. Calm wind. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 80 °F

    Showers
    Likely and
    Areas Fog

  • Thursday Night

    Thursday Night: A chance of showers before 7pm. Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 59. Calm wind. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 59 °F

    Chance
    Showers and
    Patchy Fog
    then Patchy
    Fog

  • Friday

    Friday: Patchy fog before 9am. Otherwise, mostly sunny, with a high near 82. Calm wind.

    High: 82 °F

    Patchy Fog
    then Mostly
    Sunny

  • Friday Night

    Friday Night: A slight chance of showers. Patchy fog after 4am. Otherwise, partly cloudy, with a low around 61. Chance of precipitation is 20%.

    Low: 61 °F

    Slight Chance
    Showers and
    Patchy Fog

  • Saturday

    Saturday: A chance of showers. Areas of fog before 8am. Otherwise, partly sunny, with a high near 82. Chance of precipitation is 50%.

    High: 82 °F

    Chance
    Showers and
    Areas Fog

  • Saturday Night

    Saturday Night: A chance of showers before 2am. Mostly cloudy, with a low around 62. Chance of precipitation is 50%.

    Low: 62 °F

    Chance
    Showers

  • Sunday

    Sunday: Mostly sunny, with a high near 82.

    High: 82 °F

    Mostly Sunny

Detailed Forecast

Today
Increasing clouds, with a high near 87. Calm wind becoming west around 5 mph in the afternoon.
Tonight
A chance of showers, mainly after 5am. Patchy fog after 4am. Otherwise, partly cloudy, with a low around 64. Calm wind. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Thursday
Showers likely before 2pm, then showers likely and possibly a thunderstorm between 2pm and 3pm, then a chance of showers and thunderstorms after 3pm. Areas of fog between 7am and 10am. Otherwise, mostly cloudy, with a high near 80. Calm wind. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.
Thursday Night
A chance of showers before 7pm. Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 59. Calm wind. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Friday
Patchy fog before 9am. Otherwise, mostly sunny, with a high near 82. Calm wind.
Friday Night
A slight chance of showers. Patchy fog after 4am. Otherwise, partly cloudy, with a low around 61. Chance of precipitation is 20%.
Saturday
A chance of showers. Areas of fog before 8am. Otherwise, partly sunny, with a high near 82. Chance of precipitation is 50%.
Saturday Night
A chance of showers before 2am. Mostly cloudy, with a low around 62. Chance of precipitation is 50%.
Sunday
Mostly sunny, with a high near 82.
Sunday Night
Partly cloudy, with a low around 58.
Monday
Mostly sunny, with a high near 82.
Monday Night
Partly cloudy, with a low around 58.
Tuesday
Mostly sunny, with a high near 83.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Shirleysburg PA
 40.29°N 77.89°W (Elev. 600 ft)
Last Update:
8:06 am EDT Aug 19, 2026
Forecast Valid:
9am EDT Aug 19, 2026-6pm EDT Aug 25, 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