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.

A Few Clouds

64°F

18°C

Humidity 81%
Wind Speed SW 7 mph
Barometer 30.04 in (1016.5 mb)
Dewpoint 58°F (14°C)
Visibility 10.00 mi
Last update 16 May 11:53 pm EDT
Extended Forecast for

Shirleysburg PA

  • Overnight

    Overnight: Partly cloudy, with a low around 59. Calm wind.

    Low: 59 °F

    Partly Cloudy

  • Sunday

    Sunday: A chance of showers and thunderstorms, mainly before 4pm. Patchy fog before 8am. Otherwise, partly sunny, with a high near 90. Light and variable wind. Chance of precipitation is 30%.

    High: 90 °F

    Patchy Fog
    then Chance
    T-storms

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 62. Calm wind.

    Low: 62 °F

    Mostly Clear

  • Monday

    Monday: A slight chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 97. Calm wind becoming south around 5 mph in the afternoon. Chance of precipitation is 20%.

    High: 97 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Monday Night

    Monday Night: Partly cloudy, with a low around 67. Calm wind.

    Low: 67 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny and hot, with a high near 97.

    High: 97 °F

    Hot

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 70.

    Low: 70 °F

    Mostly Clear

  • Wednesday

    Wednesday: A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 90. Chance of precipitation is 70%.

    High: 90 °F

    Chance
    Showers then
    Showers
    Likely

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm before 8pm. Mostly cloudy, with a low around 52. Chance of precipitation is 60%.

    Low: 52 °F

    Showers
    Likely then
    Mostly Cloudy

Detailed Forecast

Overnight
Partly cloudy, with a low around 59. Calm wind.
Sunday
A chance of showers and thunderstorms, mainly before 4pm. Patchy fog before 8am. Otherwise, partly sunny, with a high near 90. Light and variable wind. Chance of precipitation is 30%.
Sunday Night
Mostly clear, with a low around 62. Calm wind.
Monday
A slight chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 97. Calm wind becoming south around 5 mph in the afternoon. Chance of precipitation is 20%.
Monday Night
Partly cloudy, with a low around 67. Calm wind.
Tuesday
Mostly sunny and hot, with a high near 97.
Tuesday Night
Mostly clear, with a low around 70.
Wednesday
A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 90. Chance of precipitation is 70%.
Wednesday Night
Showers likely and possibly a thunderstorm before 8pm. Mostly cloudy, with a low around 52. Chance of precipitation is 60%.
Thursday
Partly sunny, with a high near 73.
Thursday Night
Mostly cloudy, with a low around 50.
Friday
A chance of showers. Mostly cloudy, with a high near 69. Chance of precipitation is 50%.
Friday Night
A chance of showers. Mostly cloudy, with a low around 51. Chance of precipitation is 40%.
Saturday
A chance of showers. Mostly cloudy, with a high near 72. Chance of precipitation is 50%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Shirleysburg PA
 40.29°N 77.89°W (Elev. 600 ft)
Last Update:
12:15 am EDT May 17, 2026
Forecast Valid:
12am EDT May 17, 2026-6pm EDT May 23, 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