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.

Partly Cloudy

74°F

23°C

Humidity 62%
Wind Speed Calm
Barometer 30.09 in (1017.9 mb)
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Last update 11 Sep 11:53 am EDT
Extended Forecast for

Defiance PA

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 80. Calm wind.

    High: 80 °F

    Mostly Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 63. Calm wind.

    Low: 63 °F

    Increasing
    Clouds

  • Saturday

    Saturday: A chance of showers, with thunderstorms also possible after 2pm. Mostly cloudy, with a high near 78. Calm wind becoming south 5 to 7 mph in the morning. Chance of precipitation is 30%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 78 °F

    Chance
    Showers then
    Chance
    T-storms

  • Saturday Night

    Saturday Night: Showers and possibly a thunderstorm. Low around 65. Light southeast wind. Chance of precipitation is 80%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 65 °F

    Showers

  • Sunday

    Sunday: A chance of showers before 8am. Partly sunny, with a high near 82. Calm wind becoming west around 5 mph in the afternoon. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    High: 82 °F

    Chance
    Showers then
    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 61.

    Low: 61 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 77.

    High: 77 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 56.

    Low: 56 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 79.

    High: 79 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 80. Calm wind.
Tonight
Increasing clouds, with a low around 63. Calm wind.
Saturday
A chance of showers, with thunderstorms also possible after 2pm. Mostly cloudy, with a high near 78. Calm wind becoming south 5 to 7 mph in the morning. Chance of precipitation is 30%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday Night
Showers and possibly a thunderstorm. Low around 65. Light southeast wind. Chance of precipitation is 80%. New precipitation amounts between a half and three quarters of an inch possible.
Sunday
A chance of showers before 8am. Partly sunny, with a high near 82. Calm wind becoming west around 5 mph in the afternoon. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Sunday Night
Partly cloudy, with a low around 61.
Monday
Mostly sunny, with a high near 77.
Monday Night
Partly cloudy, with a low around 56.
Tuesday
Mostly sunny, with a high near 79.
Tuesday Night
Mostly clear, with a low around 62.
Wednesday
A chance of showers. Mostly sunny, with a high near 83. Chance of precipitation is 40%.
Wednesday Night
A chance of showers. Partly cloudy, with a low around 64. Chance of precipitation is 30%.
Thursday
Showers likely. Partly sunny, with a high near 82. Chance of precipitation is 60%.
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ABOUT THIS FORECAST

 
Point Forecast:
Defiance PA
 40.17°N 78.23°W (Elev. 1135 ft)
Last Update:
11:16 am EDT Sep 11, 2026
Forecast Valid:
12pm EDT Sep 11, 2026-6pm EDT Sep 17, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation