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.

Overcast

65°F

18°C

Humidity 90%
Wind Speed SW 3 mph
Barometer 30.18 in (1021.4 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Last update 19 Aug 2:53 am EDT
Extended Forecast for

Defiance PA

  • Overnight

    Overnight: Cloudy, with a low around 60. Calm wind.

    Low: 60 °F

    Cloudy

  • Tuesday

    Tuesday: Cloudy, with a high near 72. Southeast wind 3 to 6 mph.

    High: 72 °F

    Cloudy

  • Tuesday Night

    Tuesday Night: A slight chance of showers and thunderstorms before 3am, then a slight chance of showers after 4am. Mostly cloudy, with a low around 63. South wind around 6 mph. Chance of precipitation is 20%.

    Low: 63 °F

    Mostly Cloudy
    then Slight
    Chance
    T-storms

  • Wednesday

    Wednesday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 8am. Mostly cloudy, with a high near 77. South wind 3 to 5 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 77 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 63. Calm wind. Chance of precipitation is 50%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 63 °F

    Chance
    Showers

  • Thursday

    Thursday: A chance of showers. Mostly cloudy, with a high near 73. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    High: 73 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 58.

    Low: 58 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 80.

    High: 80 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 58.

    Low: 58 °F

    Mostly Clear

Detailed Forecast

Overnight
Cloudy, with a low around 60. Calm wind.
Tuesday
Cloudy, with a high near 72. Southeast wind 3 to 6 mph.
Tuesday Night
A slight chance of showers and thunderstorms before 3am, then a slight chance of showers after 4am. Mostly cloudy, with a low around 63. South wind around 6 mph. Chance of precipitation is 20%.
Wednesday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 8am. Mostly cloudy, with a high near 77. South wind 3 to 5 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 63. Calm wind. Chance of precipitation is 50%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday
A chance of showers. Mostly cloudy, with a high near 73. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Thursday Night
Partly cloudy, with a low around 58.
Friday
Sunny, with a high near 80.
Friday Night
Mostly clear, with a low around 58.
Saturday
A chance of showers after 2pm. Mostly sunny, with a high near 82. Chance of precipitation is 30%.
Saturday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 63. Chance of precipitation is 30%.
Sunday
A chance of showers. Partly sunny, with a high near 80. Chance of precipitation is 50%.
Sunday Night
Partly cloudy, with a low around 57.
Monday
Sunny, with a high near 75.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Defiance PA
 40.14°N 78.23°W (Elev. 1401 ft)
Last Update:
3:35 am EDT Aug 19, 2025
Forecast Valid:
3am EDT Aug 19, 2025-6pm EDT Aug 25, 2025
 
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