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.

Fog/Mist

66°F

19°C

Humidity 100%
Wind Speed SW 3 mph
Barometer 29.78 in (1007.2 mb)
Dewpoint 66°F (19°C)
Visibility 6.00 mi
Last update 3 Aug 4:53 am EDT
Extended Forecast for

Williamsburg PA

  • Today

    Today: Mostly sunny, with a high near 80. Light and variable wind becoming northwest 5 to 9 mph in the morning.

    High: 80 °F

    Mostly Sunny

  • Tonight

    Tonight: Patchy fog after 2am. Otherwise, mostly clear, with a low around 57. Light north wind.

    Low: 57 °F

    Mostly Clear
    then Patchy
    Fog

  • Tuesday

    Tuesday: Areas of fog before 10am. Otherwise, sunny, with a high near 82. Calm wind.

    High: 82 °F

    Areas Fog
    then Sunny

  • Tuesday Night

    Tuesday Night: Patchy fog after 5am. Otherwise, partly cloudy, with a low around 62. Calm wind.

    Low: 62 °F

    Partly Cloudy
    then Patchy
    Fog

  • Wednesday

    Wednesday: A chance of showers and thunderstorms after 2pm. Patchy fog before 9am. Otherwise, partly sunny, with a high near 84. Calm wind becoming south around 5 mph in the afternoon. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 84 °F

    Patchy Fog
    then Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and 2am. Patchy fog before 4am, then patchy fog after 5am. Otherwise, mostly cloudy, with a low around 68. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 68 °F

    Chance
    T-storms then
    Slight Chance
    Showers and
    Patchy Fog

  • Thursday

    Thursday: Showers and possibly a thunderstorm, mainly after 2pm. Patchy fog before 8am. High near 85. Chance of precipitation is 80%.

    High: 85 °F

    Chance
    Showers and
    Patchy Fog
    then Showers

  • Thursday Night

    Thursday Night: Showers and possibly a thunderstorm before 8pm. Low around 68. Chance of precipitation is 80%.

    Low: 68 °F

    Showers then
    Partly Cloudy

  • Friday

    Friday: Showers likely and possibly a thunderstorm after 2pm. Mostly sunny, with a high near 85. Chance of precipitation is 60%.

    High: 85 °F

    Mostly Sunny
    then Showers
    Likely

Detailed Forecast

Today
Mostly sunny, with a high near 80. Light and variable wind becoming northwest 5 to 9 mph in the morning.
Tonight
Patchy fog after 2am. Otherwise, mostly clear, with a low around 57. Light north wind.
Tuesday
Areas of fog before 10am. Otherwise, sunny, with a high near 82. Calm wind.
Tuesday Night
Patchy fog after 5am. Otherwise, partly cloudy, with a low around 62. Calm wind.
Wednesday
A chance of showers and thunderstorms after 2pm. Patchy fog before 9am. Otherwise, partly sunny, with a high near 84. Calm wind becoming south around 5 mph in the afternoon. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
A chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and 2am. Patchy fog before 4am, then patchy fog after 5am. Otherwise, mostly cloudy, with a low around 68. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday
Showers and possibly a thunderstorm, mainly after 2pm. Patchy fog before 8am. High near 85. Chance of precipitation is 80%.
Thursday Night
Showers and possibly a thunderstorm before 8pm. Low around 68. Chance of precipitation is 80%.
Friday
Showers likely and possibly a thunderstorm after 2pm. Mostly sunny, with a high near 85. Chance of precipitation is 60%.
Friday Night
Showers likely and possibly a thunderstorm before 8pm. Mostly cloudy, with a low around 67. Chance of precipitation is 60%.
Saturday
A chance of showers and thunderstorms. Partly sunny, with a high near 84. Chance of precipitation is 50%.
Saturday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 67. Chance of precipitation is 30%.
Sunday
A chance of showers and thunderstorms. Partly sunny, with a high near 85. Chance of precipitation is 30%.
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ABOUT THIS FORECAST

 
Point Forecast:
Williamsburg PA
 40.45°N 78.21°W (Elev. 1086 ft)
Last Update:
2:21 am EDT Aug 3, 2026
Forecast Valid:
4am EDT Aug 3, 2026-6pm EDT Aug 9, 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