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

54°F

12°C

Humidity 83%
Wind Speed E 3 mph
Barometer 30.28 in (1025.7 mb)
Dewpoint 49°F (9°C)
Visibility 10.00 mi
Last update 21 May 10:53 pm EDT
Extended Forecast for

Williamsburg PA

  • Tonight

    Tonight: Mostly cloudy, with a low around 48. Light northeast wind.

    Low: 48 °F

    Mostly Cloudy

  • Friday

    Friday: Showers likely, mainly after 5pm. Cloudy, with a high near 62. East wind 5 to 9 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 62 °F

    Cloudy then
    Showers
    Likely

  • Friday Night

    Friday Night: Showers, mainly before 2am, then rain after 2am. Low around 43. Southeast wind around 8 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 43 °F

    Showers

  • Saturday

    Saturday: Rain. High near 52. East wind 8 to 10 mph, with gusts as high as 22 mph. Chance of precipitation is 100%. New precipitation amounts between three quarters and one inch possible.

    High: 52 °F

    Rain

  • Saturday Night

    Saturday Night: Rain before 2am, then showers likely after 2am. Low around 47. East wind 3 to 8 mph. Winds could gust as high as 20 mph. Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 47 °F

    Rain

  • Sunday

    Sunday: Showers likely, mainly before 8am. Patchy fog between 10am and noon. Otherwise, mostly cloudy, with a high near 69. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 69 °F

    Showers
    Likely and
    Patchy Fog
    then Slight
    Chance
    Showers

  • Sunday Night

    Sunday Night: A chance of showers after 8pm. Patchy fog after 1am. Otherwise, mostly cloudy, with a low around 56. Chance of precipitation is 50%.

    Low: 56 °F

    Chance
    Showers and
    Patchy Fog

  • Memorial Day

    Memorial Day: Showers likely, with thunderstorms also possible after 2pm. Mostly cloudy, with a high near 79. Chance of precipitation is 60%.

    High: 79 °F

    Showers
    Likely

  • Monday Night

    Monday Night: A chance of thunderstorms before 8pm. Mostly cloudy, with a low around 57. Chance of precipitation is 30%.

    Low: 57 °F

    Chance
    T-storms then
    Mostly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 48. Light northeast wind.
Friday
Showers likely, mainly after 5pm. Cloudy, with a high near 62. East wind 5 to 9 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Friday Night
Showers, mainly before 2am, then rain after 2am. Low around 43. Southeast wind around 8 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.
Saturday
Rain. High near 52. East wind 8 to 10 mph, with gusts as high as 22 mph. Chance of precipitation is 100%. New precipitation amounts between three quarters and one inch possible.
Saturday Night
Rain before 2am, then showers likely after 2am. Low around 47. East wind 3 to 8 mph. Winds could gust as high as 20 mph. Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday
Showers likely, mainly before 8am. Patchy fog between 10am and noon. Otherwise, mostly cloudy, with a high near 69. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Sunday Night
A chance of showers after 8pm. Patchy fog after 1am. Otherwise, mostly cloudy, with a low around 56. Chance of precipitation is 50%.
Memorial Day
Showers likely, with thunderstorms also possible after 2pm. Mostly cloudy, with a high near 79. Chance of precipitation is 60%.
Monday Night
A chance of thunderstorms before 8pm. Mostly cloudy, with a low around 57. Chance of precipitation is 30%.
Tuesday
Mostly cloudy, with a high near 81.
Tuesday Night
Mostly cloudy, with a low around 59.
Wednesday
A chance of showers and thunderstorms. Partly sunny, with a high near 83. Chance of precipitation is 30%.
Wednesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 58. Chance of precipitation is 30%.
Thursday
Mostly sunny, with a high near 82.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Williamsburg PA
 40.45°N 78.21°W (Elev. 1086 ft)
Last Update:
11:08 pm EDT May 21, 2026
Forecast Valid:
11pm EDT May 21, 2026-6pm EDT May 28, 2026
 
Forecast Discussion
 
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Additional Resources

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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