National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Heat the Southwest; Fire Weather in the Central U.S.; Kona Low Impacting Hawaii

A rare March heat wave is ongoing with much above-normal temperatures over the Southwest U.S. through this weekend. Periods of critical fire weather will persist from the central Rockies to the central and southern Plains through the weekend as gusty winds and low relative humidity continue. A Kona low will continue to bring several rounds of moderate to heavy rainfall to Hawaii through Sunday. Read More >

Current conditions at

Altoona - Blair County Airport (KAOO)

Lat: 40.3°NLon: 78.32°WElev: 1467ft.

Fair

58°F

14°C

Humidity 46%
Wind Speed Vrbl 3 mph
Barometer 29.92 in (1013.3 mb)
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Last update 21 Mar 2:53 pm EDT
Extended Forecast for

Williamsburg PA

  • Tonight

    Tonight: Partly cloudy, with a low around 45. Light southeast wind.

    Low: 45 °F

    Partly Cloudy

  • Sunday

    Sunday: Showers and thunderstorms likely, mainly after 5pm. Some of the storms could be severe. Increasing clouds, with a high near 78. Light and variable wind becoming west 6 to 11 mph in the morning. Winds could gust as high as 25 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 78 °F

    Sunny then
    Severe
    Thunderstorms

  • Sunday Night

    Sunday Night: Showers and thunderstorms likely before 8pm, then showers and possibly a thunderstorm between 8pm and 11pm, then showers after 11pm. Some of the storms could be severe. Low around 40. Northwest wind around 6 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 40 °F

    Severe
    Thunderstorms
    then Showers

  • Monday

    Monday: Partly sunny, with a high near 50. Northwest wind around 11 mph, with gusts as high as 23 mph.

    High: 50 °F

    Partly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 28. Northwest wind 3 to 8 mph. Winds could gust as high as 20 mph.

    Low: 28 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 51.

    High: 51 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 34.

    Low: 34 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 58.

    High: 58 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: A chance of showers after 2am. Mostly cloudy, with a low around 37. Chance of precipitation is 30%.

    Low: 37 °F

    Mostly Cloudy
    then Chance
    Showers

Detailed Forecast

Tonight
Partly cloudy, with a low around 45. Light southeast wind.
Sunday
Showers and thunderstorms likely, mainly after 5pm. Some of the storms could be severe. Increasing clouds, with a high near 78. Light and variable wind becoming west 6 to 11 mph in the morning. Winds could gust as high as 25 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday Night
Showers and thunderstorms likely before 8pm, then showers and possibly a thunderstorm between 8pm and 11pm, then showers after 11pm. Some of the storms could be severe. Low around 40. Northwest wind around 6 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Monday
Partly sunny, with a high near 50. Northwest wind around 11 mph, with gusts as high as 23 mph.
Monday Night
Partly cloudy, with a low around 28. Northwest wind 3 to 8 mph. Winds could gust as high as 20 mph.
Tuesday
Sunny, with a high near 51.
Tuesday Night
Mostly cloudy, with a low around 34.
Wednesday
Partly sunny, with a high near 58.
Wednesday Night
A chance of showers after 2am. Mostly cloudy, with a low around 37. Chance of precipitation is 30%.
Thursday
A chance of showers before 8am, then a chance of showers after 2pm. Partly sunny, with a high near 63. Chance of precipitation is 40%.
Thursday Night
Showers likely. Mostly cloudy, with a low around 39. Chance of precipitation is 70%.
Friday
A chance of showers. Mostly sunny, with a high near 51. Chance of precipitation is 30%.
Friday Night
Partly cloudy, with a low around 27.
Saturday
Mostly sunny, with a high near 49.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Williamsburg PA
 40.48°N 78.23°W (Elev. 942 ft)
Last Update:
2:21 pm EDT Mar 21, 2026
Forecast Valid:
3pm EDT Mar 21, 2026-6pm EDT Mar 28, 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