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

Muir Army Air Field / Indiantown (KMUI)

Lat: 40.44°NLon: 76.56°WElev: 476ft.

Fair

70°F

21°C

Humidity 42%
Wind Speed W 7 mph
Barometer 29.82 in (1009.8 mb)
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Last update 20 Jun 12:55 am EDT
Extended Forecast for

Williamstown PA

  • Overnight

    Overnight: Mostly clear, with a low around 59. West wind around 7 mph.

    Low: 59 °F

    Mostly Clear

  • Saturday

    Saturday: A slight chance of showers after 3pm. Sunny, with a high near 77. West wind around 10 mph, with gusts as high as 24 mph. Chance of precipitation is 20%.

    High: 77 °F

    Sunny then
    Slight Chance
    Showers

  • Saturday Night

    Saturday Night: Patchy fog between 4am and 5am. Otherwise, mostly clear, with a low around 56. West wind around 6 mph becoming calm in the evening.

    Low: 56 °F

    Mostly Clear
    then Patchy
    Fog

  • Sunday

    Sunday: Mostly sunny, with a high near 80. West wind 3 to 7 mph.

    High: 80 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A chance of showers after 2am. Mostly cloudy, with a low around 59. Light and variable wind. Chance of precipitation is 50%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 59 °F

    Mostly Cloudy
    then Chance
    Showers

  • Monday

    Monday: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 8am. High near 77. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.

    High: 77 °F

    Showers

  • Monday Night

    Monday Night: Showers likely and possibly a thunderstorm before 8pm, then showers likely between 8pm and 2am. Mostly cloudy, with a low around 58. Chance of precipitation is 60%.

    Low: 58 °F

    Showers
    Likely

  • Tuesday

    Tuesday: Mostly sunny, with a high near 78.

    High: 78 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 56.

    Low: 56 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly clear, with a low around 59. West wind around 7 mph.
Saturday
A slight chance of showers after 3pm. Sunny, with a high near 77. West wind around 10 mph, with gusts as high as 24 mph. Chance of precipitation is 20%.
Saturday Night
Patchy fog between 4am and 5am. Otherwise, mostly clear, with a low around 56. West wind around 6 mph becoming calm in the evening.
Sunday
Mostly sunny, with a high near 80. West wind 3 to 7 mph.
Sunday Night
A chance of showers after 2am. Mostly cloudy, with a low around 59. Light and variable wind. Chance of precipitation is 50%. New precipitation amounts between a tenth and quarter of an inch possible.
Monday
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 8am. High near 77. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.
Monday Night
Showers likely and possibly a thunderstorm before 8pm, then showers likely between 8pm and 2am. Mostly cloudy, with a low around 58. Chance of precipitation is 60%.
Tuesday
Mostly sunny, with a high near 78.
Tuesday Night
Mostly clear, with a low around 56.
Wednesday
Sunny, with a high near 79.
Wednesday Night
A chance of showers. Partly cloudy, with a low around 58. Chance of precipitation is 30%.
Thursday
A chance of showers. Partly sunny, with a high near 78. Chance of precipitation is 50%.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 58. Chance of precipitation is 40%.
Friday
A chance of showers and thunderstorms. Partly sunny, with a high near 79. Chance of precipitation is 50%.
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ABOUT THIS FORECAST

 
Point Forecast:
Williamstown PA
 40.58°N 76.64°W (Elev. 1220 ft)
Last Update:
12:41 am EDT Jun 20, 2026
Forecast Valid:
1am EDT Jun 20, 2026-6pm EDT Jun 26, 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