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

Williamsport - Lycoming County Airport (KIPT)

Lat: 41.24°NLon: 76.92°WElev: 522ft.

Overcast

71°F

22°C

Humidity 90%
Wind Speed Calm
Barometer 30.09 in (1018.5 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Last update 18 Sep 4:54 am EDT
Extended Forecast for

South Williamsport PA

  • Today

    Today: Mostly cloudy, then gradually becoming sunny, with a high near 77. North wind 5 to 8 mph.

    High: 77 °F

    Decreasing
    Clouds

  • Tonight

    Tonight: Patchy fog after 2am. Otherwise, partly cloudy, with a low around 50. North wind 5 to 7 mph becoming calm after midnight.

    Low: 50 °F

    Mostly Clear
    then Patchy
    Fog

  • Saturday

    Saturday: Patchy fog between 8am and 9am. Otherwise, mostly sunny, with a high near 71. Light and variable wind.

    High: 71 °F

    Patchy Fog
    then Partly
    Sunny

  • Saturday Night

    Saturday Night: Showers, mainly after 2am. Low around 59. Calm wind becoming southeast 5 to 9 mph after midnight. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 59 °F

    Chance
    Showers then
    Showers

  • Sunday

    Sunday: Showers, with thunderstorms also possible after 2pm. High near 68. Southeast wind 5 to 8 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.

    High: 68 °F

    Showers

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 56. Chance of precipitation is 50%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 56 °F

    Chance
    Showers

  • Monday

    Monday: A chance of showers. Mostly cloudy, with a high near 66. Chance of precipitation is 40%.

    High: 66 °F

    Chance
    Showers

  • Monday Night

    Monday Night: A chance of showers. Mostly cloudy, with a low around 53. Chance of precipitation is 50%.

    Low: 53 °F

    Chance
    Showers

  • Tuesday

    Tuesday: Showers likely. Cloudy, with a high near 61. Chance of precipitation is 70%.

    High: 61 °F

    Showers
    Likely

Detailed Forecast

Today
Mostly cloudy, then gradually becoming sunny, with a high near 77. North wind 5 to 8 mph.
Tonight
Patchy fog after 2am. Otherwise, partly cloudy, with a low around 50. North wind 5 to 7 mph becoming calm after midnight.
Saturday
Patchy fog between 8am and 9am. Otherwise, mostly sunny, with a high near 71. Light and variable wind.
Saturday Night
Showers, mainly after 2am. Low around 59. Calm wind becoming southeast 5 to 9 mph after midnight. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday
Showers, with thunderstorms also possible after 2pm. High near 68. Southeast wind 5 to 8 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.
Sunday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 56. Chance of precipitation is 50%. New precipitation amounts between a quarter and half of an inch possible.
Monday
A chance of showers. Mostly cloudy, with a high near 66. Chance of precipitation is 40%.
Monday Night
A chance of showers. Mostly cloudy, with a low around 53. Chance of precipitation is 50%.
Tuesday
Showers likely. Cloudy, with a high near 61. Chance of precipitation is 70%.
Tuesday Night
Showers likely. Mostly cloudy, with a low around 49. Chance of precipitation is 60%.
Wednesday
A chance of showers. Mostly cloudy, with a high near 61. Chance of precipitation is 50%.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 49. Chance of precipitation is 50%.
Thursday
A chance of showers. Mostly cloudy, with a high near 64. Chance of precipitation is 40%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
South Williamsport PA
 41.24°N 76.99°W (Elev. 492 ft)
Last Update:
4:23 am EDT Sep 18, 2026
Forecast Valid:
5am EDT Sep 18, 2026-6pm EDT Sep 24, 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