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

79°F

26°C

Humidity 72%
Wind Speed S 3 mph
Barometer 29.87 in (1011.0 mb)
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Heat Index82°F (28°C)
Last update 4 Sep 5:54 pm EDT
Extended Forecast for

South Branch PA

  • Tonight

    Tonight: Patchy fog after 3am. Otherwise, partly cloudy, with a low around 58. Light northwest wind.

    Low: 58 °F

    Mostly Cloudy
    then Patchy
    Fog

  • Saturday

    Saturday: Mostly sunny, with a high near 75. North wind 3 to 6 mph.

    High: 75 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 53. North wind around 5 mph becoming calm in the evening.

    Low: 53 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 73. North wind 3 to 5 mph.

    High: 73 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Patchy fog after 1am. Otherwise, mostly clear, with a low around 50. Light north wind.

    Low: 50 °F

    Mostly Clear
    then Patchy
    Fog

  • Labor Day

    Labor Day: Patchy fog before 10am. Otherwise, sunny, with a high near 75.

    High: 75 °F

    Patchy Fog
    then Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 53.

    Low: 53 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 77.

    High: 77 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 58.

    Low: 58 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Patchy fog after 3am. Otherwise, partly cloudy, with a low around 58. Light northwest wind.
Saturday
Mostly sunny, with a high near 75. North wind 3 to 6 mph.
Saturday Night
Partly cloudy, with a low around 53. North wind around 5 mph becoming calm in the evening.
Sunday
Mostly sunny, with a high near 73. North wind 3 to 5 mph.
Sunday Night
Patchy fog after 1am. Otherwise, mostly clear, with a low around 50. Light north wind.
Labor Day
Patchy fog before 10am. Otherwise, sunny, with a high near 75.
Monday Night
Mostly clear, with a low around 53.
Tuesday
Mostly sunny, with a high near 77.
Tuesday Night
Mostly cloudy, with a low around 58.
Wednesday
Partly sunny, with a high near 80.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 65. Chance of precipitation is 40%.
Thursday
A chance of showers. Mostly sunny, with a high near 78. Chance of precipitation is 30%.
Thursday Night
A chance of showers. Partly cloudy, with a low around 54. Chance of precipitation is 30%.
Friday
Mostly sunny, with a high near 70.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
South Branch PA
 41.65°N 76.45°W (Elev. 1099 ft)
Last Update:
2:30 pm EDT Sep 4, 2026
Forecast Valid:
7pm EDT Sep 4, 2026-6pm EDT Sep 11, 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