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

Selinsgrove Penn Valley Airport (KSEG)

Lat: 40.82°NLon: 76.87°WElev: 443ft.

Fog/Mist

35°F

2°C

Humidity 96%
Wind Speed Calm
Barometer 29.99 in (1016.0 mb)
Dewpoint 34°F (1°C)
Visibility 5.00 mi
Last update 23 Dec 10:53 pm EST
Extended Forecast for

Lewisburg PA

  • Tonight

    Tonight: Cloudy, then gradually becoming partly cloudy, with a low around 33. Light west wind increasing to 5 to 10 mph after midnight. Winds could gust as high as 23 mph.

    Low: 33 °F

    Decreasing
    Clouds

  • Wednesday

    Wednesday: Sunny, with a high near 43. Northwest wind 5 to 10 mph becoming light north in the afternoon. Winds could gust as high as 24 mph.

    High: 43 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Increasing clouds, with a low around 28. Calm wind.

    Low: 28 °F

    Increasing
    Clouds

  • Christmas Day

    Christmas Day: Mostly cloudy, with a high near 43. Calm wind becoming north 5 to 7 mph in the afternoon.

    High: 43 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 23. North wind around 6 mph becoming calm in the evening.

    Low: 23 °F

    Mostly Cloudy

  • Friday

    Friday: A slight chance of snow before 1pm, then snow and freezing rain, possibly mixed with sleet. High near 31. Chance of precipitation is 80%. New snow and sleet accumulation of 1 to 2 inches possible.

    High: 31 °F

    Slight Chance
    Snow then
    Wintry Mix

  • Friday Night

    Friday Night: Freezing rain, mainly before 1am. Low around 26. Chance of precipitation is 90%.

    Low: 26 °F

    Freezing Rain

  • Saturday

    Saturday: Cloudy, with a high near 36.

    High: 36 °F

    Cloudy

  • Saturday Night

    Saturday Night: A chance of showers after 1am. Cloudy, with a low around 32. Chance of precipitation is 40%.

    Low: 32 °F

    Cloudy then
    Chance
    Showers

Detailed Forecast

Tonight
Cloudy, then gradually becoming partly cloudy, with a low around 33. Light west wind increasing to 5 to 10 mph after midnight. Winds could gust as high as 23 mph.
Wednesday
Sunny, with a high near 43. Northwest wind 5 to 10 mph becoming light north in the afternoon. Winds could gust as high as 24 mph.
Wednesday Night
Increasing clouds, with a low around 28. Calm wind.
Christmas Day
Mostly cloudy, with a high near 43. Calm wind becoming north 5 to 7 mph in the afternoon.
Thursday Night
Mostly cloudy, with a low around 23. North wind around 6 mph becoming calm in the evening.
Friday
A slight chance of snow before 1pm, then snow and freezing rain, possibly mixed with sleet. High near 31. Chance of precipitation is 80%. New snow and sleet accumulation of 1 to 2 inches possible.
Friday Night
Freezing rain, mainly before 1am. Low around 26. Chance of precipitation is 90%.
Saturday
Cloudy, with a high near 36.
Saturday Night
A chance of showers after 1am. Cloudy, with a low around 32. Chance of precipitation is 40%.
Sunday
Showers. High near 43. Chance of precipitation is 80%.
Sunday Night
A chance of rain or freezing rain. Mostly cloudy, with a low around 24. Chance of precipitation is 40%.
Monday
Mostly cloudy, with a high near 30.
Monday Night
Mostly cloudy, with a low around 18.
Tuesday
Partly sunny, with a high near 30.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Lewisburg PA
 40.96°N 76.89°W (Elev. 499 ft)
Last Update:
11:36 pm EST Dec 23, 2025
Forecast Valid:
11pm EST Dec 23, 2025-6pm EST Dec 30, 2025
 
Forecast Discussion
 
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Additional Resources

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National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation