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.

Fair

44°F

7°C

Humidity 100%
Wind Speed Calm
Barometer 30.07 in (1018.1 mb)
Dewpoint 44°F (7°C)
Visibility 9.00 mi
Last update 16 May 3:53 am EDT
Extended Forecast for

Lewisburg PA

  • Today

    Today: Sunny, with a high near 82. Calm wind becoming south 5 to 9 mph in the afternoon.

    High: 82 °F

    Sunny

  • Tonight

    Tonight: A chance of showers and thunderstorms. Mostly cloudy, then gradually becoming mostly clear, with a low around 60. Southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 60 °F

    Chance
    Showers

  • Sunday

    Sunday: A slight chance of showers after 2pm. Mostly sunny, with a high near 85. Calm wind. Chance of precipitation is 20%.

    High: 85 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 60. Calm wind.

    Low: 60 °F

    Partly Cloudy

  • Monday

    Monday: A slight chance of showers between 2pm and 5pm, then a slight chance of showers and thunderstorms after 5pm. Sunny, with a high near 91. Calm wind becoming south 5 to 7 mph in the afternoon. Chance of precipitation is 20%.

    High: 91 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Monday Night

    Monday Night: Mostly clear, with a low around 66.

    Low: 66 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny and hot, with a high near 94.

    High: 94 °F

    Hot

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 68.

    Low: 68 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 89. Chance of precipitation is 70%.

    High: 89 °F

    Chance
    Showers then
    Showers
    Likely

Detailed Forecast

Today
Sunny, with a high near 82. Calm wind becoming south 5 to 9 mph in the afternoon.
Tonight
A chance of showers and thunderstorms. Mostly cloudy, then gradually becoming mostly clear, with a low around 60. Southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday
A slight chance of showers after 2pm. Mostly sunny, with a high near 85. Calm wind. Chance of precipitation is 20%.
Sunday Night
Partly cloudy, with a low around 60. Calm wind.
Monday
A slight chance of showers between 2pm and 5pm, then a slight chance of showers and thunderstorms after 5pm. Sunny, with a high near 91. Calm wind becoming south 5 to 7 mph in the afternoon. Chance of precipitation is 20%.
Monday Night
Mostly clear, with a low around 66.
Tuesday
Mostly sunny and hot, with a high near 94.
Tuesday Night
Partly cloudy, with a low around 68.
Wednesday
A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 89. Chance of precipitation is 70%.
Wednesday Night
Showers likely and possibly a thunderstorm before 8pm, then a chance of showers between 8pm and 2am. Mostly cloudy, with a low around 55. Chance of precipitation is 60%.
Thursday
Partly sunny, with a high near 71.
Thursday Night
Partly cloudy, with a low around 49.
Friday
Partly sunny, with a high near 70.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Lewisburg PA
 40.96°N 76.89°W (Elev. 499 ft)
Last Update:
2:56 am EDT May 16, 2026
Forecast Valid:
4am EDT May 16, 2026-6pm EDT May 22, 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