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

53°F

12°C

Humidity 89%
Wind Speed Calm
Barometer 30.03 in (1017.0 mb)
Dewpoint 50°F (10°C)
Visibility 10.00 mi
Last update 15 May 10:53 pm EDT
Extended Forecast for

Lewisburg PA

  • Tonight

    Tonight: Mostly clear, with a low around 47. Calm wind.

    Low: 47 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 81. Calm wind becoming south 5 to 9 mph in the afternoon.

    High: 81 °F

    Sunny

  • Saturday Night

    Saturday Night: A chance of showers, mainly after 8pm. Mostly cloudy, with a low around 60. Southwest wind around 6 mph becoming calm in the evening. Chance of precipitation is 40%.

    Low: 60 °F

    Chance
    Showers

  • Sunday

    Sunday: A slight chance of showers. Mostly sunny, with a high near 84. Calm wind. Chance of precipitation is 20%.

    High: 84 °F

    Slight Chance
    Showers

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 59. Calm wind.

    Low: 59 °F

    Partly Cloudy

  • Monday

    Monday: A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 90. Chance of precipitation is 20%.

    High: 90 °F

    Sunny then
    Slight Chance
    T-storms

  • Monday Night

    Monday Night: Partly cloudy, with a low around 65.

    Low: 65 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny and hot, with a high near 93.

    High: 93 °F

    Hot

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 66.

    Low: 66 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 47. Calm wind.
Saturday
Sunny, with a high near 81. Calm wind becoming south 5 to 9 mph in the afternoon.
Saturday Night
A chance of showers, mainly after 8pm. Mostly cloudy, with a low around 60. Southwest wind around 6 mph becoming calm in the evening. Chance of precipitation is 40%.
Sunday
A slight chance of showers. Mostly sunny, with a high near 84. Calm wind. Chance of precipitation is 20%.
Sunday Night
Partly cloudy, with a low around 59. Calm wind.
Monday
A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 90. Chance of precipitation is 20%.
Monday Night
Partly cloudy, with a low around 65.
Tuesday
Mostly sunny and hot, with a high near 93.
Tuesday Night
Partly cloudy, with a low around 66.
Wednesday
Showers likely, mainly after 2pm. Partly sunny, with a high near 86. Chance of precipitation is 70%.
Wednesday Night
Showers likely. Mostly cloudy, with a low around 56. Chance of precipitation is 60%.
Thursday
Partly sunny, with a high near 71.
Thursday Night
Partly cloudy, with a low around 50.
Friday
Mostly sunny, with a high near 72.
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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:
8:06 pm EDT May 15, 2026
Forecast Valid:
11pm EDT May 15, 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