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.

Partly Cloudy

68°F

20°C

Humidity 90%
Wind Speed Calm
Barometer 30.00 in (1015.5 mb)
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Last update 28 Aug 12:53 am EDT
Extended Forecast for

Lewisburg PA

  • Overnight

    Overnight: A chance of showers before 2am. Patchy fog. Otherwise, mostly cloudy, with a low around 64. Calm wind. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 64 °F

    Chance
    Showers and
    Patchy Fog

  • Friday

    Friday: Patchy fog before 10am. Otherwise, mostly sunny, with a high near 82. Light north wind.

    High: 82 °F

    Patchy Fog
    then Mostly
    Sunny

  • Friday Night

    Friday Night: Areas of fog after 1am. Otherwise, mostly clear, with a low around 58. Calm wind.

    Low: 58 °F

    Mostly Clear
    then Areas
    Fog

  • Saturday

    Saturday: Patchy fog before 9am. Otherwise, sunny, with a high near 81. Calm wind.

    High: 81 °F

    Patchy Fog
    then Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 62. Calm wind.

    Low: 62 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 86.

    High: 86 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 67.

    Low: 67 °F

    Partly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 86.

    High: 86 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 69.

    Low: 69 °F

    Mostly Cloudy

Detailed Forecast

Overnight
A chance of showers before 2am. Patchy fog. Otherwise, mostly cloudy, with a low around 64. Calm wind. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Friday
Patchy fog before 10am. Otherwise, mostly sunny, with a high near 82. Light north wind.
Friday Night
Areas of fog after 1am. Otherwise, mostly clear, with a low around 58. Calm wind.
Saturday
Patchy fog before 9am. Otherwise, sunny, with a high near 81. Calm wind.
Saturday Night
Mostly clear, with a low around 62. Calm wind.
Sunday
Mostly sunny, with a high near 86.
Sunday Night
Partly cloudy, with a low around 67.
Monday
Partly sunny, with a high near 86.
Monday Night
Mostly cloudy, with a low around 69.
Tuesday
Mostly cloudy, with a high near 88.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 70. Chance of precipitation is 40%.
Wednesday
A chance of showers and thunderstorms. Partly sunny, with a high near 87. Chance of precipitation is 40%.
Wednesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 68. Chance of precipitation is 40%.
Thursday
A chance of showers. Partly sunny, with a high near 83. Chance of precipitation is 40%.
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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:
12:53 am EDT Aug 28, 2026
Forecast Valid:
1am EDT Aug 28, 2026-6pm EDT Sep 3, 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