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.

A Few Clouds

77°F

25°C

Humidity 52%
Wind Speed N 7 mph
Barometer 30.01 in (1015.8 mb)
Dewpoint 58°F (14°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 6 Sep 4:53 pm EDT
Extended Forecast for

Lewisburg PA

  • Tonight

    Tonight: Patchy fog after 4am. Otherwise, mostly clear, with a low around 53. North wind around 5 mph becoming calm in the evening.

    Low: 53 °F

    Mostly Clear
    then Patchy
    Fog

  • Labor Day

    Labor Day: Patchy fog before 9am. Otherwise, sunny, with a high near 77. Calm wind.

    High: 77 °F

    Patchy Fog
    then Sunny

  • Monday Night

    Monday Night: Patchy fog after 4am. Otherwise, increasing clouds, with a low around 52. Calm wind.

    Low: 52 °F

    Mostly Clear
    then Patchy
    Fog

  • Tuesday

    Tuesday: Patchy fog before 8am. Otherwise, mostly sunny, with a high near 80. Calm wind.

    High: 80 °F

    Patchy Fog
    then Sunny

  • Tuesday Night

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

    Low: 59 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 85.

    High: 85 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: A chance of showers. Mostly cloudy, with a low around 68. Chance of precipitation is 50%.

    Low: 68 °F

    Chance
    Showers

  • Thursday

    Thursday: Showers likely, mainly after 2pm. Mostly cloudy, with a high near 81. Chance of precipitation is 60%.

    High: 81 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: Showers likely before 8pm. Mostly cloudy, with a low around 57. Chance of precipitation is 60%.

    Low: 57 °F

    Showers
    Likely then
    Partly Cloudy

Detailed Forecast

Tonight
Patchy fog after 4am. Otherwise, mostly clear, with a low around 53. North wind around 5 mph becoming calm in the evening.
Labor Day
Patchy fog before 9am. Otherwise, sunny, with a high near 77. Calm wind.
Monday Night
Patchy fog after 4am. Otherwise, increasing clouds, with a low around 52. Calm wind.
Tuesday
Patchy fog before 8am. Otherwise, mostly sunny, with a high near 80. Calm wind.
Tuesday Night
Partly cloudy, with a low around 59. Calm wind.
Wednesday
Partly sunny, with a high near 85.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 68. Chance of precipitation is 50%.
Thursday
Showers likely, mainly after 2pm. Mostly cloudy, with a high near 81. Chance of precipitation is 60%.
Thursday Night
Showers likely before 8pm. Mostly cloudy, with a low around 57. Chance of precipitation is 60%.
Friday
Mostly sunny, with a high near 76.
Friday Night
Mostly clear, with a low around 54.
Saturday
Mostly sunny, with a high near 79.
Saturday Night
Partly cloudy, with a low around 60.
Sunday
Partly sunny, with a high near 82.
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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:
2:21 pm EDT Sep 6, 2026
Forecast Valid:
5pm EDT Sep 6, 2026-6pm EDT Sep 13, 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