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.

Overcast

70°F

21°C

Humidity 90%
Wind Speed N 5 mph
Barometer 29.90 in (1012.0 mb)
Dewpoint 67°F (19°C)
Visibility 10.00 mi
Last update 5 Sep 2:53 am EDT
Extended Forecast for

Shamokin Dam PA

  • Overnight

    Overnight: Mostly cloudy, with a low around 65. Calm wind.

    Low: 65 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 78. Calm wind becoming north around 6 mph in the afternoon.

    High: 78 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 56. Light north wind.

    Low: 56 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 76. Calm wind becoming north around 6 mph in the morning.

    High: 76 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Patchy fog after 2am. Otherwise, mostly clear, with a low around 53. Light north wind.

    Low: 53 °F

    Mostly Clear
    then Patchy
    Fog

  • Labor Day

    Labor Day: Patchy fog before 9am. Otherwise, sunny, with a high near 76.

    High: 76 °F

    Patchy Fog
    then Sunny

  • Monday Night

    Monday Night: Patchy fog after 3am. Otherwise, mostly clear, with a low around 54.

    Low: 54 °F

    Mostly Clear
    then Patchy
    Fog

  • Tuesday

    Tuesday: Patchy fog before 9am. Otherwise, mostly sunny, with a high near 80.

    High: 80 °F

    Patchy Fog
    then Mostly
    Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 60.

    Low: 60 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 65. Calm wind.
Saturday
Mostly sunny, with a high near 78. Calm wind becoming north around 6 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 56. Light north wind.
Sunday
Mostly sunny, with a high near 76. Calm wind becoming north around 6 mph in the morning.
Sunday Night
Patchy fog after 2am. Otherwise, mostly clear, with a low around 53. Light north wind.
Labor Day
Patchy fog before 9am. Otherwise, sunny, with a high near 76.
Monday Night
Patchy fog after 3am. Otherwise, mostly clear, with a low around 54.
Tuesday
Patchy fog before 9am. Otherwise, mostly sunny, with a high near 80.
Tuesday Night
Mostly cloudy, with a low around 60.
Wednesday
Partly sunny, with a high near 85.
Wednesday Night
A chance of showers. Partly cloudy, with a low around 68. Chance of precipitation is 30%.
Thursday
Partly sunny, with a high near 79.
Thursday Night
Mostly cloudy, with a low around 57.
Friday
Mostly sunny, with a high near 75.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Shamokin Dam PA
 40.87°N 76.85°W (Elev. 712 ft)
Last Update:
2:21 am EDT Sep 5, 2026
Forecast Valid:
3am EDT Sep 5, 2026-6pm EDT Sep 11, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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