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

43°F

6°C

Humidity 82%
Wind Speed N 3 mph
Barometer 30.25 in (1024.7 mb)
Dewpoint 38°F (3°C)
Visibility 9.00 mi
Last update 4 Mar 1:53 pm EST
Extended Forecast for

Shamokin Dam PA

  • This Afternoon

    This Afternoon: A slight chance of rain. Mostly cloudy, with a high near 46. Calm wind. Chance of precipitation is 20%.

    High: 46 °F

    Slight Chance
    Rain

  • Tonight

    Tonight: Rain, mainly after 2am. Patchy fog after 3am. Low around 42. Calm wind. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 42 °F

    Cloudy then
    Rain and
    Patchy Fog

  • Thursday

    Thursday: Rain. Patchy fog before 1pm. High near 50. Light and variable wind. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.

    High: 50 °F

    Rain and
    Patchy Fog

  • Thursday Night

    Thursday Night: Rain and possibly a thunderstorm. Low around 42. Calm wind. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 42 °F

    Rain

  • Friday

    Friday: A slight chance of showers before 1pm. Mostly cloudy, with a high near 52. Calm wind becoming southeast around 5 mph. Chance of precipitation is 20%.

    High: 52 °F

    Slight Chance
    Showers

  • Friday Night

    Friday Night: A slight chance of showers before 1am. Cloudy, with a low around 42. Chance of precipitation is 20%.

    Low: 42 °F

    Slight Chance
    Showers

  • Saturday

    Saturday: Showers likely after 1pm. Mostly cloudy, with a high near 65. Chance of precipitation is 60%.

    High: 65 °F

    Mostly Cloudy
    then Showers
    Likely

  • Saturday Night

    Saturday Night: Showers likely before 1am. Mostly cloudy, with a low around 46. Chance of precipitation is 60%.

    Low: 46 °F

    Showers
    Likely

  • Sunday

    Sunday: Mostly sunny, with a high near 60.

    High: 60 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
A slight chance of rain. Mostly cloudy, with a high near 46. Calm wind. Chance of precipitation is 20%.
Tonight
Rain, mainly after 2am. Patchy fog after 3am. Low around 42. Calm wind. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Thursday
Rain. Patchy fog before 1pm. High near 50. Light and variable wind. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.
Thursday Night
Rain and possibly a thunderstorm. Low around 42. Calm wind. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Friday
A slight chance of showers before 1pm. Mostly cloudy, with a high near 52. Calm wind becoming southeast around 5 mph. Chance of precipitation is 20%.
Friday Night
A slight chance of showers before 1am. Cloudy, with a low around 42. Chance of precipitation is 20%.
Saturday
Showers likely after 1pm. Mostly cloudy, with a high near 65. Chance of precipitation is 60%.
Saturday Night
Showers likely before 1am. Mostly cloudy, with a low around 46. Chance of precipitation is 60%.
Sunday
Mostly sunny, with a high near 60.
Sunday Night
Mostly clear, with a low around 42.
Monday
Sunny, with a high near 63.
Monday Night
Partly cloudy, with a low around 47.
Tuesday
Mostly sunny, with a high near 73.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Shamokin Dam PA
 40.85°N 76.83°W (Elev. 499 ft)
Last Update:
2:21 pm EST Mar 4, 2026
Forecast Valid:
2pm EST Mar 4, 2026-6pm EDT Mar 10, 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