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

56°F

13°C

Humidity 72%
Wind Speed Calm
Barometer 29.80 in (1009.2 mb)
Dewpoint 47°F (8°C)
Visibility 10.00 mi
Last update 8 Nov 4:53 pm EST
Extended Forecast for

Northumberland PA

  • Tonight

    Tonight: A chance of showers, mainly before 3am. Mostly cloudy, with a low around 45. Calm wind. Chance of precipitation is 30%.

    Low: 45 °F

    Chance
    Showers

  • Sunday

    Sunday: Showers. High near 62. Calm wind becoming southeast around 6 mph in the morning. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 62 °F

    Showers

  • Sunday Night

    Sunday Night: A chance of showers. Mostly cloudy, with a low around 36. Southwest wind around 6 mph becoming northwest after midnight. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 36 °F

    Chance
    Showers

  • Monday

    Monday: A slight chance of showers. Mostly cloudy, with a high near 45. Northwest wind 6 to 8 mph. Chance of precipitation is 20%.

    High: 45 °F

    Slight Chance
    Showers

  • Monday Night

    Monday Night: A slight chance of snow showers. Mostly cloudy, with a low around 26. West wind around 7 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

    Low: 26 °F

    Slight Chance
    Snow Showers

  • Veterans Day

    Veterans Day: Partly sunny, with a high near 43.

    High: 43 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 31.

    Low: 31 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 50.

    High: 50 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: A chance of showers before 1am. Mostly cloudy, with a low around 36. Chance of precipitation is 30%.

    Low: 36 °F

    Chance
    Showers

Detailed Forecast

Tonight
A chance of showers, mainly before 3am. Mostly cloudy, with a low around 45. Calm wind. Chance of precipitation is 30%.
Sunday
Showers. High near 62. Calm wind becoming southeast around 6 mph in the morning. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday Night
A chance of showers. Mostly cloudy, with a low around 36. Southwest wind around 6 mph becoming northwest after midnight. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.
Monday
A slight chance of showers. Mostly cloudy, with a high near 45. Northwest wind 6 to 8 mph. Chance of precipitation is 20%.
Monday Night
A slight chance of snow showers. Mostly cloudy, with a low around 26. West wind around 7 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Veterans Day
Partly sunny, with a high near 43.
Tuesday Night
Mostly cloudy, with a low around 31.
Wednesday
Mostly cloudy, with a high near 50.
Wednesday Night
A chance of showers before 1am. Mostly cloudy, with a low around 36. Chance of precipitation is 30%.
Thursday
Partly sunny, with a high near 50.
Thursday Night
Partly cloudy, with a low around 34.
Friday
Partly sunny, with a high near 50.
Friday Night
Partly cloudy, with a low around 31.
Saturday
Partly sunny, with a high near 51.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Northumberland PA
 40.89°N 76.79°W (Elev. 482 ft)
Last Update:
2:41 pm EST Nov 8, 2025
Forecast Valid:
4pm EST Nov 8, 2025-6pm EST Nov 15, 2025
 
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