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.

Fair

42°F

6°C

Humidity 85%
Wind Speed Calm
Barometer 30.00 in (1016.1 mb)
Dewpoint 38°F (3°C)
Visibility 10.00 mi
Last update 11 Nov 8:53 am EST
Extended Forecast for

Northumberland PA

  • Veterans Day

    Veterans Day: Mostly cloudy, with a high near 63. Calm wind.

    High: 63 °F

    Mostly Cloudy

  • Tonight

    Tonight: Rain likely, mainly after 4am. Cloudy, with a low around 44. Calm wind. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 44 °F

    Rain Likely

  • Thursday

    Thursday: Rain, mainly before 2pm. High near 56. Calm wind becoming northwest around 6 mph in the afternoon. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    High: 56 °F

    Rain

  • Thursday Night

    Thursday Night: A chance of rain before 4am, then a chance of rain and snow. Mostly cloudy, with a low around 36. Northwest wind 8 to 10 mph, with gusts as high as 28 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 36 °F

    Chance Rain
    then Chance
    Rain/Snow

  • Friday

    Friday: A chance of rain and snow showers before 10am, then a chance of rain showers between 10am and 1pm. Mostly cloudy, with a high near 47. Northwest wind around 10 mph, with gusts as high as 26 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    High: 47 °F

    Chance
    Rain/Snow
    then Chance
    Showers

  • Friday Night

    Friday Night: A slight chance of snow showers after 1am. Mostly cloudy, with a low around 31. Chance of precipitation is 20%.

    Low: 31 °F

    Mostly Cloudy
    then Slight
    Chance Snow
    Showers

  • Saturday

    Saturday: Partly sunny, with a high near 47.

    High: 47 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 32.

    Low: 32 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 50.

    High: 50 °F

    Partly Sunny

Detailed Forecast

Veterans Day
Mostly cloudy, with a high near 63. Calm wind.
Tonight
Rain likely, mainly after 4am. Cloudy, with a low around 44. Calm wind. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Thursday
Rain, mainly before 2pm. High near 56. Calm wind becoming northwest around 6 mph in the afternoon. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Thursday Night
A chance of rain before 4am, then a chance of rain and snow. Mostly cloudy, with a low around 36. Northwest wind 8 to 10 mph, with gusts as high as 28 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.
Friday
A chance of rain and snow showers before 10am, then a chance of rain showers between 10am and 1pm. Mostly cloudy, with a high near 47. Northwest wind around 10 mph, with gusts as high as 26 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Friday Night
A slight chance of snow showers after 1am. Mostly cloudy, with a low around 31. Chance of precipitation is 20%.
Saturday
Partly sunny, with a high near 47.
Saturday Night
Mostly cloudy, with a low around 32.
Sunday
Partly sunny, with a high near 50.
Sunday Night
Partly cloudy, with a low around 32.
Monday
Mostly sunny, with a high near 51.
Monday Night
Partly cloudy, with a low around 28.
Tuesday
Mostly sunny, with a high near 52.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Northumberland PA
 40.89°N 76.79°W (Elev. 482 ft)
Last Update:
7:06 am EST Nov 11, 2026
Forecast Valid:
9am EST Nov 11, 2026-6pm EST Nov 17, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation