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

62°F

17°C

Humidity 96%
Wind Speed S 3 mph
Barometer 29.90 in (1012.1 mb)
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Last update 5 Nov 2:53 am EST
Extended Forecast for

Northumberland PA

  • Overnight

    Overnight: Rain. Low around 62. South wind around 7 mph. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 62 °F

    Rain

  • Thursday

    Thursday: Rain, mainly before 1pm. High near 73. South wind 5 to 9 mph, with gusts as high as 21 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    High: 73 °F

    Rain then
    Slight Chance
    Rain

  • Thursday Night

    Thursday Night: Patchy fog before 1am, then patchy fog after 2am. Otherwise, mostly cloudy, with a low around 51. Calm wind.

    Low: 51 °F

    Patchy Fog

  • Friday

    Friday: Patchy fog before 9am. Otherwise, partly sunny, with a high near 68. Light and variable wind.

    High: 68 °F

    Patchy Fog
    then Partly
    Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 44. Calm wind.

    Low: 44 °F

    Mostly Cloudy

  • Saturday

    Saturday: A chance of rain, mainly after 1pm. Partly sunny, with a high near 55. Chance of precipitation is 30%.

    High: 55 °F

    Chance Rain

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 41.

    Low: 41 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 61.

    High: 61 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 37.

    Low: 37 °F

    Mostly Clear

Detailed Forecast

Overnight
Rain. Low around 62. South wind around 7 mph. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.
Thursday
Rain, mainly before 1pm. High near 73. South wind 5 to 9 mph, with gusts as high as 21 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Thursday Night
Patchy fog before 1am, then patchy fog after 2am. Otherwise, mostly cloudy, with a low around 51. Calm wind.
Friday
Patchy fog before 9am. Otherwise, partly sunny, with a high near 68. Light and variable wind.
Friday Night
Mostly cloudy, with a low around 44. Calm wind.
Saturday
A chance of rain, mainly after 1pm. Partly sunny, with a high near 55. Chance of precipitation is 30%.
Saturday Night
Mostly cloudy, with a low around 41.
Sunday
Mostly sunny, with a high near 61.
Sunday Night
Mostly clear, with a low around 37.
Monday
Sunny, with a high near 60.
Monday Night
Mostly clear, with a low around 35.
Tuesday
Mostly sunny, with a high near 65.
Tuesday Night
Mostly clear, with a low around 35.
Veterans Day
Mostly sunny, with a high near 60.
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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:
1:21 am EST Nov 5, 2026
Forecast Valid:
3am EST Nov 5, 2026-6pm EST Nov 11, 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