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

74°F

23°C

Humidity 50%
Wind Speed Vrbl 3 mph
Barometer 29.85 in (1010.4 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 20 Jun 5:53 pm EDT
Extended Forecast for

2 Miles ENE Northumberland PA

  • Tonight

    Tonight: A slight chance of showers and thunderstorms before 8pm, then a slight chance of showers between 8pm and 9pm. Partly cloudy, with a low around 57. West wind 5 to 8 mph becoming calm in the evening. Winds could gust as high as 21 mph. Chance of precipitation is 20%.

    Low: 57 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 80. Calm wind becoming west 5 to 7 mph in the morning.

    High: 80 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 59. Calm wind.

    Low: 59 °F

    Mostly Cloudy

  • Monday

    Monday: Showers, with thunderstorms also possible after 2pm. Some of the storms could produce heavy rainfall. High near 73. Calm wind becoming southeast around 6 mph in the afternoon. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.

    High: 73 °F

    Heavy Rain

  • Monday Night

    Monday Night: Showers and possibly a thunderstorm before 2am, then a chance of showers. Low around 61. Calm wind becoming northwest around 5 mph after midnight. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 61 °F

    Showers

  • Tuesday

    Tuesday: A chance of showers before 8am. Partly sunny, with a high near 79. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    High: 79 °F

    Chance
    Showers then
    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 57.

    Low: 57 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 81.

    High: 81 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 60.

    Low: 60 °F

    Partly Cloudy

Detailed Forecast

Tonight
A slight chance of showers and thunderstorms before 8pm, then a slight chance of showers between 8pm and 9pm. Partly cloudy, with a low around 57. West wind 5 to 8 mph becoming calm in the evening. Winds could gust as high as 21 mph. Chance of precipitation is 20%.
Sunday
Mostly sunny, with a high near 80. Calm wind becoming west 5 to 7 mph in the morning.
Sunday Night
Mostly cloudy, with a low around 59. Calm wind.
Monday
Showers, with thunderstorms also possible after 2pm. Some of the storms could produce heavy rainfall. High near 73. Calm wind becoming southeast around 6 mph in the afternoon. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.
Monday Night
Showers and possibly a thunderstorm before 2am, then a chance of showers. Low around 61. Calm wind becoming northwest around 5 mph after midnight. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday
A chance of showers before 8am. Partly sunny, with a high near 79. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday Night
Mostly clear, with a low around 57.
Wednesday
Sunny, with a high near 81.
Wednesday Night
Partly cloudy, with a low around 60.
Thursday
Showers likely and possibly a thunderstorm, mainly after 2pm. Partly sunny, with a high near 82. Chance of precipitation is 60%.
Thursday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 61. Chance of precipitation is 60%.
Friday
A chance of showers and thunderstorms. Partly sunny, with a high near 82. Chance of precipitation is 40%.
Friday Night
A chance of thunderstorms. Partly cloudy, with a low around 60. Chance of precipitation is 30%.
Saturday
Mostly sunny, with a high near 82.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles ENE Northumberland PA
 40.91°N 76.76°W (Elev. 499 ft)
Last Update:
3:11 pm EDT Jun 20, 2026
Forecast Valid:
6pm EDT Jun 20, 2026-6pm EDT Jun 27, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation