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

63°F

17°C

Humidity 68%
Wind Speed S 3 mph
Barometer 30.13 in (1020.1 mb)
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Last update 15 Oct 6:53 pm EDT
Extended Forecast for

Herndon PA

  • Tonight

    Tonight: Showers, mainly after 3am. Low around 56. South wind 3 to 8 mph. Winds could gust as high as 22 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 56 °F

    Mostly Cloudy
    then Showers

  • Friday

    Friday: Showers and thunderstorms likely, then showers and possibly a thunderstorm after 3pm. High near 78. South wind 7 to 9 mph, with gusts as high as 24 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 78 °F

    Showers

  • Friday Night

    Friday Night: A chance of showers, mainly before 7pm. Mostly cloudy, with a low around 41. West wind 7 to 10 mph becoming north after midnight. Winds could gust as high as 26 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 41 °F

    Chance
    Showers then
    Mostly Cloudy

  • Saturday

    Saturday: Cloudy through mid morning, then gradual clearing, with a high near 51. North wind 10 to 13 mph, with gusts as high as 28 mph.

    High: 51 °F

    Gradual
    Clearing

  • Saturday Night

    Saturday Night: Widespread frost, mainly after 3am. Otherwise, clear, with a low around 33. Calm wind.

    Low: 33 °F

    Clear then
    Frost

  • Sunday

    Sunday: Widespread frost before 9am. Otherwise, sunny, with a high near 59.

    High: 59 °F

    Frost then
    Sunny

  • Sunday Night

    Sunday Night: Areas of frost after 4am. Otherwise, mostly clear, with a low around 35.

    Low: 35 °F

    Mostly Clear
    then Areas
    Frost

  • Monday

    Monday: Areas of frost before 9am. Otherwise, sunny, with a high near 63.

    High: 63 °F

    Areas Frost
    then Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 38.

    Low: 38 °F

    Mostly Clear

Detailed Forecast

Tonight
Showers, mainly after 3am. Low around 56. South wind 3 to 8 mph. Winds could gust as high as 22 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Friday
Showers and thunderstorms likely, then showers and possibly a thunderstorm after 3pm. High near 78. South wind 7 to 9 mph, with gusts as high as 24 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday Night
A chance of showers, mainly before 7pm. Mostly cloudy, with a low around 41. West wind 7 to 10 mph becoming north after midnight. Winds could gust as high as 26 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
Cloudy through mid morning, then gradual clearing, with a high near 51. North wind 10 to 13 mph, with gusts as high as 28 mph.
Saturday Night
Widespread frost, mainly after 3am. Otherwise, clear, with a low around 33. Calm wind.
Sunday
Widespread frost before 9am. Otherwise, sunny, with a high near 59.
Sunday Night
Areas of frost after 4am. Otherwise, mostly clear, with a low around 35.
Monday
Areas of frost before 9am. Otherwise, sunny, with a high near 63.
Monday Night
Mostly clear, with a low around 38.
Tuesday
Mostly sunny, with a high near 66.
Tuesday Night
Partly cloudy, with a low around 41.
Wednesday
Sunny, with a high near 66.
Wednesday Night
Mostly clear, with a low around 40.
Thursday
Sunny, with a high near 64.
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ABOUT THIS FORECAST

 
Point Forecast:
Herndon PA
 40.72°N 76.85°W (Elev. 397 ft)
Last Update:
2:21 pm EDT Oct 15, 2026
Forecast Valid:
7pm EDT Oct 15, 2026-6pm EDT Oct 22, 2026
 
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Additional Resources

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Chance of Precipitation