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.

Partly Cloudy

68°F

20°C

Humidity 87%
Wind Speed Calm
Barometer 29.93 in (1013.5 mb)
Dewpoint 64°F (18°C)
Visibility 9.00 mi
Last update 14 Oct 11:53 am EDT
Extended Forecast for

Herndon PA

  • This Afternoon

    This Afternoon: Mostly cloudy, with a high near 79. West wind around 6 mph.

    High: 79 °F

    Mostly Cloudy

  • Tonight

    Tonight: Mostly cloudy, with a low around 51. North wind 3 to 5 mph.

    Low: 51 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 67. Calm wind.

    High: 67 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A chance of showers, then showers and possibly a thunderstorm after 2am. Low around 54. Calm wind becoming south 5 to 8 mph after midnight. Winds could gust as high as 23 mph. Chance of precipitation is 90%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 54 °F

    Chance
    Showers then
    Showers

  • Friday

    Friday: Showers and possibly a thunderstorm. High near 75. South wind 8 to 10 mph, with gusts as high as 26 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 75 °F

    Showers

  • Friday Night

    Friday Night: Showers before 8pm. Low around 39. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 39 °F

    Showers then
    Mostly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 53.

    High: 53 °F

    Sunny

  • Saturday Night

    Saturday Night: Widespread frost, mainly after 5am. Otherwise, clear, with a low around 33.

    Low: 33 °F

    Clear then
    Frost

  • Sunday

    Sunday: Widespread frost before 9am. Otherwise, sunny, with a high near 62.

    High: 62 °F

    Frost then
    Sunny

Detailed Forecast

This Afternoon
Mostly cloudy, with a high near 79. West wind around 6 mph.
Tonight
Mostly cloudy, with a low around 51. North wind 3 to 5 mph.
Thursday
Mostly sunny, with a high near 67. Calm wind.
Thursday Night
A chance of showers, then showers and possibly a thunderstorm after 2am. Low around 54. Calm wind becoming south 5 to 8 mph after midnight. Winds could gust as high as 23 mph. Chance of precipitation is 90%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday
Showers and possibly a thunderstorm. High near 75. South wind 8 to 10 mph, with gusts as high as 26 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday Night
Showers before 8pm. Low around 39. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
Sunny, with a high near 53.
Saturday Night
Widespread frost, mainly after 5am. Otherwise, clear, with a low around 33.
Sunday
Widespread frost before 9am. Otherwise, sunny, with a high near 62.
Sunday Night
Mostly clear, with a low around 35.
Monday
Patchy frost. Otherwise, mostly sunny, with a high near 65.
Monday Night
Partly cloudy, with a low around 41.
Tuesday
Partly sunny, with a high near 67.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Herndon PA
 40.72°N 76.85°W (Elev. 397 ft)
Last Update:
8:06 am EDT Oct 14, 2026
Forecast Valid:
12pm EDT Oct 14, 2026-6pm EDT Oct 20, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation