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.

A Few Clouds

32°F

0°C

Humidity 82%
Wind Speed Calm
Barometer 30.05 in (1017.9 mb)
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Last update 7 Dec 5:53 pm EST
Extended Forecast for

Herndon PA

  • Tonight

    Tonight: Partly cloudy, with a low around 20. Calm wind becoming north 5 to 9 mph after midnight. Winds could gust as high as 21 mph.

    Low: 20 °F

    Partly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 28. North wind 5 to 11 mph, with gusts as high as 21 mph.

    High: 28 °F

    Partly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 8. Calm wind.

    Low: 8 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 32. Calm wind becoming south 5 to 8 mph in the afternoon.

    High: 32 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: A slight chance of snow after 1am. Mostly cloudy, with a low around 25. South wind around 6 mph becoming calm in the evening. Chance of precipitation is 20%.

    Low: 25 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • Wednesday

    Wednesday: Rain likely. Cloudy, with a high near 45. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 45 °F

    Rain Likely

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 29.

    Low: 29 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 38.

    High: 38 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: A chance of snow showers. Mostly cloudy, with a low around 24. Chance of precipitation is 40%.

    Low: 24 °F

    Chance Snow
    Showers

Detailed Forecast

Tonight
Partly cloudy, with a low around 20. Calm wind becoming north 5 to 9 mph after midnight. Winds could gust as high as 21 mph.
Monday
Partly sunny, with a high near 28. North wind 5 to 11 mph, with gusts as high as 21 mph.
Monday Night
Partly cloudy, with a low around 8. Calm wind.
Tuesday
Mostly cloudy, with a high near 32. Calm wind becoming south 5 to 8 mph in the afternoon.
Tuesday Night
A slight chance of snow after 1am. Mostly cloudy, with a low around 25. South wind around 6 mph becoming calm in the evening. Chance of precipitation is 20%.
Wednesday
Rain likely. Cloudy, with a high near 45. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday Night
Mostly cloudy, with a low around 29.
Thursday
Partly sunny, with a high near 38.
Thursday Night
A chance of snow showers. Mostly cloudy, with a low around 24. Chance of precipitation is 40%.
Friday
A chance of snow showers before 1pm. Mostly cloudy, with a high near 35. Chance of precipitation is 30%.
Friday Night
A chance of snow showers. Mostly cloudy, with a low around 18. Chance of precipitation is 30%.
Saturday
Mostly cloudy, with a high near 29.
Saturday Night
Mostly cloudy, with a low around 16.
Sunday
Partly sunny, with a high near 28.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Herndon PA
 40.72°N 76.85°W (Elev. 397 ft)
Last Update:
6:06 pm EST Dec 7, 2025
Forecast Valid:
6pm EST Dec 7, 2025-6pm EST Dec 14, 2025
 
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