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.

Fog/Mist

50°F

10°C

Humidity 96%
Wind Speed SW 3 mph
Barometer 29.78 in (1008.5 mb)
Dewpoint 49°F (9°C)
Visibility 2.50 mi
Last update 8 Mar 3:53 am EDT
Extended Forecast for

Herndon PA

  • Today

    Today: Cloudy through mid morning, then gradual clearing, with a high near 62. West wind 3 to 8 mph. Winds could gust as high as 20 mph.

    High: 62 °F

    Gradual
    Clearing

  • Tonight

    Tonight: Mostly clear, with a low around 39. Calm wind.

    Low: 39 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 68. Calm wind becoming southwest 5 to 8 mph in the afternoon.

    High: 68 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 42. Calm wind.

    Low: 42 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 73. Calm wind becoming south around 6 mph in the afternoon.

    High: 73 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A slight chance of showers after 2am. Partly cloudy, with a low around 52. Chance of precipitation is 20%.

    Low: 52 °F

    Mostly Clear
    then Slight
    Chance
    Showers

  • Wednesday

    Wednesday: Showers likely, mainly between 8am and 2pm. Mostly cloudy, with a high near 73. Chance of precipitation is 60%.

    High: 73 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: Showers, mainly after 2am. Low around 46. Chance of precipitation is 80%.

    Low: 46 °F

    Chance
    Showers then
    Showers

  • Thursday

    Thursday: Showers, mainly before 8am. High near 49. Chance of precipitation is 80%.

    High: 49 °F

    Showers then
    Chance
    Showers

Detailed Forecast

Today
Cloudy through mid morning, then gradual clearing, with a high near 62. West wind 3 to 8 mph. Winds could gust as high as 20 mph.
Tonight
Mostly clear, with a low around 39. Calm wind.
Monday
Sunny, with a high near 68. Calm wind becoming southwest 5 to 8 mph in the afternoon.
Monday Night
Clear, with a low around 42. Calm wind.
Tuesday
Sunny, with a high near 73. Calm wind becoming south around 6 mph in the afternoon.
Tuesday Night
A slight chance of showers after 2am. Partly cloudy, with a low around 52. Chance of precipitation is 20%.
Wednesday
Showers likely, mainly between 8am and 2pm. Mostly cloudy, with a high near 73. Chance of precipitation is 60%.
Wednesday Night
Showers, mainly after 2am. Low around 46. Chance of precipitation is 80%.
Thursday
Showers, mainly before 8am. High near 49. Chance of precipitation is 80%.
Thursday Night
Mostly clear, with a low around 27.
Friday
A chance of showers. Partly sunny, with a high near 49. Chance of precipitation is 30%.
Friday Night
A chance of showers. Mostly cloudy, with a low around 36. Chance of precipitation is 30%.
Saturday
Mostly sunny, with a high near 49.
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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:
4:01 am EDT Mar 8, 2026
Forecast Valid:
4am EDT Mar 8, 2026-6pm EDT Mar 14, 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