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

39°F

4°C

Humidity 96%
Wind Speed Calm
Barometer 30.00 in (1016.0 mb)
Dewpoint 38°F (3°C)
Visibility 10.00 mi
Last update 10 Mar 1:53 am EDT
Extended Forecast for

Herndon PA

  • Overnight

    Overnight: Clear, with a low around 43. Calm wind.

    Low: 43 °F

    Clear

  • Tuesday

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

    High: 73 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A slight chance of showers between 4am and 5am. Partly cloudy, with a low around 54. Calm wind. Chance of precipitation is 20%.

    Low: 54 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Wednesday

    Wednesday: Showers likely, then showers and possibly a thunderstorm after 11am. Patchy fog before 9am. High near 74. Calm wind becoming south 5 to 9 mph in the afternoon. Winds could gust as high as 22 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 74 °F

    Showers and
    Patchy Fog

  • Wednesday Night

    Wednesday Night: Showers. Low around 40. South wind 7 to 10 mph, with gusts as high as 23 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 40 °F

    Showers

  • Thursday

    Thursday: A chance of rain showers, mixing with snow after 11am, then gradually ending. Mostly cloudy, with a high near 47. Chance of precipitation is 30%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 47 °F

    Chance
    Rain/Snow

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 28.

    Low: 28 °F

    Mostly Clear

  • Friday

    Friday: A chance of showers after 2pm. Mostly cloudy, with a high near 47. Chance of precipitation is 30%.

    High: 47 °F

    Partly Sunny
    then Chance
    Showers

  • Friday Night

    Friday Night: A chance of showers before 8pm. Mostly cloudy, with a low around 33. Chance of precipitation is 30%.

    Low: 33 °F

    Chance
    Showers then
    Mostly Cloudy

Detailed Forecast

Overnight
Clear, with a low around 43. Calm wind.
Tuesday
Sunny, with a high near 73. Calm wind becoming southwest around 6 mph in the afternoon.
Tuesday Night
A slight chance of showers between 4am and 5am. Partly cloudy, with a low around 54. Calm wind. Chance of precipitation is 20%.
Wednesday
Showers likely, then showers and possibly a thunderstorm after 11am. Patchy fog before 9am. High near 74. Calm wind becoming south 5 to 9 mph in the afternoon. Winds could gust as high as 22 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
Showers. Low around 40. South wind 7 to 10 mph, with gusts as high as 23 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday
A chance of rain showers, mixing with snow after 11am, then gradually ending. Mostly cloudy, with a high near 47. Chance of precipitation is 30%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday Night
Mostly clear, with a low around 28.
Friday
A chance of showers after 2pm. Mostly cloudy, with a high near 47. Chance of precipitation is 30%.
Friday Night
A chance of showers before 8pm. Mostly cloudy, with a low around 33. Chance of precipitation is 30%.
Saturday
Mostly sunny, with a high near 48.
Saturday Night
Mostly cloudy, with a low around 34.
Sunday
Cloudy, with a high near 59.
Sunday Night
Showers. Low around 37. Chance of precipitation is 80%.
Monday
Showers. High near 47. Chance of precipitation is 80%.
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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:
1:36 am EDT Mar 10, 2026
Forecast Valid:
2am EDT Mar 10, 2026-6pm EDT Mar 16, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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