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

37°F

3°C

Humidity 100%
Wind Speed Calm
Barometer 30.17 in (1022.0 mb)
Dewpoint 37°F (3°C)
Visibility 1.75 mi
Last update 9 Jan 11:53 pm EST
Extended Forecast for

Herndon PA

  • Overnight

    Overnight: Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 36. North wind 3 to 5 mph.

    Low: 36 °F

    Patchy Fog

  • Saturday

    Saturday: Rain, mainly between 1pm and 5pm. Patchy fog before 9am. High near 43. Light and variable wind. Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 43 °F

    Chance Rain
    and Patchy
    Fog then Rain

  • Saturday Night

    Saturday Night: Rain likely, mainly between 7pm and 1am. Patchy fog before 4am. Otherwise, cloudy, then gradually becoming partly cloudy, with a low around 33. Calm wind becoming west around 6 mph after midnight. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 33 °F

    Rain Likely
    and Patchy
    Fog

  • Sunday

    Sunday: A slight chance of showers after 1pm. Mostly sunny, with a high near 39. West wind 6 to 14 mph, with gusts as high as 32 mph. Chance of precipitation is 20%.

    High: 39 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 27. West wind 8 to 10 mph, with gusts as high as 32 mph.

    Low: 27 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 39.

    High: 39 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 28.

    Low: 28 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 45.

    High: 45 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 33.

    Low: 33 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 36. North wind 3 to 5 mph.
Saturday
Rain, mainly between 1pm and 5pm. Patchy fog before 9am. High near 43. Light and variable wind. Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday Night
Rain likely, mainly between 7pm and 1am. Patchy fog before 4am. Otherwise, cloudy, then gradually becoming partly cloudy, with a low around 33. Calm wind becoming west around 6 mph after midnight. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Sunday
A slight chance of showers after 1pm. Mostly sunny, with a high near 39. West wind 6 to 14 mph, with gusts as high as 32 mph. Chance of precipitation is 20%.
Sunday Night
Partly cloudy, with a low around 27. West wind 8 to 10 mph, with gusts as high as 32 mph.
Monday
Mostly sunny, with a high near 39.
Monday Night
Partly cloudy, with a low around 28.
Tuesday
Mostly sunny, with a high near 45.
Tuesday Night
Mostly cloudy, with a low around 33.
Wednesday
Mostly cloudy, with a high near 45.
Wednesday Night
Mostly cloudy, with a low around 27.
Thursday
Partly sunny, with a high near 34.
Thursday Night
Mostly cloudy, with a low around 18.
Friday
Mostly sunny, with a high near 32.
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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:
9:51 pm EST Jan 9, 2026
Forecast Valid:
12am EST Jan 10, 2026-6pm EST Jan 16, 2026
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation