National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Selinsgrove Penn Valley Airport (KSEG)

Lat: 40.82°NLon: 76.87°WElev: 443ft.

Overcast

27°F

-3°C

Humidity 85%
Wind Speed Calm
Barometer 29.98 in (1015.7 mb)
Dewpoint 23°F (-5°C)
Visibility 10.00 mi
Last update 17 Jan 5:53 am EST
Extended Forecast for

Herndon PA

  • Today

    Today: Snow likely, mainly before 11am. Cloudy, then gradually becoming mostly sunny, with a high near 42. Light and variable wind becoming south around 6 mph. Chance of precipitation is 70%. Total daytime snow accumulation of 1 to 2 inches possible.

    High: 42 °F

    Snow Likely
    then Partly
    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 26. Calm wind.

    Low: 26 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Mostly cloudy, with a high near 32. Calm wind becoming west around 6 mph in the afternoon.

    High: 32 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 17. Calm wind.

    Low: 17 °F

    Partly Cloudy

  • M.L.King Day

    M.L.King Day: Mostly sunny, with a high near 32. Light southwest wind becoming west 6 to 11 mph in the morning. Winds could gust as high as 26 mph.

    High: 32 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 9.

    Low: 9 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 20.

    High: 20 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 9.

    Low: 9 °F

    Mostly Clear

  • Wednesday

    Wednesday: Partly sunny, with a high near 34.

    High: 34 °F

    Partly Sunny

Detailed Forecast

Today
Snow likely, mainly before 11am. Cloudy, then gradually becoming mostly sunny, with a high near 42. Light and variable wind becoming south around 6 mph. Chance of precipitation is 70%. Total daytime snow accumulation of 1 to 2 inches possible.
Tonight
Increasing clouds, with a low around 26. Calm wind.
Sunday
Mostly cloudy, with a high near 32. Calm wind becoming west around 6 mph in the afternoon.
Sunday Night
Partly cloudy, with a low around 17. Calm wind.
M.L.King Day
Mostly sunny, with a high near 32. Light southwest wind becoming west 6 to 11 mph in the morning. Winds could gust as high as 26 mph.
Monday Night
Partly cloudy, with a low around 9.
Tuesday
Mostly sunny, with a high near 20.
Tuesday Night
Mostly clear, with a low around 9.
Wednesday
Partly sunny, with a high near 34.
Wednesday Night
Mostly cloudy, with a low around 25.
Thursday
Mostly cloudy, with a high near 36.
Thursday Night
Mostly cloudy, with a low around 18.
Friday
Mostly sunny, with a high near 30.
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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:
1:26 am EST Jan 17, 2026
Forecast Valid:
6am EST Jan 17, 2026-6pm EST Jan 23, 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