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 with Haze

68°F

20°C

Humidity 81%
Wind Speed Calm
Barometer 29.66 in (1004.0 mb)
Dewpoint 62°F (17°C)
Visibility 4.00 mi
Last update 18 Jun 2:53 am EDT
Extended Forecast for

Herndon PA

  • Overnight

    Overnight: A slight chance of showers before 4am, then a chance of showers and thunderstorms after 5am. Cloudy, with a low around 63. South wind around 9 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 63 °F

    Chance
    Showers

  • Thursday

    Thursday: Showers and thunderstorms likely, mainly before 9am. Partly sunny, with a high near 86. South wind 14 to 17 mph, with gusts as high as 38 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 86 °F

    Showers
    Likely then
    Partly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 60. West wind 5 to 10 mph becoming light after midnight. Winds could gust as high as 28 mph.

    Low: 60 °F

    Partly Cloudy

  • Juneteenth

    Juneteenth: Sunny, with a high near 81. West wind 5 to 10 mph, with gusts as high as 22 mph.

    High: 81 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 58. West wind 3 to 8 mph. Winds could gust as high as 20 mph.

    Low: 58 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 80.

    High: 80 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 57.

    Low: 57 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 82.

    High: 82 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Showers likely, mainly after 2am. Mostly cloudy, with a low around 60. Chance of precipitation is 60%.

    Low: 60 °F

    Chance
    Showers then
    Showers
    Likely

Detailed Forecast

Overnight
A slight chance of showers before 4am, then a chance of showers and thunderstorms after 5am. Cloudy, with a low around 63. South wind around 9 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday
Showers and thunderstorms likely, mainly before 9am. Partly sunny, with a high near 86. South wind 14 to 17 mph, with gusts as high as 38 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday Night
Partly cloudy, with a low around 60. West wind 5 to 10 mph becoming light after midnight. Winds could gust as high as 28 mph.
Juneteenth
Sunny, with a high near 81. West wind 5 to 10 mph, with gusts as high as 22 mph.
Friday Night
Mostly clear, with a low around 58. West wind 3 to 8 mph. Winds could gust as high as 20 mph.
Saturday
Sunny, with a high near 80.
Saturday Night
Mostly clear, with a low around 57.
Sunday
Mostly sunny, with a high near 82.
Sunday Night
Showers likely, mainly after 2am. Mostly cloudy, with a low around 60. Chance of precipitation is 60%.
Monday
Showers, with thunderstorms also possible after 2pm. High near 78. Chance of precipitation is 80%.
Monday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 57. Chance of precipitation is 60%.
Tuesday
Mostly sunny, with a high near 80.
Tuesday Night
Mostly clear, with a low around 56.
Wednesday
Sunny, with a high near 82.
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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:
2:31 am EDT Jun 18, 2026
Forecast Valid:
3am EDT Jun 18, 2026-6pm EDT Jun 24, 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