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.

Fog

69°F

21°C

Humidity 100%
Wind Speed Calm
Barometer 30.06 in (1017.4 mb)
Dewpoint 69°F (21°C)
Visibility 0.25 mi
Last update 2 Sep 4:53 am EDT
Extended Forecast for

2 Miles SW Herndon PA

  • Today

    Today: A chance of showers and thunderstorms before 4pm, then a slight chance of showers and thunderstorms after 5pm. Some of the storms could be severe. Patchy fog before 9am. Otherwise, mostly cloudy, with a high near 81. Light south wind. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 81 °F

    Chance
    Showers and
    Patchy Fog
    then Severe
    Thunderstorms

  • Tonight

    Tonight: Showers and thunderstorms, mainly before midnight. Some of the storms could be severe. Low around 69. South wind around 6 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 69 °F

    Severe
    Thunderstorms

  • Thursday

    Thursday: A chance of showers and thunderstorms, mainly before 2pm. Partly sunny, with a high near 87. Calm wind becoming west around 6 mph in the afternoon. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 87 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms before 2am, then a slight chance of showers. Mostly cloudy, with a low around 69. Light northwest wind. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 69 °F

    Chance
    T-storms then
    Chance
    Showers

  • Friday

    Friday: A slight chance of showers before 8am, then a chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 82. Calm wind becoming northwest around 5 mph in the afternoon. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 82 °F

    Partly Sunny
    then Chance
    Showers

  • Friday Night

    Friday Night: A chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 59. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 59 °F

    Chance
    Showers then
    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 77.

    High: 77 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 54.

    Low: 54 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 74.

    High: 74 °F

    Sunny

Detailed Forecast

Today
A chance of showers and thunderstorms before 4pm, then a slight chance of showers and thunderstorms after 5pm. Some of the storms could be severe. Patchy fog before 9am. Otherwise, mostly cloudy, with a high near 81. Light south wind. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tonight
Showers and thunderstorms, mainly before midnight. Some of the storms could be severe. Low around 69. South wind around 6 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Thursday
A chance of showers and thunderstorms, mainly before 2pm. Partly sunny, with a high near 87. Calm wind becoming west around 6 mph in the afternoon. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday Night
A chance of showers and thunderstorms before 2am, then a slight chance of showers. Mostly cloudy, with a low around 69. Light northwest wind. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday
A slight chance of showers before 8am, then a chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 82. Calm wind becoming northwest around 5 mph in the afternoon. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday Night
A chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 59. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday
Sunny, with a high near 77.
Saturday Night
Mostly clear, with a low around 54.
Sunday
Sunny, with a high near 74.
Sunday Night
Partly cloudy, with a low around 54.
Labor Day
Mostly sunny, with a high near 77.
Monday Night
Partly cloudy, with a low around 57.
Tuesday
Partly sunny, with a high near 77.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SW Herndon PA
 40.7°N 76.88°W (Elev. 482 ft)
Last Update:
3:41 am EDT Sep 2, 2026
Forecast Valid:
5am EDT Sep 2, 2026-6pm EDT Sep 8, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation