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.

A Few Clouds

68°F

20°C

Humidity 93%
Wind Speed Calm
Barometer 29.95 in (1014.0 mb)
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Last update 19 Aug 9:53 pm EDT
Extended Forecast for

3 Miles NE Thompsontown PA

  • Tonight

    Tonight: Mostly cloudy, with a low around 63. Calm wind.

    Low: 63 °F

    Mostly Cloudy

  • Thursday

    Thursday: Showers and thunderstorms before 3pm, then showers likely and possibly a thunderstorm between 3pm and 4pm, then a chance of showers and thunderstorms after 4pm. Patchy fog before 7am. High near 72. Light and variable wind. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 72 °F

    Showers and
    Patchy Fog

  • Thursday Night

    Thursday Night: Patchy fog after midnight. Otherwise, mostly cloudy, with a low around 57. Calm wind.

    Low: 57 °F

    Mostly Cloudy
    then Patchy
    Fog

  • Friday

    Friday: A slight chance of showers after 2pm. Areas of fog before 10am. Otherwise, mostly sunny, with a high near 76. Calm wind. Chance of precipitation is 20%.

    High: 76 °F

    Areas Fog
    then Slight
    Chance
    Showers

  • Friday Night

    Friday Night: A chance of showers, mainly between 8pm and 2am. Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 62. Calm wind. Chance of precipitation is 30%.

    Low: 62 °F

    Chance
    Showers and
    Patchy Fog

  • Saturday

    Saturday: A chance of showers before 11am, then a chance of showers and thunderstorms between 11am and 2pm, then showers likely and possibly a thunderstorm after 2pm. Patchy fog before 8am. Otherwise, mostly cloudy, with a high near 76. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 76 °F

    Chance
    Showers and
    Patchy Fog
    then Showers
    Likely

  • Saturday Night

    Saturday Night: Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am. Mostly cloudy, with a low around 62. Chance of precipitation is 60%.

    Low: 62 °F

    Showers
    Likely then
    Chance
    T-storms

  • Sunday

    Sunday: A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 76. Chance of precipitation is 30%.

    High: 76 °F

    Mostly Sunny
    then Chance
    T-storms

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms before 8pm. Mostly clear, with a low around 58. Chance of precipitation is 30%.

    Low: 58 °F

    Chance
    T-storms then
    Mostly Clear

Detailed Forecast

Tonight
Mostly cloudy, with a low around 63. Calm wind.
Thursday
Showers and thunderstorms before 3pm, then showers likely and possibly a thunderstorm between 3pm and 4pm, then a chance of showers and thunderstorms after 4pm. Patchy fog before 7am. High near 72. Light and variable wind. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Thursday Night
Patchy fog after midnight. Otherwise, mostly cloudy, with a low around 57. Calm wind.
Friday
A slight chance of showers after 2pm. Areas of fog before 10am. Otherwise, mostly sunny, with a high near 76. Calm wind. Chance of precipitation is 20%.
Friday Night
A chance of showers, mainly between 8pm and 2am. Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 62. Calm wind. Chance of precipitation is 30%.
Saturday
A chance of showers before 11am, then a chance of showers and thunderstorms between 11am and 2pm, then showers likely and possibly a thunderstorm after 2pm. Patchy fog before 8am. Otherwise, mostly cloudy, with a high near 76. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday Night
Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am. Mostly cloudy, with a low around 62. Chance of precipitation is 60%.
Sunday
A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 76. Chance of precipitation is 30%.
Sunday Night
A chance of showers and thunderstorms before 8pm. Mostly clear, with a low around 58. Chance of precipitation is 30%.
Monday
Sunny, with a high near 75.
Monday Night
Mostly clear, with a low around 57.
Tuesday
Mostly sunny, with a high near 76.
Tuesday Night
Partly cloudy, with a low around 59.
Wednesday
Partly sunny, with a high near 78.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NE Thompsontown PA
 40.6°N 77.19°W (Elev. 833 ft)
Last Update:
8:11 pm EDT Aug 19, 2026
Forecast Valid:
10pm EDT Aug 19, 2026-6pm EDT Aug 26, 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