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

59°F

15°C

Humidity 96%
Wind Speed Calm
Barometer 29.95 in (1013.8 mb)
Dewpoint 58°F (14°C)
Visibility 3.00 mi
Last update 19 Aug 4:53 am EDT
Extended Forecast for

4 Miles NNE Thompsontown PA

  • Today

    Today: Areas of fog between 7am and 9am. Otherwise, increasing clouds, with a high near 83. Calm wind becoming west around 5 mph in the afternoon.

    High: 83 °F

    Areas Fog
    then Mostly
    Sunny

  • Tonight

    Tonight: Patchy fog before 3am, then patchy fog after 4am. Otherwise, partly cloudy, with a low around 63. Calm wind.

    Low: 63 °F

    Partly Cloudy
    then Patchy
    Fog

  • Thursday

    Thursday: Showers likely, mainly between noon and 1pm. Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 77. Calm wind. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.

    High: 77 °F

    Showers
    Likely and
    Patchy Fog

  • Thursday Night

    Thursday Night: Patchy fog before 4am, then patchy fog after 5am. Otherwise, mostly cloudy, then gradually becoming mostly clear, with a low around 58. Calm wind.

    Low: 58 °F

    Patchy Fog

  • Friday

    Friday: Patchy fog before 9am. Otherwise, sunny, with a high near 80. Calm wind.

    High: 80 °F

    Patchy Fog
    then Sunny

  • Friday Night

    Friday Night: A slight chance of showers after 2am. Patchy fog after 4am. Otherwise, partly cloudy, with a low around 61. Chance of precipitation is 20%.

    Low: 61 °F

    Partly Cloudy
    then Slight
    Chance
    Showers and
    Patchy Fog

  • Saturday

    Saturday: A chance of showers after 8am. Patchy fog before 8am. Otherwise, partly sunny, with a high near 79. Chance of precipitation is 50%.

    High: 79 °F

    Chance
    Showers and
    Patchy Fog

  • Saturday Night

    Saturday Night: A chance of showers before 2am. Mostly cloudy, with a low around 62. Chance of precipitation is 50%.

    Low: 62 °F

    Chance
    Showers

  • Sunday

    Sunday: Partly sunny, with a high near 79.

    High: 79 °F

    Partly Sunny

Detailed Forecast

Today
Areas of fog between 7am and 9am. Otherwise, increasing clouds, with a high near 83. Calm wind becoming west around 5 mph in the afternoon.
Tonight
Patchy fog before 3am, then patchy fog after 4am. Otherwise, partly cloudy, with a low around 63. Calm wind.
Thursday
Showers likely, mainly between noon and 1pm. Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 77. Calm wind. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.
Thursday Night
Patchy fog before 4am, then patchy fog after 5am. Otherwise, mostly cloudy, then gradually becoming mostly clear, with a low around 58. Calm wind.
Friday
Patchy fog before 9am. Otherwise, sunny, with a high near 80. Calm wind.
Friday Night
A slight chance of showers after 2am. Patchy fog after 4am. Otherwise, partly cloudy, with a low around 61. Chance of precipitation is 20%.
Saturday
A chance of showers after 8am. Patchy fog before 8am. Otherwise, partly sunny, with a high near 79. Chance of precipitation is 50%.
Saturday Night
A chance of showers before 2am. Mostly cloudy, with a low around 62. Chance of precipitation is 50%.
Sunday
Partly sunny, with a high near 79.
Sunday Night
Partly cloudy, with a low around 58.
Monday
Sunny, with a high near 78.
Monday Night
Partly cloudy, with a low around 58.
Tuesday
Mostly sunny, with a high near 80.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles NNE Thompsontown PA
 40.62°N 77.19°W (Elev. 715 ft)
Last Update:
2:21 am EDT Aug 19, 2026
Forecast Valid:
5am EDT Aug 19, 2026-6pm EDT Aug 25, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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