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.

Mostly Cloudy

63°F

17°C

Humidity 100%
Wind Speed Calm
Barometer 29.84 in (1010.2 mb)
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Last update 5 Nov 8:53 pm EST
Extended Forecast for

Mechanicsville PA

  • Tonight

    Tonight: Scattered showers, mainly before 10pm. Patchy fog before 3am, then patchy fog after 4am. Otherwise, cloudy, then gradually becoming partly cloudy, with a low around 52. Light and variable wind. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 52 °F

    Scattered
    Showers then
    Patchy Fog

  • Friday

    Friday: Patchy fog before 10am. Otherwise, partly sunny, with a high near 67. Calm wind.

    High: 67 °F

    Patchy Fog
    then Mostly
    Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 44. Calm wind becoming west around 6 mph after midnight.

    Low: 44 °F

    Mostly Cloudy

  • Saturday

    Saturday: Scattered showers. Mostly cloudy, with a high near 54. West wind around 8 mph, with gusts as high as 20 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.

    High: 54 °F

    Scattered
    Showers

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 44. West wind 7 to 10 mph, with gusts as high as 22 mph.

    Low: 44 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 58.

    High: 58 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 40.

    Low: 40 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 60.

    High: 60 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 38.

    Low: 38 °F

    Mostly Clear

Detailed Forecast

Tonight
Scattered showers, mainly before 10pm. Patchy fog before 3am, then patchy fog after 4am. Otherwise, cloudy, then gradually becoming partly cloudy, with a low around 52. Light and variable wind. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.
Friday
Patchy fog before 10am. Otherwise, partly sunny, with a high near 67. Calm wind.
Friday Night
Mostly cloudy, with a low around 44. Calm wind becoming west around 6 mph after midnight.
Saturday
Scattered showers. Mostly cloudy, with a high near 54. West wind around 8 mph, with gusts as high as 20 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.
Saturday Night
Mostly cloudy, with a low around 44. West wind 7 to 10 mph, with gusts as high as 22 mph.
Sunday
Mostly sunny, with a high near 58.
Sunday Night
Mostly clear, with a low around 40.
Monday
Mostly sunny, with a high near 60.
Monday Night
Mostly clear, with a low around 38.
Tuesday
Mostly sunny, with a high near 63.
Tuesday Night
Mostly clear, with a low around 37.
Veterans Day
Mostly sunny, with a high near 58.
Wednesday Night
Partly cloudy, with a low around 33.
Thursday
Mostly sunny, with a high near 55.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mechanicsville PA
 40.98°N 76.6°W (Elev. 968 ft)
Last Update:
9:21 pm EST Nov 5, 2026
Forecast Valid:
9pm EST Nov 5, 2026-6pm EST Nov 12, 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