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

54°F

12°C

Humidity 100%
Wind Speed Calm
Barometer 29.87 in (1011.5 mb)
Dewpoint 54°F (12°C)
Visibility 0.15 mi
Last update 6 Nov 1:53 am EST
Extended Forecast for

Mechanicsville PA

  • Overnight

    Overnight: Patchy fog before 3am, then patchy fog after 4am. Otherwise, mostly cloudy, with a low around 52. Calm wind.

    Low: 52 °F

    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 5 to 9 mph after midnight.

    Low: 44 °F

    Mostly Cloudy

  • Saturday

    Saturday: Isolated showers before 3pm, then isolated showers after 5pm. Mostly cloudy, with a high near 54. West wind 7 to 9 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

    High: 54 °F

    Isolated
    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: Partly cloudy, with a low around 42.

    Low: 42 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 59.

    High: 59 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 37.

    Low: 37 °F

    Mostly Clear

Detailed Forecast

Overnight
Patchy fog before 3am, then patchy fog after 4am. Otherwise, mostly cloudy, with a low around 52. Calm wind.
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 5 to 9 mph after midnight.
Saturday
Isolated showers before 3pm, then isolated showers after 5pm. Mostly cloudy, with a high near 54. West wind 7 to 9 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
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
Partly cloudy, with a low around 42.
Monday
Mostly sunny, with a high near 59.
Monday Night
Mostly clear, with a low around 37.
Tuesday
Mostly sunny, with a high near 64.
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 34.
Thursday
Partly sunny, with a high near 53.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mechanicsville PA
 40.98°N 76.6°W (Elev. 968 ft)
Last Update:
1:56 am EST Nov 6, 2026
Forecast Valid:
2am EST Nov 6, 2026-6pm EST Nov 12, 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