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.

Light Rain Fog/Mist

39°F

4°C

Humidity 93%
Wind Speed NW 3 mph
Barometer 30.00 in (1016.3 mb)
Dewpoint 37°F (3°C)
Visibility 4.00 mi
Last update 10 Jan 2:53 pm EST
Extended Forecast for

Mechanicsville PA

  • This Afternoon

    This Afternoon: Showers. High near 39. Light east wind. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 39 °F

    Showers

  • Tonight

    Tonight: Showers likely, mainly before 9pm. Patchy fog between 7pm and 1am. Otherwise, cloudy, then gradually becoming partly cloudy, with a low around 32. Calm wind becoming west 5 to 8 mph after midnight. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 32 °F

    Showers
    Likely and
    Patchy Fog

  • Sunday

    Sunday: A slight chance of snow showers before 2pm, then a slight chance of rain and snow showers between 2pm and 3pm, then a slight chance of snow showers after 3pm. Increasing clouds, with a high near 38. West wind 8 to 15 mph, with gusts as high as 32 mph. Chance of precipitation is 20%.

    High: 38 °F

    Sunny then
    Slight Chance
    Rain/Snow

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 27. West wind 13 to 17 mph, with gusts as high as 31 mph.

    Low: 27 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 38. Southwest wind around 10 mph, with gusts as high as 22 mph.

    High: 38 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 29.

    Low: 29 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 43.

    High: 43 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 37.

    Low: 37 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A chance of rain after 1pm. Mostly cloudy, with a high near 44. Chance of precipitation is 30%.

    High: 44 °F

    Mostly Cloudy
    then Chance
    Rain

Detailed Forecast

This Afternoon
Showers. High near 39. Light east wind. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Tonight
Showers likely, mainly before 9pm. Patchy fog between 7pm and 1am. Otherwise, cloudy, then gradually becoming partly cloudy, with a low around 32. Calm wind becoming west 5 to 8 mph after midnight. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Sunday
A slight chance of snow showers before 2pm, then a slight chance of rain and snow showers between 2pm and 3pm, then a slight chance of snow showers after 3pm. Increasing clouds, with a high near 38. West wind 8 to 15 mph, with gusts as high as 32 mph. Chance of precipitation is 20%.
Sunday Night
Mostly cloudy, with a low around 27. West wind 13 to 17 mph, with gusts as high as 31 mph.
Monday
Mostly sunny, with a high near 38. Southwest wind around 10 mph, with gusts as high as 22 mph.
Monday Night
Partly cloudy, with a low around 29.
Tuesday
Mostly sunny, with a high near 43.
Tuesday Night
Mostly cloudy, with a low around 37.
Wednesday
A chance of rain after 1pm. Mostly cloudy, with a high near 44. Chance of precipitation is 30%.
Wednesday Night
Mostly cloudy, with a low around 24.
Thursday
Partly sunny, with a high near 30.
Thursday Night
Partly cloudy, with a low around 17.
Friday
Partly sunny, with a high near 31.
Friday Night
Mostly cloudy, with a low around 21.
Saturday
Partly sunny, with a high near 34.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mechanicsville PA
 40.98°N 76.57°W (Elev. 961 ft)
Last Update:
1:06 pm EST Jan 10, 2026
Forecast Valid:
3pm EST Jan 10, 2026-6pm EST Jan 17, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation