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

44°F

7°C

Humidity 79%
Wind Speed NW 9 G 23 mph
Barometer 29.78 in (1008.4 mb)
Dewpoint 38°F (3°C)
Visibility 9.00 mi
Wind Chill39°F (4°C)
Last update 12 Mar 5:53 am EDT
Extended Forecast for

Mechanicsville PA

  • Today

    Today: A chance of rain showers before 10am, then a chance of snow showers between 10am and 1pm. Cloudy, then gradually becoming mostly sunny, with a temperature falling to around 37 by 9am. Northwest wind 13 to 18 mph, with gusts as high as 34 mph. Chance of precipitation is 50%. Little or no snow accumulation expected.

    High: 40 °F⇓

    Chance
    Rain/Snow
    then Slight
    Chance Snow
    Showers

  • Tonight

    Tonight: Mostly clear, with a low around 27. Northwest wind 8 to 13 mph becoming light west after midnight. Winds could gust as high as 23 mph.

    Low: 27 °F

    Mostly Clear

  • Friday

    Friday: A slight chance of snow showers before 11am, then a slight chance of rain and snow showers between 11am and 2pm, then a chance of rain showers after 2pm. Increasing clouds, with a high near 47. South wind 5 to 10 mph increasing to 12 to 17 mph in the afternoon. Winds could gust as high as 37 mph. Chance of precipitation is 30%.

    High: 47 °F

    Chance
    Rain/Snow

  • Friday Night

    Friday Night: A chance of showers, mainly before 8pm. Partly cloudy, with a low around 33. West wind 14 to 17 mph, with gusts as high as 32 mph. Chance of precipitation is 30%.

    Low: 33 °F

    Chance
    Showers

  • Saturday

    Saturday: Mostly sunny, with a high near 46. West wind around 11 mph, with gusts as high as 24 mph.

    High: 46 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A slight chance of snow showers after 2am. Mostly cloudy, with a low around 32. Chance of precipitation is 20%.

    Low: 32 °F

    Mostly Cloudy
    then Slight
    Chance Snow
    Showers

  • Sunday

    Sunday: Mostly cloudy, with a high near 50.

    High: 50 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: Showers likely, mainly after 2am. Cloudy, with a low around 46. Chance of precipitation is 70%.

    Low: 46 °F

    Chance
    Showers then
    Showers
    Likely

  • Monday

    Monday: Showers. High near 60. Chance of precipitation is 90%.

    High: 60 °F

    Showers

Detailed Forecast

Today
A chance of rain showers before 10am, then a chance of snow showers between 10am and 1pm. Cloudy, then gradually becoming mostly sunny, with a temperature falling to around 37 by 9am. Northwest wind 13 to 18 mph, with gusts as high as 34 mph. Chance of precipitation is 50%. Little or no snow accumulation expected.
Tonight
Mostly clear, with a low around 27. Northwest wind 8 to 13 mph becoming light west after midnight. Winds could gust as high as 23 mph.
Friday
A slight chance of snow showers before 11am, then a slight chance of rain and snow showers between 11am and 2pm, then a chance of rain showers after 2pm. Increasing clouds, with a high near 47. South wind 5 to 10 mph increasing to 12 to 17 mph in the afternoon. Winds could gust as high as 37 mph. Chance of precipitation is 30%.
Friday Night
A chance of showers, mainly before 8pm. Partly cloudy, with a low around 33. West wind 14 to 17 mph, with gusts as high as 32 mph. Chance of precipitation is 30%.
Saturday
Mostly sunny, with a high near 46. West wind around 11 mph, with gusts as high as 24 mph.
Saturday Night
A slight chance of snow showers after 2am. Mostly cloudy, with a low around 32. Chance of precipitation is 20%.
Sunday
Mostly cloudy, with a high near 50.
Sunday Night
Showers likely, mainly after 2am. Cloudy, with a low around 46. Chance of precipitation is 70%.
Monday
Showers. High near 60. Chance of precipitation is 90%.
Monday Night
A chance of rain and snow showers before 2am. Mostly cloudy, with a low around 25. Chance of precipitation is 40%.
Tuesday
Partly sunny, with a high near 33.
Tuesday Night
Mostly cloudy, with a low around 20.
Wednesday
Mostly sunny, with a high near 36.
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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:
3:06 am EDT Mar 12, 2026
Forecast Valid:
6am EDT Mar 12, 2026-6pm EDT Mar 18, 2026
 
Forecast Discussion
 
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Additional Resources

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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