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.

Overcast

46°F

8°C

Humidity 50%
Wind Speed SE 15 G 25 mph
Barometer 30.17 in (1021.8 mb)
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Wind Chill40°F (4°C)
Last update 15 Mar 5:53 pm EDT
Extended Forecast for

Mechanicsville PA

  • Tonight

    Tonight: Showers, mainly after 1am. Low around 45. Southeast wind 10 to 13 mph, with gusts as high as 34 mph. Chance of precipitation is 100%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 45 °F

    Chance
    Showers then
    Showers

  • Monday

    Monday: Showers likely before 2pm, then a chance of showers and thunderstorms between 2pm and 4pm, then showers and possibly a thunderstorm after 4pm. Some of the storms could be severe and produce heavy rainfall. High near 68. South wind 10 to 14 mph, with gusts as high as 32 mph. Chance of precipitation is 80%. New rainfall amounts between three quarters and one inch possible.

    High: 68 °F

    Showers
    Likely then
    Severe
    Thunderstorms

  • Monday Night

    Monday Night: Rain showers before 11pm, then rain and snow showers between 11pm and 2am, then a slight chance of snow showers after 2am. The rain could be heavy at times. Some thunder is also possible. Low around 25. West wind around 10 mph, with gusts as high as 31 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.

    Low: 25 °F

    Rain/Snow

  • Tuesday

    Tuesday: Partly sunny, with a high near 33. West wind 10 to 13 mph, with gusts as high as 30 mph.

    High: 33 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 20. West wind 3 to 8 mph. Winds could gust as high as 23 mph.

    Low: 20 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 38.

    High: 38 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 26.

    Low: 26 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly cloudy, with a high near 45.

    High: 45 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 33.

    Low: 33 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Showers, mainly after 1am. Low around 45. Southeast wind 10 to 13 mph, with gusts as high as 34 mph. Chance of precipitation is 100%. New precipitation amounts of less than a tenth of an inch possible.
Monday
Showers likely before 2pm, then a chance of showers and thunderstorms between 2pm and 4pm, then showers and possibly a thunderstorm after 4pm. Some of the storms could be severe and produce heavy rainfall. High near 68. South wind 10 to 14 mph, with gusts as high as 32 mph. Chance of precipitation is 80%. New rainfall amounts between three quarters and one inch possible.
Monday Night
Rain showers before 11pm, then rain and snow showers between 11pm and 2am, then a slight chance of snow showers after 2am. The rain could be heavy at times. Some thunder is also possible. Low around 25. West wind around 10 mph, with gusts as high as 31 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.
Tuesday
Partly sunny, with a high near 33. West wind 10 to 13 mph, with gusts as high as 30 mph.
Tuesday Night
Partly cloudy, with a low around 20. West wind 3 to 8 mph. Winds could gust as high as 23 mph.
Wednesday
Partly sunny, with a high near 38.
Wednesday Night
Mostly cloudy, with a low around 26.
Thursday
Mostly cloudy, with a high near 45.
Thursday Night
Mostly cloudy, with a low around 33.
Friday
Mostly cloudy, with a high near 52.
Friday Night
A chance of showers. Mostly cloudy, with a low around 38. Chance of precipitation is 40%.
Saturday
A chance of showers. Mostly cloudy, with a high near 54. Chance of precipitation is 30%.
Saturday Night
Mostly cloudy, with a low around 34.
Sunday
Partly sunny, with a high near 50.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mechanicsville PA
 40.96°N 76.6°W (Elev. 499 ft)
Last Update:
3:06 pm EDT Mar 15, 2026
Forecast Valid:
6pm EDT Mar 15, 2026-6pm EDT Mar 22, 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