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

33°F

1°C

Humidity 54%
Wind Speed SW 3 mph
Barometer 30.27 in (1025.5 mb)
Dewpoint 18°F (-8°C)
Visibility 10.00 mi
Last update 19 Mar 1:53 am EDT
Extended Forecast for

Mechanicsville PA

  • Overnight

    Overnight: Cloudy, with a low around 28. South wind around 6 mph.

    Low: 28 °F

    Cloudy

  • Thursday

    Thursday: Cloudy, with a high near 46. South wind around 6 mph.

    High: 46 °F

    Cloudy

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 29. Calm wind.

    Low: 29 °F

    Mostly Cloudy

  • Friday

    Friday: Showers, mainly after 5pm. High near 56. Calm wind becoming south 5 to 8 mph in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 56 °F

    Mostly Cloudy
    then Showers

  • Friday Night

    Friday Night: Showers, mainly before 11pm. Low around 42. South wind 6 to 8 mph becoming west after midnight. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 42 °F

    Showers then
    Chance
    Showers

  • Saturday

    Saturday: Mostly sunny, with a high near 56.

    High: 56 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 42.

    Low: 42 °F

    Mostly Cloudy

  • Sunday

    Sunday: A chance of showers after 2pm. Mostly cloudy, with a high near 61. Chance of precipitation is 30%.

    High: 61 °F

    Partly Sunny
    then Chance
    Showers

  • Sunday Night

    Sunday Night: A chance of showers before 2am. Mostly cloudy, with a low around 34. Chance of precipitation is 40%.

    Low: 34 °F

    Chance
    Showers

Detailed Forecast

Overnight
Cloudy, with a low around 28. South wind around 6 mph.
Thursday
Cloudy, with a high near 46. South wind around 6 mph.
Thursday Night
Mostly cloudy, with a low around 29. Calm wind.
Friday
Showers, mainly after 5pm. High near 56. Calm wind becoming south 5 to 8 mph in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday Night
Showers, mainly before 11pm. Low around 42. South wind 6 to 8 mph becoming west after midnight. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday
Mostly sunny, with a high near 56.
Saturday Night
Mostly cloudy, with a low around 42.
Sunday
A chance of showers after 2pm. Mostly cloudy, with a high near 61. Chance of precipitation is 30%.
Sunday Night
A chance of showers before 2am. Mostly cloudy, with a low around 34. Chance of precipitation is 40%.
Monday
Mostly sunny, with a high near 44.
Monday Night
Mostly clear, with a low around 25.
Tuesday
Partly sunny, with a high near 44.
Tuesday Night
Mostly cloudy, with a low around 29.
Wednesday
Partly sunny, with a high near 49.
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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:
2:05 am EDT Mar 19, 2026
Forecast Valid:
2am EDT Mar 19, 2026-6pm EDT Mar 25, 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