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.

Partly Cloudy

71°F

22°C

Humidity 55%
Wind Speed Calm
Barometer 30.05 in (1017.5 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 26 Aug 12:53 pm EDT
Extended Forecast for

Mechanicsville PA

  • This Afternoon

    This Afternoon: A slight chance of showers between 2pm and 3pm. Partly sunny, with a high near 73. West wind around 6 mph. Chance of precipitation is 20%.

    High: 73 °F

    Slight Chance
    Showers

  • Tonight

    Tonight: Partly cloudy, with a low around 50. Northwest wind around 5 mph becoming calm in the evening.

    Low: 50 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 74. Calm wind becoming northwest around 6 mph in the morning.

    High: 74 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 50. Light southwest wind.

    Low: 50 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 77. Calm wind becoming southwest 5 to 7 mph in the afternoon.

    High: 77 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A chance of showers, mainly after 2am. Mostly cloudy, with a low around 56. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 56 °F

    Chance
    Showers

  • Friday

    Friday: A chance of showers before 8am. Partly sunny, with a high near 72. Chance of precipitation is 30%.

    High: 72 °F

    Chance
    Showers then
    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 48.

    Low: 48 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 73.

    High: 73 °F

    Sunny

Detailed Forecast

This Afternoon
A slight chance of showers between 2pm and 3pm. Partly sunny, with a high near 73. West wind around 6 mph. Chance of precipitation is 20%.
Tonight
Partly cloudy, with a low around 50. Northwest wind around 5 mph becoming calm in the evening.
Wednesday
Sunny, with a high near 74. Calm wind becoming northwest around 6 mph in the morning.
Wednesday Night
Partly cloudy, with a low around 50. Light southwest wind.
Thursday
Mostly sunny, with a high near 77. Calm wind becoming southwest 5 to 7 mph in the afternoon.
Thursday Night
A chance of showers, mainly after 2am. Mostly cloudy, with a low around 56. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.
Friday
A chance of showers before 8am. Partly sunny, with a high near 72. Chance of precipitation is 30%.
Friday Night
Partly cloudy, with a low around 48.
Saturday
Sunny, with a high near 73.
Saturday Night
Mostly clear, with a low around 49.
Sunday
Mostly sunny, with a high near 75.
Sunday Night
Partly cloudy, with a low around 53.
Labor Day
Mostly sunny, with a high near 76.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mechanicsville PA
 40.98°N 76.6°W (Elev. 968 ft)
Last Update:
7:09 am EDT Aug 26, 2025
Forecast Valid:
1pm EDT Aug 26, 2025-6pm EDT Sep 1, 2025
 
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