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.

Fair

79°F

26°C

Humidity 60%
Wind Speed S 13 G 21 mph
Barometer 29.85 in (1010.5 mb)
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Heat Index81°F (27°C)
Last update 13 Oct 3:53 pm EDT
Extended Forecast for

3 Miles N Mechanicsville PA

  • Tonight

    Tonight: Partly cloudy, with a low around 63. Southwest wind 5 to 7 mph.

    Low: 63 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A slight chance of showers. Partly sunny, with a high near 78. West wind 3 to 6 mph. Chance of precipitation is 20%.

    High: 78 °F

    Slight Chance
    Showers

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 51. North wind around 5 mph.

    Low: 51 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 68. Light and variable wind.

    High: 68 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Showers. Low around 57. Calm wind becoming south 5 to 9 mph after midnight. Winds could gust as high as 22 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 57 °F

    Showers
    Likely then
    Showers

  • Friday

    Friday: Showers. High near 72. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 72 °F

    Showers

  • Friday Night

    Friday Night: Showers likely before 8pm. Mostly cloudy, with a low around 39. Chance of precipitation is 60%.

    Low: 39 °F

    Showers
    Likely then
    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 50.

    High: 50 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Areas of frost after 2am. Otherwise, mostly clear, with a low around 32.

    Low: 32 °F

    Mostly Clear
    then Areas
    Frost

Detailed Forecast

Tonight
Partly cloudy, with a low around 63. Southwest wind 5 to 7 mph.
Wednesday
A slight chance of showers. Partly sunny, with a high near 78. West wind 3 to 6 mph. Chance of precipitation is 20%.
Wednesday Night
Mostly cloudy, with a low around 51. North wind around 5 mph.
Thursday
Mostly sunny, with a high near 68. Light and variable wind.
Thursday Night
Showers. Low around 57. Calm wind becoming south 5 to 9 mph after midnight. Winds could gust as high as 22 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Friday
Showers. High near 72. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday Night
Showers likely before 8pm. Mostly cloudy, with a low around 39. Chance of precipitation is 60%.
Saturday
Mostly sunny, with a high near 50.
Saturday Night
Areas of frost after 2am. Otherwise, mostly clear, with a low around 32.
Sunday
Widespread frost before 9am. Otherwise, sunny, with a high near 59.
Sunday Night
Mostly clear, with a low around 38.
Monday
Patchy frost. Otherwise, mostly sunny, with a high near 63.
Monday Night
Mostly cloudy, with a low around 43.
Tuesday
Mostly sunny, with a high near 65.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles N Mechanicsville PA
 41°N 76.59°W (Elev. 600 ft)
Last Update:
2:21 pm EDT Oct 13, 2026
Forecast Valid:
4pm EDT Oct 13, 2026-6pm EDT Oct 20, 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