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

73°F

23°C

Humidity 84%
Wind Speed Vrbl 3 mph
Barometer 29.91 in (1012.4 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Last update 4 Sep 2:53 am EDT
Extended Forecast for

Millersburg PA

  • Overnight

    Overnight: Mostly cloudy, with a low around 69. Calm wind.

    Low: 69 °F

    Mostly Cloudy

  • Friday

    Friday: A slight chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 84. Calm wind becoming north around 5 mph in the afternoon. Chance of precipitation is 20%.

    High: 84 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Friday Night

    Friday Night: A slight chance of showers and thunderstorms before 8pm, then a slight chance of showers between 8pm and 9pm. Mostly cloudy, with a low around 63. Calm wind. Chance of precipitation is 20%.

    Low: 63 °F

    Slight Chance
    T-storms then
    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 79. Calm wind becoming north around 5 mph in the afternoon.

    High: 79 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 56. Calm wind.

    Low: 56 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 77.

    High: 77 °F

    Sunny

  • Sunday Night

    Sunday Night: Areas of fog after 1am. Otherwise, mostly clear, with a low around 54.

    Low: 54 °F

    Mostly Clear
    then Areas
    Fog

  • Labor Day

    Labor Day: Areas of fog before 9am. Otherwise, mostly sunny, with a high near 77.

    High: 77 °F

    Areas Fog
    then Mostly
    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 56.

    Low: 56 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 69. Calm wind.
Friday
A slight chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 84. Calm wind becoming north around 5 mph in the afternoon. Chance of precipitation is 20%.
Friday Night
A slight chance of showers and thunderstorms before 8pm, then a slight chance of showers between 8pm and 9pm. Mostly cloudy, with a low around 63. Calm wind. Chance of precipitation is 20%.
Saturday
Mostly sunny, with a high near 79. Calm wind becoming north around 5 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 56. Calm wind.
Sunday
Sunny, with a high near 77.
Sunday Night
Areas of fog after 1am. Otherwise, mostly clear, with a low around 54.
Labor Day
Areas of fog before 9am. Otherwise, mostly sunny, with a high near 77.
Monday Night
Partly cloudy, with a low around 56.
Tuesday
Mostly sunny, with a high near 80.
Tuesday Night
Partly cloudy, with a low around 59.
Wednesday
A chance of showers. Partly sunny, with a high near 78. Chance of precipitation is 30%.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 65. Chance of precipitation is 30%.
Thursday
Partly sunny, with a high near 83.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Millersburg PA
 40.55°N 76.94°W (Elev. 525 ft)
Last Update:
2:21 am EDT Sep 4, 2026
Forecast Valid:
3am EDT Sep 4, 2026-6pm EDT Sep 10, 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