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

74°F

23°C

Humidity 74%
Wind Speed S 3 mph
Barometer 29.91 in (1012.5 mb)
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Last update 14 Oct 1:53 pm EDT
Extended Forecast for

Millersburg PA

  • This Afternoon

    This Afternoon: A chance of showers and thunderstorms, mainly between 4pm and 5pm. Mostly cloudy, with a high near 81. West wind around 6 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 81 °F

    Chance
    Showers

  • Tonight

    Tonight: Mostly cloudy, with a low around 52. North wind 3 to 5 mph.

    Low: 52 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 65. Light and variable wind.

    High: 65 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Showers, mainly after 10pm. Low around 56. Calm wind becoming south 5 to 7 mph in the evening. Winds could gust as high as 22 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 56 °F

    Chance
    Showers then
    Showers

  • Friday

    Friday: Showers likely before 8am, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 79. South wind 6 to 9 mph, with gusts as high as 24 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 79 °F

    Showers
    Likely

  • Friday Night

    Friday Night: Showers likely and possibly a thunderstorm before 8pm, then a slight chance of showers between 8pm and 2am. Mostly cloudy, with a low around 43. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 43 °F

    Showers
    Likely then
    Slight Chance
    Showers

  • Saturday

    Saturday: Mostly sunny, with a high near 53.

    High: 53 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Areas of frost after 1am. Otherwise, mostly clear, with a low around 34.

    Low: 34 °F

    Mostly Clear
    then Areas
    Frost

  • Sunday

    Sunday: Widespread frost, mainly before 8am. Otherwise, sunny, with a high near 59.

    High: 59 °F

    Frost then
    Sunny

Detailed Forecast

This Afternoon
A chance of showers and thunderstorms, mainly between 4pm and 5pm. Mostly cloudy, with a high near 81. West wind around 6 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
Mostly cloudy, with a low around 52. North wind 3 to 5 mph.
Thursday
Mostly sunny, with a high near 65. Light and variable wind.
Thursday Night
Showers, mainly after 10pm. Low around 56. Calm wind becoming south 5 to 7 mph in the evening. Winds could gust as high as 22 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Friday
Showers likely before 8am, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 79. South wind 6 to 9 mph, with gusts as high as 24 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday Night
Showers likely and possibly a thunderstorm before 8pm, then a slight chance of showers between 8pm and 2am. Mostly cloudy, with a low around 43. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday
Mostly sunny, with a high near 53.
Saturday Night
Areas of frost after 1am. Otherwise, mostly clear, with a low around 34.
Sunday
Widespread frost, mainly before 8am. Otherwise, sunny, with a high near 59.
Sunday Night
Mostly clear, with a low around 35.
Monday
Sunny, with a high near 63.
Monday Night
Partly cloudy, with a low around 40.
Tuesday
Mostly sunny, with a high near 65.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Millersburg PA
 40.55°N 76.97°W (Elev. 400 ft)
Last Update:
2:21 pm EDT Oct 14, 2026
Forecast Valid:
2pm EDT Oct 14, 2026-6pm EDT Oct 20, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation