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.

Mostly Cloudy

83°F

28°C

Humidity 74%
Wind Speed S 7 G 17 mph
Barometer 30.10 in (1019.0 mb)
Dewpoint 74°F (23°C)
Visibility 10.00 mi
Heat Index90°F (32°C)
Last update 16 Aug 12:53 pm EDT
Extended Forecast for

Millersburg PA

  • This Afternoon

    This Afternoon: A chance of showers and thunderstorms, mainly between 1pm and 5pm. Partly sunny, with a high near 88. Light south wind. Chance of precipitation is 30%.

    High: 88 °F

    Chance
    T-storms

  • Tonight

    Tonight: Patchy fog after 2am. Otherwise, mostly clear, with a low around 68. Calm wind.

    Low: 68 °F

    Mostly Clear
    then Patchy
    Fog

  • Sunday

    Sunday: A chance of showers and thunderstorms, mainly after 4pm. Patchy fog before 8am. Otherwise, mostly sunny and hot, with a high near 93. Calm wind becoming west around 5 mph in the afternoon. Chance of precipitation is 30%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 93 °F

    Patchy Fog
    then Chance
    T-storms

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and 2am. Partly cloudy, with a low around 66. North wind 3 to 6 mph. Chance of precipitation is 30%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 66 °F

    Chance
    T-storms then
    Slight Chance
    Showers

  • Monday

    Monday: Partly sunny, with a high near 80. North wind around 6 mph.

    High: 80 °F

    Partly Sunny

  • Monday Night

    Monday Night: A slight chance of showers. Mostly cloudy, with a low around 63. Chance of precipitation is 20%.

    Low: 63 °F

    Slight Chance
    Showers

  • Tuesday

    Tuesday: A chance of showers after 2pm. Mostly cloudy, with a high near 79. Chance of precipitation is 30%.

    High: 79 °F

    Mostly Cloudy
    then Chance
    Showers

  • Tuesday Night

    Tuesday Night: A chance of showers. Mostly cloudy, with a low around 65. Chance of precipitation is 50%.

    Low: 65 °F

    Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 79. Chance of precipitation is 60%.

    High: 79 °F

    Chance
    Showers then
    Showers
    Likely

Detailed Forecast

This Afternoon
A chance of showers and thunderstorms, mainly between 1pm and 5pm. Partly sunny, with a high near 88. Light south wind. Chance of precipitation is 30%.
Tonight
Patchy fog after 2am. Otherwise, mostly clear, with a low around 68. Calm wind.
Sunday
A chance of showers and thunderstorms, mainly after 4pm. Patchy fog before 8am. Otherwise, mostly sunny and hot, with a high near 93. Calm wind becoming west around 5 mph in the afternoon. Chance of precipitation is 30%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday Night
A chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and 2am. Partly cloudy, with a low around 66. North wind 3 to 6 mph. Chance of precipitation is 30%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Monday
Partly sunny, with a high near 80. North wind around 6 mph.
Monday Night
A slight chance of showers. Mostly cloudy, with a low around 63. Chance of precipitation is 20%.
Tuesday
A chance of showers after 2pm. Mostly cloudy, with a high near 79. Chance of precipitation is 30%.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 65. Chance of precipitation is 50%.
Wednesday
A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 79. Chance of precipitation is 60%.
Wednesday Night
Showers likely and possibly a thunderstorm before 8pm, then a chance of showers between 8pm and 2am. Mostly cloudy, with a low around 63. Chance of precipitation is 60%.
Thursday
Partly sunny, with a high near 79.
Thursday Night
Partly cloudy, with a low around 60.
Friday
Mostly sunny, with a high near 82.
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ABOUT THIS FORECAST

 
Point Forecast:
Millersburg PA
 40.55°N 76.94°W (Elev. 525 ft)
Last Update:
12:51 pm EDT Aug 16, 2025
Forecast Valid:
12pm EDT Aug 16, 2025-6pm EDT Aug 22, 2025
 
Forecast Discussion
 
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Additional Resources

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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