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.

A Few Clouds

67°F

19°C

Humidity 84%
Wind Speed Calm
Barometer 30.01 in (1016.1 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Last update 14 Oct 8:53 pm EDT
Extended Forecast for

Millerstown PA

  • Tonight

    Tonight: Mostly cloudy, with a low around 51. Light north wind.

    Low: 51 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 64. Light and variable wind.

    High: 64 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Showers. Low around 55. Calm wind becoming south around 6 mph after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 55 °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 5 to 8 mph, with gusts as high as 25 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. Northwest wind 9 to 11 mph, with gusts as high as 30 mph. 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 52.

    High: 52 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Widespread frost, mainly after 5am. Otherwise, mostly clear, with a low around 33.

    Low: 33 °F

    Mostly Clear
    then Frost

  • Sunday

    Sunday: Widespread frost before 9am. Otherwise, sunny, with a high near 58.

    High: 58 °F

    Frost then
    Sunny

  • Sunday Night

    Sunday Night: Patchy frost after 5am. Otherwise, mostly clear, with a low around 34.

    Low: 34 °F

    Mostly Clear
    then Patchy
    Frost

Detailed Forecast

Tonight
Mostly cloudy, with a low around 51. Light north wind.
Thursday
Mostly sunny, with a high near 64. Light and variable wind.
Thursday Night
Showers. Low around 55. Calm wind becoming south around 6 mph after midnight. Winds could gust as high as 21 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 5 to 8 mph, with gusts as high as 25 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. Northwest wind 9 to 11 mph, with gusts as high as 30 mph. 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 52.
Saturday Night
Widespread frost, mainly after 5am. Otherwise, mostly clear, with a low around 33.
Sunday
Widespread frost before 9am. Otherwise, sunny, with a high near 58.
Sunday Night
Patchy frost after 5am. Otherwise, mostly clear, with a low around 34.
Monday
Patchy frost before 9am. Otherwise, sunny, with a high near 63.
Monday Night
Partly cloudy, with a low around 39.
Tuesday
Mostly sunny, with a high near 65.
Tuesday Night
Partly cloudy, with a low around 41.
Wednesday
Sunny, with a high near 65.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Millerstown PA
 40.55°N 77.14°W (Elev. 489 ft)
Last Update:
8:06 pm EDT Oct 14, 2026
Forecast Valid:
9pm EDT Oct 14, 2026-6pm EDT Oct 21, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation