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

63°F

17°C

Humidity 97%
Wind Speed Calm
Barometer 29.99 in (1015.3 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Last update 27 Aug 1:53 am EDT
Extended Forecast for

Millersburg PA

  • Overnight

    Overnight: A slight chance of showers. Mostly cloudy, with a low around 66. Light southeast wind. Chance of precipitation is 20%.

    Low: 66 °F

    Slight Chance
    Showers

  • Thursday

    Thursday: A slight chance of showers, then a chance of showers and thunderstorms after 2pm. Some of the storms could be severe. Mostly sunny, with a high near 86. Calm wind becoming south around 5 mph in the afternoon. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 86 °F

    Mostly Sunny
    then Severe
    Thunderstorms

  • Thursday Night

    Thursday Night: Showers and thunderstorms likely before 11pm, then a slight chance of showers between 11pm and 1am. Some of the storms could be severe. Areas of fog after 10pm. Otherwise, mostly cloudy, with a low around 63. Calm wind. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 63 °F

    Severe
    Thunderstorms
    and Areas Fog

  • Friday

    Friday: Areas of fog before 10am. Otherwise, mostly sunny, with a high near 83. Light north wind.

    High: 83 °F

    Areas Fog
    then Mostly
    Sunny

  • Friday Night

    Friday Night: Patchy fog after midnight. Otherwise, mostly clear, with a low around 59. Calm wind.

    Low: 59 °F

    Partly Cloudy
    then Patchy
    Fog

  • Saturday

    Saturday: Sunny, with a high near 82.

    High: 82 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 62.

    Low: 62 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 85.

    High: 85 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 64.

    Low: 64 °F

    Partly Cloudy

Detailed Forecast

Overnight
A slight chance of showers. Mostly cloudy, with a low around 66. Light southeast wind. Chance of precipitation is 20%.
Thursday
A slight chance of showers, then a chance of showers and thunderstorms after 2pm. Some of the storms could be severe. Mostly sunny, with a high near 86. Calm wind becoming south around 5 mph in the afternoon. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday Night
Showers and thunderstorms likely before 11pm, then a slight chance of showers between 11pm and 1am. Some of the storms could be severe. Areas of fog after 10pm. Otherwise, mostly cloudy, with a low around 63. Calm wind. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.
Friday
Areas of fog before 10am. Otherwise, mostly sunny, with a high near 83. Light north wind.
Friday Night
Patchy fog after midnight. Otherwise, mostly clear, with a low around 59. Calm wind.
Saturday
Sunny, with a high near 82.
Saturday Night
Mostly clear, with a low around 62.
Sunday
Mostly sunny, with a high near 85.
Sunday Night
Partly cloudy, with a low around 64.
Monday
Mostly sunny, with a high near 87.
Monday Night
Mostly cloudy, with a low around 67.
Tuesday
Partly sunny, with a high near 89.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 68. Chance of precipitation is 30%.
Wednesday
A chance of showers. Mostly sunny, with a high near 88. Chance of precipitation is 30%.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Millersburg PA
 40.55°N 76.97°W (Elev. 400 ft)
Last Update:
2:06 am EDT Aug 27, 2026
Forecast Valid:
2am EDT Aug 27, 2026-6pm EDT Sep 2, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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