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

79°F

26°C

Humidity 60%
Wind Speed S 13 G 21 mph
Barometer 29.85 in (1010.5 mb)
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Heat Index81°F (27°C)
Last update 13 Oct 3:53 pm EDT
Extended Forecast for

Sunbury PA

  • Tonight

    Tonight: Mostly clear, with a low around 63. South wind 5 to 7 mph becoming calm in the evening.

    Low: 63 °F

    Mostly Clear

  • Wednesday

    Wednesday: A slight chance of showers. Partly sunny, with a high near 79. Calm wind becoming west around 6 mph in the afternoon. Chance of precipitation is 20%.

    High: 79 °F

    Slight Chance
    Showers

  • Wednesday Night

    Wednesday Night: 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 68. Light and variable wind.

    High: 68 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Showers. Low around 57. Calm wind becoming south 5 to 9 mph after midnight. Winds could gust as high as 26 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 57 °F

    Showers
    Likely then
    Showers

  • Friday

    Friday: Showers. High near 73. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 73 °F

    Showers

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 39.

    Low: 39 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 51.

    High: 51 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Areas of frost after 1am. Otherwise, mostly clear, with a low around 33.

    Low: 33 °F

    Mostly Clear
    then Areas
    Frost

Detailed Forecast

Tonight
Mostly clear, with a low around 63. South wind 5 to 7 mph becoming calm in the evening.
Wednesday
A slight chance of showers. Partly sunny, with a high near 79. Calm wind becoming west around 6 mph in the afternoon. Chance of precipitation is 20%.
Wednesday Night
Mostly cloudy, with a low around 52. North wind 3 to 5 mph.
Thursday
Mostly sunny, with a high near 68. Light and variable wind.
Thursday Night
Showers. Low around 57. Calm wind becoming south 5 to 9 mph after midnight. Winds could gust as high as 26 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday
Showers. High near 73. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday Night
Mostly cloudy, with a low around 39.
Saturday
Mostly sunny, with a high near 51.
Saturday Night
Areas of frost after 1am. Otherwise, mostly clear, with a low around 33.
Sunday
Widespread frost, mainly before 8am. Otherwise, sunny, with a high near 60.
Sunday Night
Mostly clear, with a low around 37.
Monday
Patchy frost. Otherwise, mostly sunny, with a high near 63.
Monday Night
Mostly cloudy, with a low around 43.
Tuesday
Mostly sunny, with a high near 66.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Sunbury PA
 40.87°N 76.79°W (Elev. 482 ft)
Last Update:
2:21 pm EDT Oct 13, 2026
Forecast Valid:
4pm EDT Oct 13, 2026-6pm EDT Oct 20, 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