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

78°F

26°C

Humidity 67%
Wind Speed NW 6 mph
Barometer 29.91 in (1012.7 mb)
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 14 Oct 3:53 pm EDT
Extended Forecast for

Sunbury PA

  • This Afternoon

    This Afternoon: A slight chance of showers before 5pm. Mostly cloudy, with a high near 80. West wind around 6 mph. Chance of precipitation is 20%.

    High: 80 °F

    Slight Chance
    Showers

  • Tonight

    Tonight: Mostly cloudy, with a low around 51. North wind around 5 mph.

    Low: 51 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 65. Calm wind.

    High: 65 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Showers, mainly after 1am. Low around 56. Calm wind becoming south 5 to 8 mph after midnight. Winds could gust as high as 23 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 56 °F

    Chance
    Showers then
    Showers

  • Friday

    Friday: Showers, with thunderstorms also possible after 2pm. High near 78. South wind around 9 mph, with gusts as high as 24 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 78 °F

    Showers

  • Friday Night

    Friday Night: Showers and possibly a thunderstorm before 8pm, then a slight chance of showers between 8pm and 2am. Low around 42. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 42 °F

    Showers 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, 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

Detailed Forecast

This Afternoon
A slight chance of showers before 5pm. Mostly cloudy, with a high near 80. West wind around 6 mph. Chance of precipitation is 20%.
Tonight
Mostly cloudy, with a low around 51. North wind around 5 mph.
Thursday
Mostly sunny, with a high near 65. Calm wind.
Thursday Night
Showers, mainly after 1am. Low around 56. Calm wind becoming south 5 to 8 mph after midnight. Winds could gust as high as 23 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday
Showers, with thunderstorms also possible after 2pm. High near 78. South wind around 9 mph, with gusts as high as 24 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday Night
Showers and possibly a thunderstorm before 8pm, then a slight chance of showers between 8pm and 2am. Low around 42. Chance of precipitation is 80%. 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, clear, with a low around 33.
Sunday
Widespread frost before 9am. Otherwise, sunny, with a high near 58.
Sunday Night
Mostly clear, with a low around 35.
Monday
Patchy frost. 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:
Sunbury PA
 40.87°N 76.79°W (Elev. 482 ft)
Last Update:
2:21 pm EDT Oct 14, 2026
Forecast Valid:
4pm EDT Oct 14, 2026-6pm EDT Oct 21, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation