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.

Fog/Mist

56°F

13°C

Humidity 100%
Wind Speed Calm
Barometer 29.90 in (1012.5 mb)
Dewpoint 56°F (13°C)
Visibility 5.00 mi
Last update 14 Oct 6:53 am EDT
Extended Forecast for

Sunbury PA

  • Today

    Today: Scattered showers, mainly before 11am. Increasing clouds, with a high near 79. Calm wind becoming west around 6 mph in the afternoon. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    High: 79 °F

    Scattered
    Showers then
    Mostly Cloudy

  • Tonight

    Tonight: Mostly cloudy, with a low around 51. North wind around 6 mph.

    Low: 51 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 67. Light and variable wind.

    High: 67 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A chance of showers, then showers and possibly a thunderstorm after 2am. Low around 55. Calm wind becoming south 5 to 8 mph after midnight. Winds could gust as high as 24 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 55 °F

    Chance
    Showers then
    Showers

  • Friday

    Friday: Showers and possibly a thunderstorm. High near 75. South wind 9 to 11 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 75 °F

    Showers

  • Friday Night

    Friday Night: Showers, mainly before 8pm. Low around 39. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 39 °F

    Showers then
    Slight Chance
    Showers

  • Saturday

    Saturday: Sunny, with a high near 53.

    High: 53 °F

    Sunny

  • Saturday Night

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

    Low: 33 °F

    Clear then
    Frost

  • Sunday

    Sunday: Widespread frost before 9am. Otherwise, sunny, with a high near 61.

    High: 61 °F

    Frost then
    Sunny

Detailed Forecast

Today
Scattered showers, mainly before 11am. Increasing clouds, with a high near 79. Calm wind becoming west around 6 mph in the afternoon. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Tonight
Mostly cloudy, with a low around 51. North wind around 6 mph.
Thursday
Mostly sunny, with a high near 67. Light and variable wind.
Thursday Night
A chance of showers, then showers and possibly a thunderstorm after 2am. Low around 55. Calm wind becoming south 5 to 8 mph after midnight. Winds could gust as high as 24 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday
Showers and possibly a thunderstorm. High near 75. South wind 9 to 11 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday Night
Showers, mainly before 8pm. Low around 39. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
Sunny, with a high near 53.
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 61.
Sunday Night
Mostly clear, with a low around 35.
Monday
Patchy frost. Otherwise, mostly sunny, with a high near 64.
Monday Night
Partly cloudy, with a low around 41.
Tuesday
Partly sunny, with a high near 67.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Sunbury PA
 40.86°N 76.77°W (Elev. 499 ft)
Last Update:
7:09 am EDT Oct 14, 2026
Forecast Valid:
7am EDT Oct 14, 2026-6pm EDT Oct 20, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation