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.

Overcast

65°F

18°C

Humidity 97%
Wind Speed Calm
Barometer 29.99 in (1015.3 mb)
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Last update 28 Aug 5:53 am EDT
Extended Forecast for

Sunbury PA

  • Today

    Today: Patchy dense fog between 7am and 8am. Otherwise, partly sunny, with a high near 82. Calm wind becoming north around 6 mph in the afternoon.

    High: 82 °F

    Patchy Dense
    Fog then
    Mostly Sunny

  • Tonight

    Tonight: Patchy fog after 5am. Otherwise, mostly clear, with a low around 52. Calm wind.

    Low: 52 °F

    Mostly Clear
    then Patchy
    Fog

  • Saturday

    Saturday: Areas of fog before 8am. Otherwise, sunny, with a high near 80. Calm wind.

    High: 80 °F

    Areas Fog
    then Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 58. Calm wind.

    Low: 58 °F

    Partly Cloudy

  • Sunday

    Sunday: Patchy fog before 7am. Otherwise, partly sunny, with a high near 84. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 84 °F

    Patchy Fog
    then Partly
    Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 65.

    Low: 65 °F

    Mostly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 85.

    High: 85 °F

    Partly Sunny

  • Monday Night

    Monday Night: A chance of showers after 2am. Mostly cloudy, with a low around 68. Chance of precipitation is 30%.

    Low: 68 °F

    Mostly Cloudy
    then Chance
    Showers

  • Tuesday

    Tuesday: A chance of showers before 8am, then a chance of showers after 2pm. Partly sunny, with a high near 87. Chance of precipitation is 30%.

    High: 87 °F

    Chance
    Showers

Detailed Forecast

Today
Patchy dense fog between 7am and 8am. Otherwise, partly sunny, with a high near 82. Calm wind becoming north around 6 mph in the afternoon.
Tonight
Patchy fog after 5am. Otherwise, mostly clear, with a low around 52. Calm wind.
Saturday
Areas of fog before 8am. Otherwise, sunny, with a high near 80. Calm wind.
Saturday Night
Partly cloudy, with a low around 58. Calm wind.
Sunday
Patchy fog before 7am. Otherwise, partly sunny, with a high near 84. Calm wind becoming southwest around 5 mph in the afternoon.
Sunday Night
Mostly cloudy, with a low around 65.
Monday
Partly sunny, with a high near 85.
Monday Night
A chance of showers after 2am. Mostly cloudy, with a low around 68. Chance of precipitation is 30%.
Tuesday
A chance of showers before 8am, then a chance of showers after 2pm. Partly sunny, with a high near 87. Chance of precipitation is 30%.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 69. Chance of precipitation is 50%.
Wednesday
A chance of showers and thunderstorms. Partly sunny, with a high near 85. Chance of precipitation is 50%.
Wednesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 67. Chance of precipitation is 30%.
Thursday
Partly sunny, with a high near 84.
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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:
5:48 am EDT Aug 28, 2026
Forecast Valid:
5am EDT Aug 28, 2026-6pm EDT Sep 3, 2026
 
Forecast Discussion
 
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Additional Resources

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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