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

60°F

16°C

Humidity 78%
Wind Speed Calm
Barometer 29.77 in (1007.9 mb)
Dewpoint 53°F (12°C)
Visibility 10.00 mi
Last update 19 Jun 5:53 am EDT
Extended Forecast for

Sunbury PA

  • Juneteenth

    Juneteenth: Mostly sunny, with a high near 80. Light west wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 22 mph.

    High: 80 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 58. West wind 5 to 7 mph, with gusts as high as 20 mph.

    Low: 58 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 80. West wind 7 to 10 mph, with gusts as high as 22 mph.

    High: 80 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 57. Northwest wind around 5 mph becoming calm in the evening.

    Low: 57 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 82. Calm wind becoming west around 5 mph in the afternoon.

    High: 82 °F

    Sunny

  • Sunday Night

    Sunday Night: Showers likely and possibly a thunderstorm after 2am. Mostly cloudy, with a low around 61. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 61 °F

    Partly Cloudy
    then Showers
    Likely

  • Monday

    Monday: Showers, with thunderstorms also possible after 2pm. High near 78. Chance of precipitation is 90%.

    High: 78 °F

    Showers

  • Monday Night

    Monday Night: A chance of showers and thunderstorms before 8pm, then a chance of showers between 8pm and 2am. Mostly cloudy, with a low around 60. Chance of precipitation is 50%.

    Low: 60 °F

    Chance
    T-storms then
    Chance
    Showers

  • Tuesday

    Tuesday: Mostly sunny, with a high near 80.

    High: 80 °F

    Mostly Sunny

Detailed Forecast

Juneteenth
Mostly sunny, with a high near 80. Light west wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 22 mph.
Tonight
Mostly clear, with a low around 58. West wind 5 to 7 mph, with gusts as high as 20 mph.
Saturday
Sunny, with a high near 80. West wind 7 to 10 mph, with gusts as high as 22 mph.
Saturday Night
Mostly clear, with a low around 57. Northwest wind around 5 mph becoming calm in the evening.
Sunday
Sunny, with a high near 82. Calm wind becoming west around 5 mph in the afternoon.
Sunday Night
Showers likely and possibly a thunderstorm after 2am. Mostly cloudy, with a low around 61. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Monday
Showers, with thunderstorms also possible after 2pm. High near 78. Chance of precipitation is 90%.
Monday Night
A chance of showers and thunderstorms before 8pm, then a chance of showers between 8pm and 2am. Mostly cloudy, with a low around 60. Chance of precipitation is 50%.
Tuesday
Mostly sunny, with a high near 80.
Tuesday Night
Mostly clear, with a low around 58.
Wednesday
Mostly sunny, with a high near 81.
Wednesday Night
A chance of showers. Partly cloudy, with a low around 60. Chance of precipitation is 30%.
Thursday
A chance of showers and thunderstorms. Partly sunny, with a high near 82. Chance of precipitation is 40%.
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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:
3:21 am EDT Jun 19, 2026
Forecast Valid:
6am EDT Jun 19, 2026-6pm EDT Jun 25, 2026
 
Forecast Discussion
 
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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