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.

A Few Clouds

75°F

24°C

Humidity 50%
Wind Speed NW 10 G 22 mph
Barometer 29.92 in (1012.8 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 21 Jun 10:53 am EDT
Extended Forecast for

Sunbury PA

  • Today

    Today: Partly sunny, with a high near 81. Northwest wind around 6 mph.

    High: 81 °F

    Partly Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 60. Calm wind.

    Low: 60 °F

    Increasing
    Clouds

  • Monday

    Monday: Rain likely, then periods of rain and possibly a thunderstorm after 11am. Some of the storms could produce heavy rainfall. High near 76. Calm wind becoming southeast around 5 mph in the afternoon. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 76 °F

    Heavy Rain

  • Monday Night

    Monday Night: Showers and possibly a thunderstorm. Patchy fog between midnight and 1am. Low around 62. Calm wind becoming north around 5 mph after midnight. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 62 °F

    Showers and
    Patchy Fog

  • Tuesday

    Tuesday: A chance of showers before 8am. Partly sunny, with a high near 80. North wind around 8 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    High: 80 °F

    Chance
    Showers then
    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 56.

    Low: 56 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 82.

    High: 82 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 59.

    Low: 59 °F

    Mostly Clear

  • Thursday

    Thursday: A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 83. Chance of precipitation is 50%.

    High: 83 °F

    Mostly Sunny
    then Chance
    T-storms

Detailed Forecast

Today
Partly sunny, with a high near 81. Northwest wind around 6 mph.
Tonight
Increasing clouds, with a low around 60. Calm wind.
Monday
Rain likely, then periods of rain and possibly a thunderstorm after 11am. Some of the storms could produce heavy rainfall. High near 76. Calm wind becoming southeast around 5 mph in the afternoon. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Monday Night
Showers and possibly a thunderstorm. Patchy fog between midnight and 1am. Low around 62. Calm wind becoming north around 5 mph after midnight. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Tuesday
A chance of showers before 8am. Partly sunny, with a high near 80. North wind around 8 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday Night
Mostly clear, with a low around 56.
Wednesday
Sunny, with a high near 82.
Wednesday Night
Mostly clear, with a low around 59.
Thursday
A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 83. Chance of precipitation is 50%.
Thursday Night
A chance of showers and thunderstorms before 8pm, then showers likely and possibly a thunderstorm between 8pm and 2am, then a chance of showers after 2am. Mostly cloudy, with a low around 61. Chance of precipitation is 70%.
Friday
A chance of showers and thunderstorms. Partly sunny, with a high near 83. Chance of precipitation is 50%.
Friday Night
A chance of thunderstorms. Partly cloudy, with a low around 61. Chance of precipitation is 30%.
Saturday
Mostly sunny, with a high near 84.
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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:
9:36 am EDT Jun 21, 2026
Forecast Valid:
11am EDT Jun 21, 2026-6pm EDT Jun 27, 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