Current conditions at

Selinsgrove Penn Valley Airport (KSEG)

Lat: 40.82° N Lon: 76.87° W Elev: 443 ft.

Overcast

63°F

17°C

Humidity 81%
Wind Speed Calm
Barometer 30.02 in (1016.4 mb)
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 25 Aug 2:53 am EDT
Detailed forecast for

Northumberland County

Rest Of Tonight
Mostly cloudy. Near steady temperature in the upper 50s. Southwest winds around 5 mph.
Tuesday
Partly sunny. Highs in the mid 70s. West winds around 5 mph.
Tuesday Night
Partly cloudy. Patchy fog after midnight. Lows in the mid 50s. Northwest winds around 5 mph in the evening, becoming light and variable.
Wednesday
Patchy fog in the morning. Mostly sunny. Highs in the upper 70s. Light and variable winds, becoming south around 5 mph in the afternoon.
Wednesday Night
Partly cloudy in the evening, then mostly cloudy with a chance of showers after midnight. Lows in the lower 60s. Southeast winds around 5 mph. Gusts up to 20 mph after midnight. Chance of rain 40 percent.
Thursday
Partly sunny in the morning, then mostly cloudy with showers likely with a chance of thunderstorms in the afternoon. Humid with highs in the lower 80s. Chance of rain 70 percent.
Thursday Night
A chance of thunderstorms in the evening. Showers likely. Humid with lows in the lower 60s. Chance of rain 70 percent.
Friday
Partly sunny. Humid with highs around 80.
Friday Night
Partly cloudy in the evening, then clearing. Lows in the upper 50s.
Saturday
Mostly sunny. Highs in the upper 70s.
Saturday Night
Mostly clear. Lows in the upper 50s.
Sunday
Mostly sunny. Highs in the lower 80s.
Sunday Night
Partly cloudy. Lows in the lower 60s.
Monday
Partly sunny. Humid with highs in the mid 80s.



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300 AM EDT Tue Aug 25 2026
 
 

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database