Current conditions at

Selinsgrove Penn Valley Airport (KSEG)

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

Fog/Mist

40°F

4°C

Humidity 93%
Wind Speed Calm
Barometer 30.07 in (1018.7 mb)
Dewpoint 38°F (3°C)
Visibility 2.00 mi
Last update 21 Nov 7:53 am EST
Detailed forecast for

Northumberland County

Today
Patchy fog this morning. Cloudy. Not as cool with highs in the lower 50s. Southwest winds around 5 mph.
Tonight
Cloudy. A slight chance of rain in the evening, then rain likely after midnight. Lows in the upper 30s. Light and variable winds, becoming northwest around 5 mph after midnight. Chance of rain 60 percent.
Saturday
Mostly cloudy in the morning, then becoming mostly sunny. Highs in the upper 40s. North winds 5 to 10 mph.
Saturday Night
Mostly clear in the evening, then becoming partly cloudy. Cooler with lows in the upper 20s. Northwest winds around 5 mph.
Sunday
Mostly sunny. Highs around 50. West winds around 5 mph.
Sunday Night
Mostly clear. Lows in the lower 30s.
Monday
Mostly sunny. Highs in the lower 50s.
Monday Night
Mostly cloudy. Lows in the mid 30s.
Tuesday
Cloudy. A chance of rain showers in the afternoon. Highs around 50. Chance of rain 50 percent.
Tuesday Night
Showers likely in the evening. Lows in the lower 40s. Chance of rain 60 percent.
Wednesday
Mostly cloudy in the morning, then partly sunny with a chance of showers in the afternoon. Highs in the upper 50s. Chance of rain 30 percent.
Wednesday Night
Mostly cloudy. A chance of showers in the evening. Lows in the upper 30s. Chance of rain 30 percent.
Thanksgiving Day
Partly sunny. Cooler with highs in the upper 40s.



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730 AM EST Fri Nov 21 2025
 
 

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database