Current conditions at

Selinsgrove Penn Valley Airport (KSEG)

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

Fair

58°F

14°C

Humidity 97%
Wind Speed Calm
Barometer 30.22 in (1023.1 mb)
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 7 Sep 9:53 pm EDT
Detailed forecast for

Northumberland County

Overnight
Partly cloudy late this evening, then clearing. Patchy fog. Lows in the lower 50s. Light and variable winds.
Tuesday
Patchy fog in the morning. Mostly sunny. Highs around 80. Light and variable winds.
Tuesday Night
Partly cloudy. Lows in the upper 50s. Light and variable winds.
Wednesday
Mostly sunny. Very warm with highs in the mid 80s. South winds 5 to 10 mph.
Wednesday Night
Partly cloudy in the evening, then mostly cloudy with a chance of showers after midnight. Lows in the upper 60s. Southwest winds 5 to 10 mph with gusts up to 20 mph. Chance of rain 50 percent.
Thursday
Partly sunny in the morning, then becoming mostly cloudy. A chance of showers. Humid with highs in the upper 70s. Chance of rain 50 percent.
Thursday Night
Mostly cloudy with a chance of showers in the evening, then partly cloudy after midnight. Cooler with lows in the upper 50s. Chance of rain 50 percent.
Friday
Sunny. Highs in the mid 70s.
Friday Night
Mostly clear. Lows in the mid 50s.
Saturday
Mostly sunny. Highs in the upper 70s.
Saturday Night
Partly cloudy in the evening, then mostly cloudy with a chance of showers after midnight. Lows in the lower 60s. Chance of rain 30 percent.
Sunday
Partly sunny. A chance of showers in the morning. Humid with highs around 80. Chance of rain 30 percent.
Sunday Night
Partly cloudy. Lows around 60.
Monday
Mostly sunny. Highs in the upper 70s.



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1030 PM EDT Mon Sep 7 2026
 
 

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database