National Weather Service

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Pennsylvania Fire Weather Awareness Week | March 23-27, 2026

Current conditions at

Selinsgrove Penn Valley Airport (KSEG)

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

Mostly Cloudy

43°F

6°C

Humidity	65%
Wind Speed	N 14 G 23 mph
Barometer	30.13 in (1020.4 mb)
Dewpoint	32°F (0°C)
Visibility	10.00 mi
Wind Chill	36°F (2°C)
Last update	27 Mar 11:53 am EDT

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Detailed forecast for

Northumberland County

Today

Cloudy with a chance of rain this morning, then partly sunny this afternoon. Much cooler with highs in the mid 40s. North winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 50 percent.

Tonight

Mostly clear in the evening, then becoming partly cloudy. Much cooler with lows in the mid 20s. North winds 5 to 10 mph with gusts up to 20 mph.

Saturday

Mostly sunny. Highs in the lower 40s. Northwest winds 5 to 10 mph with gusts up to 25 mph.

Saturday Night

Mostly clear in the evening, then becoming mostly cloudy. Lows in the upper 20s. Northwest winds 5 to 10 mph with gusts up to 20 mph, becoming southwest after midnight.

Sunday

Partly sunny. Not as cool with highs in the lower 50s. South winds 5 to 10 mph with gusts up to 20 mph.

Sunday Night

Mostly cloudy in the evening, then becoming partly cloudy. Not as cool with lows in the upper 30s.

Monday

Partly sunny. Highs in the upper 50s.

Monday Night

Mostly cloudy with a 40 percent chance of rain. Unseasonably mild. Lows in the mid 40s.

Tuesday

Mostly cloudy with a 50 percent chance of rain. Warm with highs in the mid 60s.

Tuesday Night

Mostly cloudy with a 50 percent chance of rain. Unseasonably mild. Lows in the mid 50s.