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When does the first frost occur in Central PA? See when the first 36 degree temperatures typically occur.
A 5th tornado has been determined to have occurred in Central PA (Burnside Twp in northern Centre County) on July 18th, 2026. See details.
See information on the Cyclone (PA) Tornado of Sept 9th, 2026
See information on 3 Tornadoes that occurred on September 1st, 2026

Current conditions at

Selinsgrove Penn Valley Airport (KSEG)

Lat: 40.82°NLon: 76.87°WElev: 443ft.

Fair

67°F

19°C

Humidity	63%
Wind Speed	S 5 mph
Barometer	30.18 in (1021.8 mb)
Dewpoint	54°F (12°C)
Visibility	10.00 mi
Last update	19 Sep 11:53 am EDT

More Information:

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

Extended Forecast for

Sunbury PA

This Afternoon
High: 73 °F
Partly Sunny
Tonight
Low: 59 °F
Chance
Showers
Sunday
High: 72 °F
Showers
Sunday Night
Low: 53 °F
Slight Chance
T-storms then
Slight Chance
Showers
Monday
High: 68 °F
Mostly Cloudy
Monday Night
Low: 49 °F
Chance
Showers
Tuesday
High: 62 °F
Chance
Showers
Tuesday Night
Low: 47 °F
Chance
Showers
Wednesday
High: 62 °F
Chance
Showers

Detailed Forecast

This Afternoon

Partly sunny, with a high near 73. Calm wind.

Tonight

A chance of showers, mainly after 1am. Mostly cloudy, with a low around 59. Calm wind becoming southeast 5 to 7 mph after midnight. Winds could gust as high as 22 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.

Sunday

Showers, with thunderstorms also possible after 5pm. High near 72. South wind 5 to 8 mph, with gusts as high as 23 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

Sunday Night

A slight chance of showers and thunderstorms before 8pm, then a slight chance of showers between 8pm and 2am. Mostly cloudy, with a low around 53. North wind around 7 mph, with gusts as high as 21 mph. Chance of precipitation is 20%.

Monday

Mostly cloudy, with a high near 68. Northeast wind around 6 mph.

Monday Night

A chance of showers, mainly after 2am. Mostly cloudy, with a low around 49. Chance of precipitation is 40%. New precipitation amounts between a tenth and quarter of an inch possible.

Tuesday

A chance of showers. Mostly cloudy, with a high near 62. Chance of precipitation is 50%.

Tuesday Night

A chance of showers. Mostly cloudy, with a low around 47. Chance of precipitation is 40%.

Wednesday

A chance of showers. Mostly cloudy, with a high near 62. Chance of precipitation is 30%.

Wednesday Night

A chance of showers. Mostly cloudy, with a low around 47. Chance of precipitation is 40%.

Thursday

A chance of showers. Mostly cloudy, with a high near 63. Chance of precipitation is 40%.

Thursday Night

A chance of showers. Mostly cloudy, with a low around 47. Chance of precipitation is 30%.