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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

Hazardous Weather Conditions

Hazardous Weather Outlook

Current conditions at

Somerset County Airport (K2G9)

Lat: 40.04°NLon: 79.02°WElev: 2275ft.

Light Rain

54°F

12°C

Humidity	100%
Wind Speed	E 7 mph
Barometer	30.12 in
Dewpoint	54°F (12°C)
Visibility	10.00 mi
Wind Chill	52°F (11°C)
Last update	21 Sep 10:55 pm EDT

More Information:

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

Extended Forecast for

Addison PA

Tonight
Low: 54 °F
Showers
Tuesday
High: 60 °F
Showers
Tuesday Night
Low: 50 °F
Showers
Wednesday
High: 57 °F
Showers
Wednesday Night
Low: 48 °F
Chance
Showers
Thursday
High: 59 °F
Partly Sunny
Thursday Night
Low: 44 °F
Partly Cloudy
Friday
High: 63 °F
Sunny
Friday Night
Low: 44 °F
Mostly Clear

Detailed Forecast

Tonight

Showers and possibly a thunderstorm. Low around 54. East wind around 7 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

Tuesday

Showers and possibly a thunderstorm before noon, then showers likely between noon and 2pm, then showers likely and possibly a thunderstorm after 2pm. High near 60. East wind 7 to 10 mph, with gusts as high as 22 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

Tuesday Night

Showers and possibly a thunderstorm before 4am, then showers likely. Low around 50. East wind around 11 mph, with gusts as high as 26 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Wednesday

Showers. High near 57. East wind 10 to 13 mph, with gusts as high as 24 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

Wednesday Night

A chance of showers, mainly before 2am. Mostly cloudy, with a low around 48. East wind around 11 mph, with gusts as high as 24 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.

Thursday

Partly sunny, with a high near 59.

Thursday Night

Partly cloudy, with a low around 44.

Friday

Sunny, with a high near 63.

Friday Night

Mostly clear, with a low around 44.

Saturday

Sunny, with a high near 63.

Saturday Night

Mostly clear, with a low around 45.