Weather in September 2025

Sonoma weather in September 2025

°C °F

The average weather in Sonoma in September

The temperatures in Sonoma in September are comfortable with low of 13°C and and high up to 28°C.

There is little to no rain in Sonoma during September, so it’s a lot easier to explore the city. Just remember to dress in warm layers, as it can still get pretty chilly.

Our weather forecast can give you a great sense of what weather to expect in Sonoma in September 2025.

If you’re planning to visit Sonoma in the near future, we highly recommend that you review the 14 day weather forecast for Sonoma before you arrive.

Temperatures
28° / 13°
Rainy Days
0
Snowy Days
0
Dry Days
30
Rainfall
4
mm
Sun Hours
11.2
Hrs

Explore the weather in Sonoma in other months

Sonoma annual weather

Month Temperatures Rainy Days Dry Days Snowy Days Rainfall Weather More details
January 14° / 5° 6 25 0 130 mm
Good
February 15° / 5° 6 22 0 120 mm
Good
March 16° / 6° 7 24 0 117 mm
Ok
April 20° / 8° 3 27 0 34 mm
Good
May 23° / 9° 2 29 0 17 mm
Perfect
June 26° / 12° 1 29 0 6 mm
Perfect
July 28° / 13° 0 31 0 1 mm
Perfect
August 28° / 13° 0 31 0 0 mm
Perfect
September 28° / 13° 0 30 0 4 mm
Perfect
October 24° / 12° 2 29 0 45 mm
Perfect
November 17° / 8° 4 26 0 67 mm
Good
December 13° / 5° 7 24 0 128 mm
Bad

Weather in Sonoma in September - FAQ

What is the average temperature in Sonoma in September?
The average temperature in Sonoma in September is 13/28° C.
What is the chance of rain in Sonoma in September?
On average, there are 0 rainy days in Sonoma during September.
Weather wise, is September a good time to visit Sonoma?
The weather in Sonoma in September is perfect.
Can it snow in Sonoma in September?
On average, there are 0 snowy days in Sonoma in September.
More about the weather in Sonoma