Weather in September 2025

San Luis Obispo weather in September 2025

°C °F

The average weather in San Luis Obispo in September

The temperatures in San Luis Obispo in September are comfortable with low of 16°C and and high up to 28°C.

There shouldn't be any rainy days in in San Luis Obispo during September. Having said that, the days are very hot in September so hanging out outside is more recomanded during the after noons and evening time.

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

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

Temperatures
28° / 16°
Rainy Days
0
Snowy Days
0
Dry Days
30
Rainfall
6
mm
Sun Hours
11.5
Hrs

Explore the weather in San Luis Obispo in other months

San Luis Obispo annual weather

Month Temperatures Rainy Days Dry Days Snowy Days Rainfall Weather More details
January 18° / 8° 3 28 0 95 mm
Good
February 18° / 7° 4 25 0 74 mm
Good
March 19° / 8° 3 28 0 80 mm
Good
April 21° / 9° 2 28 0 24 mm
Good
May 22° / 10° 1 31 0 9 mm
Good
June 25° / 13° 0 30 0 2 mm
Perfect
July 27° / 15° 0 31 0 7 mm
Perfect
August 27° / 16° 0 31 0 1 mm
Perfect
September 28° / 16° 0 30 0 6 mm
Perfect
October 24° / 14° 1 30 0 22 mm
Perfect
November 20° / 10° 2 29 0 31 mm
Good
December 16° / 7° 3 28 0 65 mm
Good

Weather in San Luis Obispo in September - FAQ

What is the average temperature in San Luis Obispo in September?
The average temperature in San Luis Obispo in September is 16/28° C.
What is the chance of rain in San Luis Obispo in September?
On average, there are 0 rainy days in San Luis Obispo during September.
Weather wise, is September a good time to visit San Luis Obispo?
The weather in San Luis Obispo in September is perfect.
Can it snow in San Luis Obispo in September?
On average, there are 0 snowy days in San Luis Obispo in September.
More about the weather in San Luis Obispo