San Luis Obispo weather in September 2025

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

Snowy Days

Dry Days

Rainfall

Sun Hours

11.5

Hrs

Sun	Mon	Tue	Wed	Thu	Fri	Sat
	1 27° /15°	2 27° /16°	3 28° /17°	4 30° /17°	5 30° /17°	6 30° /16°
7 30° /17°	8 31° /17°	9 30° /16°	10 26° /15°	11 29° /15°	12 26° /14°	13 23° /13°
14 23° /12°	15 22° /11°	16 22° /11°	17 21° /11°	18 21° /10°	19 20° /12°	20 21° /12°
21 21° /11°	22 24° /12°	23 27° /14°	24 26° /13°	25 24° /12°	26 28° /12°	27 30° /14°
28 28° /13°	29 28° /13°	30 25° /14°

Explore the weather in San Luis Obispo in other months

San Luis Obispo annual weather

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

Temperatures in San Luis Obispo in September

Rain in San Luis Obispo in September

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