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The temperatures in San Luis Obispo in August are comfortable with low of 16°C and and high up to 27°C.
As it is almost never rain during August in San Luis Obispo the weather is perfect for hanging out outside and exploring all that San Luis Obispo has to offer.
Our weather forecast can give you a great sense of what weather to expect in San Luis Obispo in August 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.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 18° / 8° | 3 | 28 | 0 | 95 mm | Good | San Luis Obispo in January |
| February | 18° / 7° | 4 | 25 | 0 | 74 mm | Good | San Luis Obispo in February |
| March | 19° / 8° | 3 | 28 | 0 | 80 mm | Good | San Luis Obispo in March |
| April | 21° / 9° | 2 | 28 | 0 | 24 mm | Good | San Luis Obispo in April |
| May | 22° / 10° | 1 | 31 | 0 | 9 mm | Good | San Luis Obispo in May |
| June | 25° / 13° | 0 | 30 | 0 | 2 mm | Perfect | San Luis Obispo in June |
| July | 27° / 15° | 0 | 31 | 0 | 7 mm | Perfect | San Luis Obispo in July |
| August | 27° / 16° | 0 | 31 | 0 | 1 mm | Perfect | San Luis Obispo in August |
| September | 28° / 16° | 0 | 30 | 0 | 6 mm | Perfect | San Luis Obispo in September |
| October | 24° / 14° | 1 | 30 | 0 | 22 mm | Perfect | San Luis Obispo in October |
| November | 20° / 10° | 2 | 29 | 0 | 31 mm | Good | San Luis Obispo in November |
| December | 16° / 7° | 3 | 28 | 0 | 65 mm | Good | San Luis Obispo in December |