San Luis Obispo weather by month & the best time to visit
United States · seaside town · Mediterranean climate
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The best time to visit San Luis Obispo is June — its sunniest month (Sunshine Score 99/100), with July and August close behind. San Luis Obispo averages about 3,588 hours of sunshine a year. Daytime highs around 23°C / 73°F and roughly 6 mm of rain in June.
When is the best time to visit San Luis Obispo?
For sunshine, the best time to visit San Luis Obispo is June, then July and August. The dullest month is January (57/100, 79 mm of rain). The full month-by-month picture is in the table below.
How sunny is San Luis Obispo?
San Luis Obispo is one of the sunniest places on Earth: about 3,588 hours of sunshine a year. June (99/100) is noticeably better than January (57). It ranks #24 of 580 destinations in United States for annual sunshine, above the national median of 2,279 hours. Rain has a clear season: the wettest stretch, around January, carries about 55% of the annual 401 mm.
Sunshine Score by month
| Month | Score | Day high | Night low | Rain | UV | Sea |
|---|---|---|---|---|---|---|
| January | 57 | 16° / 61°F | 9° / 48°F | 79 mm | 3 | 15° / 59°F |
| February | 58 | 16° / 61°F | 9° / 48°F | 69 mm | 4 | 15° / 59°F |
| March | 66 | 17° / 63°F | 10° / 50°F | 62 mm | 6 | 15° / 59°F |
| April | 79 | 18° / 64°F | 10° / 50°F | 29 mm | 7 | 14° / 57°F |
| May | 97 | 20° / 68°F | 12° / 54°F | 14 mm | 9 | 15° / 59°F |
| June | 99 | 23° / 73°F | 13° / 55°F | 6 mm | 10 | 15° / 59°F |
| July | 99 | 24° / 75°F | 15° / 59°F | 4 mm | 10 | 17° / 63°F |
| August | 99 | 25° / 77°F | 15° / 59°F | 3 mm | 9 | 16° / 61°F |
| September | 99 | 25° / 77°F | 15° / 59°F | 6 mm | 8 | 16° / 61°F |
| October | 96 | 22° / 72°F | 14° / 57°F | 22 mm | 5 | 17° / 63°F |
| November | 86 | 19° / 66°F | 11° / 52°F | 34 mm | 3 | 13° / 55°F |
| December | 58 | 16° / 61°F | 9° / 48°F | 73 mm | 2 | 13° / 55°F |
Sea temperature in San Luis Obispo by month
The sea off San Luis Obispo is warmest in July at around 17°C / 63°F, and coolest in November at 13°C / 55°F. It never reaches comfortable swimming temperatures (21°C+). Month-by-month sea-surface temperatures are in the Sea column of the table above.
Nearest destinations
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Head-to-head
How San Luis Obispo compares month by month: San Luis Obispo vs Fresno · San Luis Obispo vs Santa Barbara · San Luis Obispo vs Monterey · all comparisons
San Luis Obispo: questions and answers
What kind of destination is San Luis Obispo?
San Luis Obispo is a seaside town in United States with a Mediterranean climate — the sea reaches 17°C at its warmest.
How many hours of sunshine does San Luis Obispo get a year?
San Luis Obispo gets about 3,588 hours of sunshine a year, at its best around June.
When is the best time to visit San Luis Obispo?
The sunniest time to visit San Luis Obispo is June, when the Sunshine Score peaks at 99/100 (with July and August close behind). Expect daytime highs around 23°C / 73°F.
What is the least sunny month in San Luis Obispo?
January is the least sunny month in San Luis Obispo, scoring 57/100 with about 79 mm of rain.
What is the sea temperature in San Luis Obispo?
The sea in San Luis Obispo ranges from about 13°C (November) to 17°C (July). Month-by-month sea temperatures are on this page.
How strong is the sun in San Luis Obispo?
The typical midday UV index in San Luis Obispo peaks around 10 (very high) in June, easing to about 2 (low) in December. Month-by-month midday UV values are in the UV column of the table on this page.
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