Annual average weather for San Luis Obispo County, United States

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Annual Average Weather for San Luis Obispo County, United States

The annual average maximum daily temperature is 23.1°C (73.6°F) which is warm and makes sunbathing pleasant on clear days. The annual average water temperature is typically 16.0°C (60.8°F) which is cool for swimming, shorty wetsuit may help you extend your time in the water. Annually there are on average 5.1 days of rain per month and 8.8 hours of sun per day.

When is the best time to visit San Luis Obispo County?

The best months to visit San Luis Obispo County are June, July, August, September, for the best beach weather, the most sunshine and optimal sunbathing and swimming conditions with the least chance of rain.

The weather is perfect for sunbathing in the months from December to September when the maximum temperature reaches above 26°C (72°F)

The sea is best for swimming between May and October when the sea temperature is above the average 16°C (61°F) which is cool for swimming, shorty wetsuit may help you extend your time in the water.

Can you sunbathe in San Luis Obispo County year round?

No, you can't sunbathe in San Luis Obispo County all year round. Some months are too cold for sunbathing, however you might enjoy other beach activities such as taking a walk, going hiking along trails or just enjoying the scenery.

The weather is best for sunbathing in the months from December to September when the maximum temperature reaches above 26°C (72°F)

More info about the annual temperatures and sunshine.

Can you swim in San Luis Obispo County year round?

No, you can't swim in San Luis Obispo County all year round.

The warmest sea water temperatures in San Luis Obispo County are found in September when they peak at 19°C (66°F) and lowest in April when they dip to 14°C (58°F).

The sea temperature is above average for swimming between May and October when the sea temperature is above 16°C (61°F) which is cool for swimming, shorty wetsuit may help you extend your time in the water.

More info about the annual sea temperatures

When is the hottest month in San Luis Obispo County?

The hottest month in San Luis Obispo County is August when the average maximum temperature is very warm and perfect for sunbathing on clear days 29°C (84°F), average temperature is 20°C (69°F) and average minimum temperature is 13°C (55°F).

More info about the annual temperatures and sunshine.

When is the coldest month in San Luis Obispo County?

The coolest month in San Luis Obispo County is January when the average maximum temperature is 18°C (64°F), average temperature is 11°C (52°F) and average minimum temperature is 4°C (39°F).

More info about the annual temperatures and sunshine

When is the sunniest month in San Luis Obispo County?

The sunniest days in San Luis Obispo County are in July which has the most hours of sunshine per day. In July the sunshine percentage is 79% making it sunny and pleasant most of the time. The hours of sunshine per day are 11.2hrs making the days very long and bright.

More info about the annual sunshine.

When is the least sunny month in San Luis Obispo County?

December has the least sunshine. In December the sunshine percentage is 60% making it quite sunny but with occasional periods of cloudy and overcast skies. There are 5.9 hours of sunshine per day.

More info about the annual sunshine.

When is the driest month in San Luis Obispo County?

The driest month in San Luis Obispo County is July with 0.3cm (0.1inches) of rain and the least days of rain with 0.4 days with some rain, an extremely dry time to visit the beach.

More info about the annual rainfall

When is the wettest month in San Luis Obispo County?

The wettest month in San Luis Obispo County is January with 8.1cm (3.2inches) of rain and February has the most days of rain with 11.5 days with some rain, a pretty wet time to visit the beach.

More info about the annual rainfall.

When is the sea the coldest in San Luis Obispo County?

The coldest sea water temperatures in San Luis Obispo County are found in April when they dip to 14°C (58°F) which is cold for swimming, a full wet suit is required to spend any length of time in the sea.

More info about the annual sea temperatures.

When is the sea the warmest in San Luis Obispo County?

The warmest sea water temperatures in San Luis Obispo County are found in September when they peak at 19°C (66°F) which is cool for swimming, shorty wetsuit may help you extend your time in the water.

More info about the annual sea temperatures.

When is the most humid month in San Luis Obispo County?

The most humid month in San Luis Obispo County is July with a dew point (an indicator of humidity) of 13°C (55°F) which is very comfortable.

More info about the annual humidity.

When is the least humid month in San Luis Obispo County?

The least humid month in San Luis Obispo County is January with a dew point of 7°C (44°F) which is a bit dry for some.

More info about the annual humidity.

When is the windiest month in San Luis Obispo County?

The most windy month in San Luis Obispo County is May when the average maximum windspeed is 32KM/H (20MPH) and the average wind speed is 12KM/H (7MPH).

More info about the annual wind conditions.

Annual Temperature for San Luis Obispo County

The hottest month in San Luis Obispo County is August when the average maximum temperature is 29°C (84°F), average temperature is 20°C (69°F) and average minimum temperature is 13°C (55°F).

The coolest month in San Luis Obispo County is January when the average maximum temperature is 18°C (18°F), average temperature is 11°C (52°F) and average minimum temperature is 4°C (39°F).

Annual Sunshine for San Luis Obispo County

The longest days in San Luis Obispo County are in June, with an average of 14.5 hours of daylight per day. December has the shortest days with an average of 9.8 hours of daylight per day.

The sunniest days in San Luis Obispo County are in July which has the most hours of sunshine per day. The sunshine percentage is 79% making it sunny and pleasant most of the time. The hours of sunshine per day are 11.2hrs making the days very long and bright.

December has the least sunshine. The sunshine percentage is 60% making it quite sunny but with occasional periods of cloudy and overcast skies. There are 5.9 hours of sunshine per day.

The ultraviolet index is the highest in July when it reaches 11.3 and lowest in December when it reaches 2.8.

An ultraviolet index reading above 11 indicates an extreme risk of harm from unprotected sun exposure. Unprotected skin risks burning in less than 10 minutes. Take all precautions because unprotected skin and eyes can burn in minutes. Tanning will be safest before 10am and after 4pm but only with a good application of sun screen. For those with sensitive skin stay in the shade and wear protective clothing, a wide-brimmed hat, and UV-blocking sunglasses. Generously apply broad spectrum SPF 30+ sunscreen every 2 hours, even on cloudy days. Watch out for relections from water that may increase ultraviolet exposure.

Annual Sea Temperature for San Luis Obispo County

The warmest sea water temperatures in San Luis Obispo County are found in September when they peak at 19°C (66°F) and lowest in April when they dip to 14°C (58°F).

The sea is best for swimming between May and October when the temperature is above 16°C (61°F) which is cool for swimming, shorty wetsuit may help you extend your time in the water.

Annual Rainfall for San Luis Obispo County

The wettest month in San Luis Obispo County is January with 8.1cm (3.2inches) of rain and February has the most days of rain with 11.5 days with some rain, a pretty wet time to visit the beach.

The driest month in San Luis Obispo County is July with 0.3cm (0.1inches) of rain and the least days of rain with 0.4 days with some rain, an extremely dry time to visit the beach.

Annual Humidity for San Luis Obispo County

The most humid month in San Luis Obispo County is July with a dew point (an indicator of humidity) of 13°C (55°F) which is very comfortable.

The least humid month in San Luis Obispo County is January with a dew point of 7°C (44°F) which is a bit dry for some.

Annual Wind Speed for San Luis Obispo County

The most windy month in San Luis Obispo County is May when the average maximum windspeed is 32KM/H (20MPH) and the average wind speed is 12KM/H (7MPH).

The least windy month in San Luis Obispo County is December when the average maximum windspeed is 23KM/H (14MPH) and the average wind speed is 7KM/H (4MPH).

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