Weather in San Luis Obispo County, United States in December

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Visiting San Luis Obispo County, United States in December

The weather in December is much colder than the previous month. December has average maximum temperatures of 17°C (63°F) which is not that warm but sunbathing may be possible on some clear days. 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. It is not a good time for sunbathing in San Luis Obispo County.

December has total rainfall of 8cm (3.1inches) making it mostly dry with only intermittent light showers. There are only 10.1 days with some rainfall so you can still enjoy the beach on the majority of days.

Sea temperatures are a cold 15°C (58°F). December is too cold for swimming in San Luis Obispo County for any length of time, unless you have a wetsuit. The sea temperature in December is slightly cooler than the previous month.

Consider visiting San Luis Obispo County in the months of June, July, August, September, for the best beach weather. Also consider one of our other suggestions for December.

Can you sunbathe in San Luis Obispo County in December?

No, December is not a good time for sunbathing in San Luis Obispo County.

December has average maximum temperatures of 17°C (63°F) which is not that warm but sunbathing may be possible on some clear days. 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. December has total rainfall of 8cm (3.1inches) making it mostly dry with only intermittent light showers. There are only 10.1 days with some rainfall so you can still enjoy the beach on the majority of days.

More about December temperature and sunshine.

Can you swim in San Luis Obispo County in December?

No, December is too cold for swimming in San Luis Obispo County for any length of time, with the sea water at 15°C (58°F), unless you have a wetsuit.

More about December sea temperatures.

Is December a good time to holiday in San Luis Obispo County?

Yes, December is a slightly cool time for a holiday in San Luis Obispo County.

December has average maximum temperatures of 17°C (63°F) which is not that warm but sunbathing may be possible on some clear days. 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. December has total rainfall of 8cm (3.1inches) making it mostly dry with only intermittent light showers. There are only 10.1 days with some rainfall so you can still enjoy the beach on the majority of days. It is not a good time for sunbathing in San Luis Obispo County. Sea temperatures are a cold 15°C (58°F). December is too cold for swimming in San Luis Obispo County for any length of time, unless you have a wetsuit.

More about the December temperatures and sunshine.

Is San Luis Obispo County warm in December?

No, San Luis Obispo County is not that warm but sunbathing may be possible on some clear days in December.

The average maximum temperature in San Luis Obispo County in December is 17°C (63°F). The average maximum temperature is 21°C (70°) in the previous month and 18°C (64°F) in the next month.

The average temperature in San Luis Obispo County in December is 11°C (51°F). The average temperature is 14°C (57°F) in the previous month and 11°C (52°F) in the next month.

More info about the December temperatures and sunshine.

How sunny is San Luis Obispo County in December?

The average day light hours per day in San Luis Obispo County in December are 9.8. 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 about December sunshine.

Temperature in San Luis Obispo County in December

The weather in December is much colder than the previous month. The average maximum temperature in San Luis Obispo County in December is 17°C (63°F). The average maximum temperature is 21°C (70°F) in the previous month and 18°C (64°F) in the next month.

The average temperature in San Luis Obispo County in December is 11°C (51°F). The average temperature is 14°C (57°F) in the previous month and 11°C (52°F) in the next month.

The average minimum temperature in San Luis Obispo County in December is 4°C (39°F). The minimum temperature is 6°C (43°F) in the previous month and 4°C (39°F) in the next month.

Sunshine in San Luis Obispo County in December

The days in December are slightly shorter than the previous month. December has fewer hours of sunshine than the previous month. During December the average day light hours are 9.8 per day in San Luis Obispo County. 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 in San Luis Obispo County in December is typically 2.8 during December. An ultraviolet index reading of 0 to 2 indicates low danger from the sun's UV rays for the average person. Most people will be able to spend several hours in the sun with out a problem, however unprotected skin risks burning in less than 1 hour. Wear sunglasses on bright days. Only those that burn easily will need to apply sunscreen. Watch out for relections from water that may increase ultraviolet exposure.

Sea Temperature in San Luis Obispo County in December

The average sea water temperature in San Luis Obispo County in December is 14.7°C (58.5°F) which is cold for swimming, a full wet suit is required to spend any length of time in the sea. The sea temperature in December is slightly cooler than the previous month.

Rainfall in San Luis Obispo County in December

December weather is much wetter than the previous month and rainfall continues to rise slightly into January. December has a few more days of rain than the previous month. The average total rainfall in San Luis Obispo County in December is 8cm (3.1inches) and on average there are 10.1 rainy days in December making it a pretty wet time to visit the beach.

Humidity in San Luis Obispo County in December

The maximum dew point (an indicator of humidity) in San Luis Obispo County in December is 7°C (45°F) which is a bit dry for some. The dew point is 9°C (47°F) in the previous month and 7°C (7°F) in the next month.

The average maximum relative humidity in San Luis Obispo County in December is typically 89.6%. The maximum relative humidity is 88.8% in the previous month and 88.9% in the next month.

The average relative humidity in San Luis Obispo County in December is typically 70.5%. The average relative humidity is 66.7% in the previous month and 68.9% in the next month.

Wind Speed in San Luis Obispo County in December

The average maximum wind speed in San Luis Obispo County in December is typically 23KM/H (14MPH). The average maximum wind speed is 23KM/H (14MPH) in the previous month and 23KM/H (14MPH) in the next month.

The average wind speed in San Luis Obispo County in December is typically 7KM/H (4MPH). The average wind speed is 7KM/H (4MPH) in the previous month and 7KM/H (4MPH) in the next month.

The average wind direction in San Luis Obispo County in December is from the West.

Monthly Averages

Suggested Beaches in December

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Beaches recommended for you today, this weekend, in the next 2 weeks or in any month of the year.

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Need Inspiration?

Beaches recommended for you today, this weekend, in the next 2 weeks or in any month of the year.