Annual average weather for Muir Beach, Marin County, United States

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Annual Average Weather for Muir Beach, Marin County, United States

The annual average maximum daily temperature is 18.7°C (65.7°F) which is not that warm but sunbathing may be possible on some clear days. The annual average water temperature is typically 16.1°C (61.0°F) which is cool for swimming, shorty wetsuit may help you extend your time in the water. Annually there are on average 5.8 days of rain per month and 8.3 hours of sun per day.

When is the best time to visit Muir Beach?

The best months to visit Muir Beach 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 warm enough for sunbathing in the months from July to September when the maximum temperature reaches above 22°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 Muir Beach year round?

No, you can't sunbathe in Muir Beach 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 warm enough for sunbathing in the months from July to September when the maximum temperature reaches above 22°C (72°F)

More info about the annual temperatures and sunshine.

Can you swim in Muir Beach year round?

No, you can't swim in Muir Beach all year round.

The warmest sea water temperatures in Muir Beach are found in September when they peak at 20°C (67°F) and lowest in March when they dip to 13°C (55°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.

The sea is good for swimming in the months from August to September when the sea temperature is above 19°C (66°F)

More info about the annual sea temperatures

When is the hottest month in Muir Beach?

The hottest month in Muir Beach is September when the average maximum temperature is nice and warm and makes sunbathing pleasant on clear days 23°C (74°F), average temperature is 19°C (65°F) and average minimum temperature is 14°C (56°F).

More info about the annual temperatures and sunshine.

When is the coldest month in Muir Beach?

The coolest month in Muir Beach is January when the average maximum temperature is 14°C (57°F), average temperature is 10°C (51°F) and average minimum temperature is 7°C (44°F).

More info about the annual temperatures and sunshine

When is the sunniest month in Muir Beach?

The sunniest days in Muir Beach are in June which has the most hours of sunshine per day. In June the sunshine percentage is 76% 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 Muir Beach?

December has the least sunshine. In December the sunshine percentage is 53% making it quite sunny but with occasional periods of cloudy and overcast skies. There are 5.1 hours of sunshine per day.

More info about the annual sunshine.

When is the driest month in Muir Beach?

The driest month in Muir Beach is July with 0cm (0inches) of rain and the least days of rain with 0.1 days with some rain, an extremely dry time to visit the beach.

More info about the annual rainfall

When is the wettest month in Muir Beach?

The wettest month in Muir Beach is December with 12.6cm (5.0inches) of rain and February has the most days of rain with 12.6 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 Muir Beach?

The coldest sea water temperatures in Muir Beach are found in March when they dip to 13°C (55°F) which is very cold and bracing, it's not recommended you swim with out a full wet suit.

More info about the annual sea temperatures.

When is the sea the warmest in Muir Beach?

The warmest sea water temperatures in Muir Beach are found in September when they peak at 20°C (67°F) which is comfortable for swimming though some may prefer warmer water.

More info about the annual sea temperatures.

When is the most humid month in Muir Beach?

The most humid month in Muir Beach is September with a dew point (an indicator of humidity) of 14°C (56°F) which is comfortable for everyone.

More info about the annual humidity.

When is the least humid month in Muir Beach?

The least humid month in Muir Beach is January with a dew point of 8°C (47°F) which is a bit dry for some.

More info about the annual humidity.

When is the windiest month in Muir Beach?

The most windy month in Muir Beach is May when the average maximum windspeed is 43KM/H (27MPH) and the average wind speed is 22KM/H (14MPH).

More info about the annual wind conditions.

Annual Temperature for Muir Beach

The hottest month in Muir Beach is September when the average maximum temperature is 23°C (74°F), average temperature is 19°C (65°F) and average minimum temperature is 14°C (56°F).

The coolest month in Muir Beach is January when the average maximum temperature is 14°C (14°F), average temperature is 10°C (51°F) and average minimum temperature is 7°C (44°F).

Annual Sunshine for Muir Beach

The longest days in Muir Beach are in June, with an average of 14.8 hours of daylight per day. December has the shortest days with an average of 9.6 hours of daylight per day.

The sunniest days in Muir Beach are in June which has the most hours of sunshine per day. The sunshine percentage is 76% 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 53% making it quite sunny but with occasional periods of cloudy and overcast skies. There are 5.1 hours of sunshine per day.

The ultraviolet index is the highest in July when it reaches 10.6 and lowest in December when it reaches 2.2.

An ultraviolet index reading of 8 to 10 indicates a very high risk of harm from unprotected sun exposure. Unprotected skin risks burning in less than 15 minutes. Take extra precautions because unprotected skin and eyes will be damaged and can burn quickly. 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 Muir Beach

The warmest sea water temperatures in Muir Beach are found in September when they peak at 20°C (67°F) and lowest in March when they dip to 13°C (55°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 Muir Beach

The wettest month in Muir Beach is December with 12.6cm (5.0inches) of rain and February has the most days of rain with 12.6 days with some rain, a pretty wet time to visit the beach.

The driest month in Muir Beach is July with 0cm (0inches) of rain and the least days of rain with 0.1 days with some rain, an extremely dry time to visit the beach.

Annual Humidity for Muir Beach

The most humid month in Muir Beach is September with a dew point (an indicator of humidity) of 14°C (56°F) which is comfortable for everyone.

The least humid month in Muir Beach is January with a dew point of 8°C (47°F) which is a bit dry for some.

Annual Wind Speed for Muir Beach

The most windy month in Muir Beach is May when the average maximum windspeed is 43KM/H (27MPH) and the average wind speed is 22KM/H (14MPH).

The least windy month in Muir Beach is January when the average maximum windspeed is 26KM/H (16MPH) and the average wind speed is 10KM/H (6MPH).

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