Monthly weather forecast and climate
Rio del Mar, CA

Weather in January

January, like December, is a moderate winter month in Rio del Mar, California, with average temperature ranging between max 58.6°F (14.8°C) and min 46.9°F (8.3°C). In January, the average high-temperature is almost the same as in December - a still mild 58.6°F (14.8°C). Weather in January »

Weather in February

February, the last month of the winter, in Rio del Mar, is also a moderate month, with average temperature varying between 45.5°F (7.5°C) and 59.4°F (15.2°C). In Rio del Mar, California, the average high-temperature is essentially the same as in January - a still mild 59.4°F (15.2°C). Weather in February »

Weather in March

March, the first month of the spring, in Rio del Mar, is also a moderate month, with average temperature varying between 60.4°F (15.8°C) and 45.9°F (7.7°C). In Rio del Mar, the average high-temperature is almost the same as in February - a still mild 60.4°F (15.8°C). Weather in March »

Weather in April

April in Rio del Mar, California, is an enjoyable spring month, with average temperature ranging between max 63.1°F (17.3°C) and min 47.3°F (8.5°C). In Rio del Mar, the average high-temperature in April is practically the same as in March - a comfortable 63.1°F (17.3°C). Weather in April »

Weather in May

The last month of the spring, May, is another comfortable month in Rio del Mar, California, with average temperature varying between 64.9°F (18.3°C) and 49.1°F (9.5°C). In May, the average high-temperature is almost the same as in April - a still enjoyable 64.9°F (18.3°C). Weather in May »

Weather in June

June, the first month of the summer, in Rio del Mar, is a pleasant month, with temperature in the range of an average high of 70°F (21.1°C) and an average low of 51.4°F (10.8°C). In June, the average high-temperature is relatively the same as in May - an agreeable 70°F (21.1°C). Weather in June »

Weather in July

July, the same as June, in Rio del Mar, California, is another pleasant summer month, with temperature in the range of an average low of 53.4°F (11.9°C) and an average high of 72.5°F (22.5°C). In July, the average high-temperature is essentially the same as in June - a still pleasant 72.5°F (22.5°C). Weather in July »

Weather in August

The last month of the summer, August, is another pleasant month in Rio del Mar, California, with average temperature varying between 54.7°F (12.6°C) and 73°F (22.8°C). August and September, with an average high-temperature of 73°F (22.8°C), are the warmest months. Weather in August »

Weather in September

September, the first month of the autumn, in Rio del Mar, is still a pleasant month, with temperature in the range of an average low of 55.2°F (12.9°C) and an average high of 73°F (22.8°C). August and September, with an average high-temperature of 73°F (22.8°C), are the warmest months. Weather in September »

Weather in October

October, like September, is another pleasant autumn month in Rio del Mar, California, with temperature in the range of an average high of 69.4°F (20.8°C) and an average low of 53.8°F (12.1°C). In Rio del Mar, the average high-temperature in October is relatively the same as in September - a still agreeable 69.4°F (20.8°C). Weather in October »

Weather in November

November, the last month of the autumn, in Rio del Mar, is also an enjoyable month, with average temperature varying between 49.6°F (9.8°C) and 62.8°F (17.1°C). In November, the average high-temperature slightly decreases, from a pleasant 69.4°F (20.8°C) in October, to a comfortable 62.8°F (17.1°C). Weather in November »

Weather in December

December, the first month of the winter, in Rio del Mar, is still a mild month, with average temperature ranging between min 46.2°F (7.9°C) and max 57.2°F (14°C). With an average high-temperature of 57.2°F (14°C) and an average low-temperature of 46.2°F (7.9°C), December is the coldest month. Weather in December »
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FAQ

How much does it rain in Rio del Mar?

In Rio del Mar, California, during the entire year, the rain falls for 77.9 days and collects up to 14.45" (367mm) of precipitation.

What is the month with the lowest UV index in Rio del Mar?

February and November, with an average maximum UV index of 3, are months with the lowest UV index in Rio del Mar, California.

What is the most humid month in Rio del Mar?

March is the most humid month, with an average relative humidity of 75%.

When is the ocean coldest in Rio del Mar?

The month with the coldest seawater is April, with an average ocean temperature of 53.8°F (12.1°C).

When are the longest days in Rio del Mar?

June has the longest days of the year, with an average of 14.7h of daylight.

When is the highest UV index in Rio del Mar?

Months with the highest UV index in Rio del Mar, California, are June through September, with an average maximum UV index of 5.

What is the driest month in Rio del Mar?

Months with the least rainfall in Rio del Mar are July and August Rain falls for 2.8 days and accumulates 0.04" (1mm) of rain.

What month has the most sunshine in Rio del Mar?

The month with the most sunshine in Rio del Mar, California, is July, with an average of 11.7h of sunshine.

What is the warmest month in Rio del Mar?

August and September, with an average high-temperature of 73°F (22.8°C), are warmest months.

What are the months with the warmest ocean in Rio del Mar?

Months with the warmest seawater are August and September, with an average ocean temperature of 58.1°F (14.5°C).

What is the least humid month in Rio del Mar?

October is the least humid month in Rio del Mar, with an average relative humidity of 68%.

What is the coldest month in Rio del Mar?

The coldest month in Rio del Mar is December, with an average high-temperature of 57.2°F (14°C) and an average low-temperature of 46.2°F (7.9°C).

What is the rainiest month in Rio del Mar?

The month with the most rainfall is December when the rain falls for 10.3 days and typically aggregates up to 2.8" (71mm) of precipitation.

What is the month with the shortest days in Rio del Mar?

With an average of 9.7h of daylight, December has the shortest days of the year in Rio del Mar.

What is the month with the least sunshine in Rio del Mar?

With an average of 5.8h of sunshine, December has the least sunshine of the year in Rio del Mar, California.

Average temperature
Rio del Mar, CA

Average temperature - Rio del Mar, CA

The warmest months (with the highest average high temperature) are August and September (73°F).
The month with the lowest average high temperature is December (57.2°F).

The month with the highest average low temperature is September (55.2°F).
The coldest month (with the lowest average low temperature) is February (45.5°F).

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Average pressure
Rio del Mar, CA

Average pressure - Rio del Mar, CA

The month with the highest atmospheric pressure is January (30.13").
The month with the lowest atmospheric pressure is September (29.92").

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Average wind speed
Rio del Mar, CA

Average wind speed - Rio del Mar, CA

The windiest month (with the highest average wind speed) is April (7.4mph).
The calmest months (with the lowest average wind speed) are July and August (5.5mph).

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Average rainfall
Rio del Mar, CA

Average rainfall - Rio del Mar, CA

The wettest month (with the highest rainfall) is December (2.8").
The driest months (with the least rainfall) are July and August (0.04").

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Average rainfall days
Rio del Mar, CA

Average rainfall days - Rio del Mar, CA

The month with the highest number of rainy days is March (13.4 days).
The month with the least rainy days is August (1.2 days).

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Average sea temperature
Rio del Mar, CA

Average sea temperature - Rio del Mar, CA

The best months for swimming (with the highest average sea temperature) are August and September (58.1°F).
The coldest month (with the lowest average sea temperature) is April (53.8°F).

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Average daylight / Average sunshine
Rio del Mar, CA

Average daylight / Average sunshine - Rio del Mar, CA

The month with the longest days is June (Average daylight: 14.7h).
The month with the shortest days is December (Average daylight: 9.7h).

The month with the most sunshine is July (Average sunshine: 11.7h).
The month with the least sunshine is December (Average sunshine: 5.8h).

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Average sunshine days
Rio del Mar, CA

Average sunshine days - Rio del Mar, CA

The month with the most sunshine days is August (27.8 days).
The month with the least sunshine days is March (16.4 days).

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Average UV index
Rio del Mar, CA

Average UV index - Rio del Mar, CA

Months with the highest UV index are June, July, August and September (UV index 5).
Months with the lowest UV index are February and November (UV index 3).

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Average visibility
Rio del Mar, CA

Average visibility - Rio del Mar, CA

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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