Monthly weather forecast and climate
San Marino, CA

Weather in January

January, the same as December, is another comfortable winter month in San Marino, California, with average temperature ranging between max 65.1°F (18.4°C) and min 48.4°F (9.1°C). In San Marino, the average high-temperature is relatively the same as in December - a still comfortable 65.1°F (18.4°C). Weather in January »

Weather in February

February, the last month of the winter, in San Marino, is another comfortable month, with average temperature fluctuating between 47.1°F (8.4°C) and 64.9°F (18.3°C). In San Marino, the average high-temperature is almost the same as in January - a still comfortable 64.9°F (18.3°C). Weather in February »

Weather in March

March, the first month of the spring, in San Marino, is an agreeable month, with average temperature ranging between max 68°F (20°C) and min 48.7°F (9.3°C). In San Marino, the average high-temperature in March is relatively the same as in February - an agreeable 68°F (20°C). Weather in March »

Weather in April

April, the same as March, in San Marino, California, is an agreeable spring month, with average temperature fluctuating between 72.1°F (22.3°C) and 51.4°F (10.8°C). In April, the average high-temperature is almost the same as in March - a still agreeable 72.1°F (22.3°C). Weather in April »

Weather in May

May, the last month of the spring, in San Marino, is a moderately hot month, with average temperature ranging between min 54.5°F (12.5°C) and max 74.8°F (23.8°C). In San Marino, the average high-temperature is essentially the same as in April - a warm 74.8°F (23.8°C). Weather in May »

Weather in June

June, the first month of the summer, in San Marino, is still a warm month, with temperature in the range of an average high of 80.2°F (26.8°C) and an average low of 57.7°F (14.3°C). In San Marino, the average high-temperature slightly increases, from a warm 74.8°F (23.8°C) in May, to a still moderately hot 80.2°F (26.8°C). Weather in June »

Weather in July

July, the same as June, is another warm summer month in San Marino, California, with temperature in the range of an average high of 85.5°F (29.7°C) and an average low of 63.3°F (17.4°C). In San Marino, California, the average high-temperature in July is relatively the same as in June - a still moderately hot 85.5°F (29.7°C). Weather in July »

Weather in August

The last month of the summer, August, is a tropical month in San Marino, California, with average temperature fluctuating between 87.1°F (30.6°C) and 64.8°F (18.2°C). With an average high-temperature of 87.1°F (30.6°C) and an average low-temperature of 64.8°F (18.2°C), August is the warmest month. The average heat index in August is estimated at a hot 90°F (32.2°C). Weather in August »

Weather in September

The first month of the autumn, September, is still a warm month in San Marino, California, with average temperature varying between 63.5°F (17.5°C) and 84.7°F (29.3°C). In San Marino, the average high-temperature is relatively the same as in August - a moderately hot 84.7°F (29.3°C). Weather in September »

Weather in October

October, like September, in San Marino, California, is a moderately hot autumn month, with average temperature varying between 78.1°F (25.6°C) and 59.4°F (15.2°C). In October, the average high-temperature marginally drops, from 84.7°F (29.3°C) in September, to a still warm 78.1°F (25.6°C). Weather in October »

Weather in November

November, the last month of the autumn, in San Marino, is also an agreeable month, with average temperature fluctuating between 70.9°F (21.6°C) and 53.1°F (11.7°C). In November, the average high-temperature slightly decreases, from a moderately hot 78.1°F (25.6°C) in October, to a pleasant 70.9°F (21.6°C). Weather in November »

Weather in December

The first month of the winter, December, is still a comfortable month in San Marino, California, with temperature in the range of an average high of 63.1°F (17.3°C) and an average low of 47.5°F (8.6°C). With an average high-temperature of 63.1°F (17.3°C) and an average low-temperature of 47.5°F (8.6°C), December is the coldest month. Weather in December »
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FAQ

How much does it rain in San Marino?

In San Marino, during the entire year, the rain falls for 45 days and collects up to 6.61" (168mm) of precipitation.

What is the month with the least sunshine in San Marino?

January, February and December, with an average of 6.9h of sunshine, are months with the least sunshine in San Marino.

What are the months with the lowest UV index in San Marino?

January, February, November and December, with an average maximum UV index of 4, are months with the lowest UV index.

What is the most humid month in San Marino?

With an average relative humidity of 59%, June is the most humid month.

What is the driest month in San Marino?

The month with the least rainfall is June when the rain falls for 1.2 days and typically collects 0.04" (1mm) of precipitation.

When are the longest days in San Marino?

The month with the longest days in San Marino, California, is June, with an average of 14.4h of daylight.

When is the highest UV index in San Marino?

June through September, with an average maximum UV index of 6, are months with the highest UV index.

What month has the most sunshine in San Marino?

With an average of 12.1h of sunshine, July has the most sunshine of the year in San Marino, California.

What is the warmest month in San Marino?

The warmest month in San Marino is August, with an average high-temperature of 87.1°F (30.6°C) and an average low-temperature of 64.8°F (18.2°C).

What is the least humid month in San Marino?

November is the least humid month in San Marino, with an average relative humidity of 47%.

What is the coldest month in San Marino?

December is the coldest month, with an average high-temperature of 63.1°F (17.3°C) and an average low-temperature of 47.5°F (8.6°C).

What is the rainiest month in San Marino?

The month with the most rainfall is December when the rain falls for 4.9 days and typically aggregates up to 1.34" (34mm) of precipitation.

What is the month with the shortest days in San Marino?

With an average of 9.9h of daylight, December has the shortest days of the year in San Marino, California.

Average temperature
San Marino, CA

Average temperature - San Marino, CA

The warmest month (with the highest average high temperature) is August (87.1°F).
The month with the lowest average high temperature is December (63.1°F).

The month with the highest average low temperature is August (64.8°F).
The coldest month (with the lowest average low temperature) is February (47.1°F).

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Average pressure
San Marino, CA

Average pressure - San Marino, CA

The month with the highest atmospheric pressure is January (30.1").
The month with the lowest atmospheric pressure is June (29.88").

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Average wind speed
San Marino, CA

Average wind speed - San Marino, CA

The windiest month (with the highest average wind speed) is April (5.7mph).
The calmest month (with the lowest average wind speed) is September (4.4mph).

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Average rainfall
San Marino, CA

Average rainfall - San Marino, CA

The wettest month (with the highest rainfall) is December (1.34").
The driest month (with the least rainfall) is June (0.04").

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Average rainfall days
San Marino, CA

Average rainfall days - San Marino, CA

The month with the highest number of rainy days is March (5.8 days).
The month with the least rainy days is June (1.2 days).

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Average daylight / Average sunshine
San Marino, CA

Average daylight / Average sunshine - San Marino, CA

The month with the longest days is June (Average daylight: 14.4h).
The month with the shortest days is December (Average daylight: 9.9h).

The month with the most sunshine is July (Average sunshine: 12.1h).
Months with the least sunshine are January, February and December (Average sunshine: 6.9).

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Average sunshine days
San Marino, CA

Average sunshine days - San Marino, CA

The month with the most sunshine days is June (27.1 days).
The month with the least sunshine days is February (22.3 days).

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Average UV index
San Marino, CA

Average UV index - San Marino, CA

Months with the highest UV index are June, July, August and September (UV index 6).
Months with the lowest UV index are January, February, November and December (UV index 4).

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Average visibility
San Marino, CA

Average visibility - San Marino, 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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