Monthly weather forecast and climate
San Rafael, CA

Weather in January

January, the same as December, in San Rafael, California, is a moderate winter month, with average temperature ranging between min 45.5°F (7.5°C) and max 56.1°F (13.4°C). In San Rafael, California, the average high-temperature is practically the same as in December - a still moderate 56.1°F (13.4°C). Weather in January »

Weather in February

February, the last month of the winter, in San Rafael, is another mild month, with temperature in the range of an average low of 45.9°F (7.7°C) and an average high of 57.9°F (14.4°C). In February, the average high-temperature is practically the same as in January - a still mild 57.9°F (14.4°C). Weather in February »

Weather in March

The first month of the spring, March, is still a mild month in San Rafael, California, with average temperature ranging between max 59.4°F (15.2°C) and min 46.9°F (8.3°C). In San Rafael, the average high-temperature is almost the same as in February - a still mild 59.4°F (15.2°C). Weather in March »

Weather in April

April is a comfortable spring month in San Rafael, California, with average temperature ranging between max 62.8°F (17.1°C) and min 48.6°F (9.2°C). In April, the average high-temperature is essentially the same as in March - a comfortable 62.8°F (17.1°C). Weather in April »

Weather in May

The last month of the spring, May, is another comfortable month in San Rafael, California, with average temperature fluctuating between 50.4°F (10.2°C) and 64.9°F (18.3°C). In San Rafael, 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

The first month of the summer, June, is a pleasant month in San Rafael, California, with temperature in the range of an average low of 53.2°F (11.8°C) and an average high of 69.1°F (20.6°C). In June, the average high-temperature is almost the same as in May - a pleasant 69.1°F (20.6°C). Weather in June »

Weather in July

July, like June, is another pleasant summer month in San Rafael, California, with temperature in the range of an average low of 54.3°F (12.4°C) and an average high of 70.5°F (21.4°C). In San Rafael, California, the average high-temperature is essentially the same as in June - a still agreeable 70.5°F (21.4°C). Weather in July »

Weather in August

The last month of the summer, August, is also an agreeable month in San Rafael, California, with average temperature varying between 55.4°F (13°C) and 71.2°F (21.8°C). In San Rafael, the average high-temperature is almost the same as in July - a still agreeable 71.2°F (21.8°C). Weather in August »

Weather in September

September, the first month of the autumn, in San Rafael, is still a pleasant month, with temperature in the range of an average low of 56.1°F (13.4°C) and an average high of 72.3°F (22.4°C). The warmest month is September, with an average high-temperature of 72.3°F (22.4°C) and an average low-temperature of 56.1°F (13.4°C). Weather in September »

Weather in October

October, like September, is an agreeable autumn month in San Rafael, California, with average temperature ranging between max 68.9°F (20.5°C) and min 54.3°F (12.4°C). In October, the average high-temperature is almost the same as in September - a still pleasant 68.9°F (20.5°C). Weather in October »

Weather in November

The last month of the autumn, November, is another comfortable month in San Rafael, California, with average temperature fluctuating between 61.5°F (16.4°C) and 49.6°F (9.8°C). In November, the average high-temperature slightly decreases, from a pleasant 68.9°F (20.5°C) in October, to a comfortable 61.5°F (16.4°C). Weather in November »

Weather in December

December, the first month of the winter, in San Rafael, is still a mild month, with temperature in the range of an average high of 55.4°F (13°C) and an average low of 45.3°F (7.4°C). December is the coldest month, with an average high-temperature of 55.4°F (13°C) and an average low-temperature of 45.3°F (7.4°C). Weather in December »
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FAQ

How much does it rain in San Rafael?

Throughout the year, in San Rafael, there are 48 rainfall days, and 3.94" (100mm) of precipitation is accumulated.

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

Months with the lowest UV index are January, February, November and December, with an average maximum UV index of 3.

What is the wettest month in San Rafael?

February is the month with the most rainfall in San Rafael. Rain falls for 5.3 days and accumulates 0.87" (22mm) of precipitation.

What is the most humid month in San Rafael?

With an average relative humidity of 77%, March is the most humid month in San Rafael.

What is the month with the highest UV index in San Rafael?

Months with the highest UV index are April, June through September, with an average maximum UV index of 5.

What is the driest month in San Rafael?

June through September are months with the least rain when the rain falls for 1.2 days and typically aggregates up to 0.04" (1mm) of rain.

When are the longest days in San Rafael?

With an average of 14.8h of daylight, June has the longest days of the year.

What month has the most sunshine in San Rafael?

With an average of 11.2h of sunshine, July has the most sunshine of the year in San Rafael, California.

What is the warmest month in San Rafael?

With an average high-temperature of 72.3°F (22.4°C) and an average low-temperature of 56.1°F (13.4°C), September is the warmest month.

What is the least humid month in San Rafael?

With an average relative humidity of 68%, October is the least humid month in San Rafael, California.

What is the coldest month in San Rafael?

With an average high-temperature of 55.4°F (13°C) and an average low-temperature of 45.3°F (7.4°C), December is the coldest month in San Rafael.

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

The month with the shortest days in San Rafael, California, is December, with an average of 9.6h of daylight.

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

December has the least sunshine of the year in San Rafael, California, with an average of 5.5h of sunshine.

Average temperature
San Rafael, CA

Average temperature - San Rafael, CA

The warmest month (with the highest average high temperature) is September (72.3°F).
The month with the lowest average high temperature is December (55.4°F).

The month with the highest average low temperature is September (56.1°F).
The coldest month (with the lowest average low temperature) is December (45.3°F).

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Average pressure
San Rafael, CA

Average pressure - San Rafael, CA

The month with the highest atmospheric pressure is January (30.13").
Months with the lowest atmospheric pressure are June, August and September (29.92").

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Average wind speed
San Rafael, CA

Average wind speed - San Rafael, CA

The windiest month (with the highest average wind speed) is May (7.8mph).
The calmest months (with the lowest average wind speed) are October and November (5.5mph).

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Average rainfall
San Rafael, CA

Average rainfall - San Rafael, CA

The wettest month (with the highest rainfall) is February (0.87").
The driest months (with the least rainfall) are June, July, August and September (0.04").

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Average rainfall days
San Rafael, CA

Average rainfall days - San Rafael, CA

The month with the highest number of rainy days is March (8.8 days).
Months with the least rainy days are June and August (1.2 days).

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Average daylight / Average sunshine
San Rafael, CA

Average daylight / Average sunshine - San Rafael, CA

The month with the longest days is June (Average daylight: 14.8h).
The month with the shortest days is December (Average daylight: 9.6h).

The month with the most sunshine is July (Average sunshine: 11.2h).
The month with the least sunshine is December (Average sunshine: 5.5h).

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Average sunshine days
San Rafael, CA

Average sunshine days - San Rafael, CA

The month with the most sunshine days is June (26.4 days).
The month with the least sunshine days is March (20.7 days).

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Average UV index
San Rafael, CA

Average UV index - San Rafael, CA

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

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Average visibility
San Rafael, CA

Average visibility - San Rafael, 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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