Climate and monthly weather forecast
San Anselmo, CA

Weather in January

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

Weather in February

The last month of the winter, February, is another mild month in San Anselmo, California, with an average temperature ranging between min 45.9°F (7.7°C) and max 57.9°F (14.4°C). In February, the average high-temperature is essentially 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 Anselmo, California, with an average temperature fluctuating between 59.4°F (15.2°C) and 46.9°F (8.3°C). In San Anselmo, the average high-temperature in March is essentially the same as in February - a still moderate 59.4°F (15.2°C). Weather in March »

Weather in April

April is a comfortable spring month in San Anselmo, California, with an average temperature fluctuating between 48.6°F (9.2°C) and 62.8°F (17.1°C). In San Anselmo, the average high-temperature in April is almost the same as in March - an enjoyable 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 Anselmo, California, with an average temperature ranging between max 64.9°F (18.3°C) and min 50.4°F (10.2°C). In San Anselmo, California, the average high-temperature in May is essentially the same as in April - a still comfortable 64.9°F (18.3°C). Weather in May »

Weather in June

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

Weather in July

July, the same as June, in San Anselmo, California, is another pleasant summer month, 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 Anselmo, the average high-temperature in July is essentially the same as in June - a still pleasant 70.5°F (21.4°C). Weather in July »

Weather in August

The last month of the summer, August, is another pleasant month in San Anselmo, California, with an average temperature ranging between max 71.2°F (21.8°C) and min 55.4°F (13°C). In August, the average high-temperature is practically the same as in July - a still agreeable 71.2°F (21.8°C). Weather in August »

Weather in September

The first month of the autumn, September, is still a pleasant month in San Anselmo, California, 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). September is the warmest month, 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 another pleasant autumn month in San Anselmo, California, with an average temperature ranging between min 54.3°F (12.4°C) and max 68.9°F (20.5°C). In October, the average high-temperature is practically 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 also an enjoyable month in San Anselmo, California, with temperature in the range of an average high of 61.5°F (16.4°C) and an average low of 49.6°F (9.8°C). In San Anselmo, the average high-temperature in November marginally drops from an agreeable 68.9°F (20.5°C) in October to an enjoyable 61.5°F (16.4°C). Weather in November »

Weather in December

The first month of the winter, December, is also a moderate month in San Anselmo, California, with an average temperature varying between 55.4°F (13°C) and 45.3°F (7.4°C). The coldest month is December, 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 many days does it rain in San Anselmo?

In San Anselmo, during the entire year, the rain falls for 48 days and collects up to 3.94" (100mm) of precipitation.

What is the month with the lowest UV index in San Anselmo?

January, February, November and December, with an average maximum UV index of 3, are months with the lowest UV index in San Anselmo, California.

What is the rainiest month in San Anselmo?

The month with the most rainfall is February, when the rain falls for 5.3 days and typically aggregates up to 0.87" (22mm) of precipitation.

What is the most humid month in San Anselmo?

The most humid month in San Anselmo is March, with an average relative humidity of 77%.

When is Daylight Saving Time (DST) in San Anselmo?

On Sunday, March 13. 2022, at 2:00 am, Daylight Saving Time starts in San Anselmo, and the time zone changes from PST to PDT. Daylight Saving Time ends Sunday, November 6. 2022, at 2:00 am, and the time zone reverts from PDT to PST.

When is the highest UV index in San Anselmo?

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

What is the driest month in San Anselmo?

June through September are months with the least rain in San Anselmo 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 Anselmo?

The month with the longest days in San Anselmo is June, with an average of 14h and 46min of daylight.

What month has the most sunshine in San Anselmo?

The month with the most sunshine in San Anselmo is July, with an average of 11.2h of sunshine.

What is the warmest month in San Anselmo?

The warmest month in San Anselmo 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).

What is the least humid month in San Anselmo?

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

What is the coldest month in San Anselmo?

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 Anselmo.

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

December has the shortest days of the year in San Anselmo, with an average of 9h and 35min of daylight.

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

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

Average temperature
San Anselmo, CA

Average temperature - San Anselmo, 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 Anselmo, CA

Average pressure - San Anselmo, CA

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

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Average wind speed
San Anselmo, CA

Average wind speed - San Anselmo, 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 Anselmo, CA

Average rainfall - San Anselmo, 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 Anselmo, CA

Average rainfall days - San Anselmo, CA

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

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Average daylight / Average sunshine
San Anselmo, CA

Average daylight / Average sunshine - San Anselmo, CA

The month with the longest days is June (Average daylight: 14h and 46min).
The month with the shortest days is December (Average daylight: 9h and 35min).

The month with the most sunshine is July (Average sunshine: 11h and 12min).
The month with the least sunshine is December (Average sunshine: 5h and 30min).

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Average sunshine days
San Anselmo, CA

Average sunshine days - San Anselmo, 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 Anselmo, CA

Average UV index - San Anselmo, CA

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

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Average visibility
San Anselmo, CA

Average visibility - San Anselmo, CA

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

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