Climate and monthly weather forecast
Sonoma, CA

Neat rows of vines in a vineyard farm in Sonoma, California
Neat rows of vines in a vineyard farm in Sonoma, California

Weather in January

January in Sonoma, California, is a mild winter month, with an average temperature varying between 42.1°F (5.6°C) and 56.3°F (13.5°C). In Sonoma, California, the average high-temperature in January is essentially the same as in December - a moderate 56.3°F (13.5°C). Weather in January »

Weather in February

February, the last month of the winter in Sonoma, is also a moderate month, with an average temperature varying between 42.1°F (5.6°C) and 59°F (15°C). In February, the average high-temperature is almost the same as in January - a still mild 59°F (15°C). Weather in February »

Weather in March

March, the first month of the spring in Sonoma, is a comfortable month, with temperature in the range of an average high of 61.3°F (16.3°C) and an average low of 43°F (6.1°C). In March, the average high-temperature is almost the same as in February - an enjoyable 61.3°F (16.3°C). Weather in March »

Weather in April

April, the same as March, is another enjoyable spring month in Sonoma, California, with temperature in the range of an average high of 66.7°F (19.3°C) and an average low of 45°F (7.2°C). In April, the average high-temperature slightly increases from 61.3°F (16.3°C) in March to a still comfortable 66.7°F (19.3°C). Weather in April »

Weather in May

The last month of the spring, May, is an agreeable month in Sonoma, California, with temperature in the range of an average low of 48.4°F (9.1°C) and an average high of 71.2°F (21.8°C). In May, the average high-temperature is almost the same as in April - a pleasant 71.2°F (21.8°C). Weather in May »

Weather in June

June, the first month of the summer in Sonoma, is a warm month, with an average temperature ranging between min 53.1°F (11.7°C) and max 79.5°F (26.4°C). In Sonoma, the average high-temperature in June marginally rises from an agreeable 71.2°F (21.8°C) in May to a warm 79.5°F (26.4°C). Weather in June »

Weather in July

July, like June, in Sonoma, California, is another warm summer month, with temperature in the range of an average low of 54.1°F (12.3°C) and an average high of 82.8°F (28.2°C). In Sonoma, the average high-temperature in July is relatively the same as in June - a still warm 82.8°F (28.2°C). Weather in July »

Weather in August

August, the last month of the summer in Sonoma, is also a moderately hot month, with an average temperature ranging between min 54.9°F (12.7°C) and max 82.9°F (28.3°C). With an average high-temperature of 82.9°F (28.3°C) and an average low-temperature of 54.9°F (12.7°C), August is the warmest month. In August, the average heat index is estimated at a hot 86.7°F (30.4°C). Weather in August »

Weather in September

The first month of the autumn, September, is still a warm month in Sonoma, California, with an average temperature varying between 81.1°F (27.3°C) and 54.7°F (12.6°C). In September, the average high-temperature is practically the same as in August - a still moderately hot 81.1°F (27.3°C). Weather in September »

Weather in October

October, like September, is an agreeable autumn month in Sonoma, California, with an average temperature varying between 73.2°F (22.9°C) and 51.6°F (10.9°C). In October, the average high-temperature slightly decreases from a moderately hot 81.1°F (27.3°C) in September to a pleasant 73.2°F (22.9°C). Weather in October »

Weather in November

November, the last month of the autumn in Sonoma, is also an enjoyable month, with an average temperature ranging between max 63.3°F (17.4°C) and min 46°F (7.8°C). In November, the average high-temperature decreases from a pleasant 73.2°F (22.9°C) in October to an enjoyable 63.3°F (17.4°C). Weather in November »

Weather in December

December, the first month of the winter in Sonoma, is still a cool month, with an average temperature varying between 41.4°F (5.2°C) and 55°F (12.8°C). December is the coldest month, with an average high-temperature of 55°F (12.8°C) and an average low-temperature of 41.4°F (5.2°C). Weather in December »
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FAQ

How many days does it rain in Sonoma?

Throughout the year, there are 73.3 rainfall days, and 15.47" (393mm) of precipitation is accumulated.

What is the month with the lowest UV index in Sonoma?

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

What is the rainiest month in Sonoma?

February is the month with the most rainfall in Sonoma. Rain falls for 8.9 days and accumulates 3.43" (87mm) of precipitation.

What is the most humid month in Sonoma?

With an average relative humidity of 76%, March is the most humid month.

When is Daylight Saving Time (DST) in Sonoma?

On Sunday, March 13. 2022, at 2:00 am, Daylight Saving Time starts, 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 are the longest days in Sonoma?

The month with the longest days in Sonoma is June, with an average of 14h and 47min of daylight.

What are the months with the highest UV index in Sonoma?

June and July, with an average maximum UV index of 6, are months with the highest UV index in Sonoma.

What is the driest month in Sonoma?

July and August are months with the least rain when the rain falls for 1.3 days and typically aggregates up to 0.04" (1mm) of rain.

What month has the most sunshine in Sonoma?

The month with the most sunshine in Sonoma, California, is July, with an average of 12h of sunshine.

What is the warmest month in Sonoma?

The warmest month in Sonoma is August, with an average high-temperature of 82.9°F (28.3°C) and an average low-temperature of 54.9°F (12.7°C).

What is the least humid month in Sonoma?

With an average relative humidity of 59%, September is the least humid month.

What is the coldest month in Sonoma?

December is the coldest month in Sonoma, with an average high-temperature of 55°F (12.8°C) and an average low-temperature of 41.4°F (5.2°C).

What is the month with the shortest days in Sonoma?

With an average of 9h and 33min of daylight, December has the shortest days of the year in Sonoma.

What is the month with the least sunshine in Sonoma?

December has the least sunshine of the year in Sonoma, California, with an average of 5.6h of sunshine.

Average temperature
Sonoma, CA

Average temperature - Sonoma, CA

The warmest month (with the highest average high temperature) is August (82.9°F).
The month with the lowest average high temperature is December (55°F).

The month with the highest average low temperature is August (54.9°F).
The coldest month (with the lowest average low temperature) is December (41.4°F).

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Average pressure
Sonoma, CA

Average pressure - Sonoma, CA

The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

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Average wind speed
Sonoma, CA

Average wind speed - Sonoma, CA

The windiest month (with the highest average wind speed) is May (6.2mph).
The calmest month (with the lowest average wind speed) is November (4.4mph).

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Average rainfall
Sonoma, CA

Average rainfall - Sonoma, CA

The wettest month (with the highest rainfall) is February (3.43").
The driest months (with the least rainfall) are July and August (0.04").

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Average rainfall days
Sonoma, CA

Average rainfall days - Sonoma, CA

The month with the highest number of rainy days is March (13.4 days).
The month with the least rainy days is August (0.8 days).

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Average daylight / Average sunshine
Sonoma, CA

Average daylight / Average sunshine - Sonoma, CA

The month with the longest days is June (Average daylight: 14h and 47min).
The month with the shortest days is December (Average daylight: 9h and 33min).

The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 36min).

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Average sunshine days
Sonoma, CA

Average sunshine days - Sonoma, CA

The month with the most sunshine days is July (28.7 days).
The month with the least sunshine days is March (16.1 days).

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Average UV index
Sonoma, CA

Average UV index - Sonoma, CA

The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 3).

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Average visibility
Sonoma, CA

Average visibility - Sonoma, 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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