Monthly weather forecast and climate
Sonoma, CA

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

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

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

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

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

The first month of the summer, June, is a warm month in Sonoma, California, with average temperature fluctuating between 79.5°F (26.4°C) and 53.1°F (11.7°C). In June, the average high-temperature slightly increases, from an agreeable 71.2°F (21.8°C) in May, to a moderately hot 79.5°F (26.4°C). Weather in June »

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

The last month of the summer, August, is another warm month in Sonoma, California, with average temperature ranging between min 54.9°F (12.7°C) and max 82.9°F (28.3°C). The warmest month 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). In August, the average heat index is appraised at a hot 86.7°F (30.4°C). Weather in August »

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

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

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

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

How many days does it rain in Sonoma?

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

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

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

What is the wettest month in Sonoma?

The month with the most rainfall in Sonoma, California, is February when the rain falls for 8.9 days and typically aggregates up to 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 in Sonoma, California.

When are the longest days in Sonoma?

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

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

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

What is the driest month in Sonoma?

Months with the least rainfall in Sonoma are July and August Rain falls for 1.3 days and accumulates 0.04" (1mm) of rain.

What month has the most sunshine in Sonoma?

July has the most sunshine of the year in Sonoma, with an average of 12h of sunshine.

What is the warmest month in Sonoma?

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.

What is the least humid month in Sonoma?

September is the least humid month in Sonoma, with an average relative humidity of 59%.

What is the coldest month in Sonoma?

December is the coldest month in Sonoma, California, 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?

December has the shortest days of the year, with an average of 9.5h of daylight.

What is the month with the least sunshine in Sonoma?

December has the least sunshine of the year in Sonoma, with an average of 5.6h of sunshine.
Average temperature - Sonoma, CA
Average pressure - Sonoma, CA

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

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).

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").

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).

Average daylight / Average sunshine - Sonoma, CA

The month with the longest days is June (Average daylight: 14.8h).
The month with the shortest days is December (Average daylight: 9.5h).

The month with the most sunshine is July (Average sunshine: 12h).
The month with the least sunshine is December (Average sunshine: 5.6h).

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).

Average UV index - Sonoma, CA
Average visibility - Sonoma, 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).