Monthly weather forecast and climate
Santa Rosa, CA

Set in a scenic valley, the Camarillo region of Santa Rosa, California, has great modern homes and is neared by scenic rugged mountain layouts
Set in a scenic valley, the Camarillo region of Santa Rosa, California, has great modern homes and is neared by scenic rugged mountain layouts

Weather in January

January, like December, is a moderate winter month in Santa Rosa, California, with average temperature ranging between max 57.2°F (14°C) and min 43.2°F (6.2°C). In January, the average high-temperature is essentially the same as in December - a still moderate 57.2°F (14°C). Weather in January »

Weather in February

February, the last month of the winter, in Santa Rosa, is another mild month, with temperature in the range of an average high of 58.8°F (14.9°C) and an average low of 42.8°F (6°C). In Santa Rosa, California, the average high-temperature is essentially the same as in January - a still mild 58.8°F (14.9°C). Weather in February »

Weather in March

March, the first month of the spring, in Santa Rosa, is still a mild month, with average temperature varying between 60.4°F (15.8°C) and 43.5°F (6.4°C). In March, the average high-temperature is relatively the same as in February - a still moderate 60.4°F (15.8°C). Weather in March »

Weather in April

April in Santa Rosa, California, is an enjoyable spring month, with average temperature ranging between max 64.9°F (18.3°C) and min 45.5°F (7.5°C). In April, the average high-temperature is relatively the same as in March - a comfortable 64.9°F (18.3°C). Weather in April »

Weather in May

May, the last month of the spring, in Santa Rosa, is an agreeable month, with average temperature varying between 69.1°F (20.6°C) and 48.6°F (9.2°C). In Santa Rosa, the average high-temperature is relatively the same as in April - a pleasant 69.1°F (20.6°C). Weather in May »

Weather in June

June, the first month of the summer, in Santa Rosa, is a warm month, with temperature in the range of an average high of 76.3°F (24.6°C) and an average low of 53.1°F (11.7°C). In June, the average high-temperature marginally rises, from a pleasant 69.1°F (20.6°C) in May, to a warm 76.3°F (24.6°C). Weather in June »

Weather in July

July, the same as June, is another warm summer month in Santa Rosa, California, with average temperature fluctuating between 79.3°F (26.3°C) and 54.1°F (12.3°C). In July, the average high-temperature is almost the same as in June - a still warm 79.3°F (26.3°C). Weather in July »

Weather in August

August, the last month of the summer, in Santa Rosa, is also a moderately hot month, with average temperature ranging between min 54.7°F (12.6°C) and max 79.7°F (26.5°C). With an average high-temperature of 79.7°F (26.5°C) and an average low-temperature of 54.7°F (12.6°C), August is the warmest month. Weather in August »

Weather in September

September, the first month of the autumn, in Santa Rosa, is still a warm month, with average temperature fluctuating between 79°F (26.1°C) and 54.7°F (12.6°C). In September, the average high-temperature is essentially the same as in August - a still moderately hot 79°F (26.1°C). Weather in September »

Weather in October

October, the same as September, in Santa Rosa, California, is another pleasant autumn month, with temperature in the range of an average high of 72.3°F (22.4°C) and an average low of 51.8°F (11°C). In Santa Rosa, the average high-temperature marginally drops, from a warm 79°F (26.1°C) in September, to a pleasant 72.3°F (22.4°C). Weather in October »

Weather in November

November, the last month of the autumn, in Santa Rosa, is another comfortable month, with average temperature varying between 46°F (7.8°C) and 63.1°F (17.3°C). In November, the average high-temperature decreases, from a pleasant 72.3°F (22.4°C) in October, to a comfortable 63.1°F (17.3°C). Weather in November »

Weather in December

The first month of the winter, December, is also a moderate month in Santa Rosa, California, with average temperature fluctuating between 41.9°F (5.5°C) and 55.6°F (13.1°C). December is the coldest month, with an average high-temperature of 55.6°F (13.1°C) and an average low-temperature of 41.9°F (5.5°C). Weather in December »
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FAQ

How many days does it rain in Santa Rosa?

In Santa Rosa, California, during the entire year, the rain falls for 72.8 days and collects up to 12.01" (305mm) of precipitation.

What are the months with the lowest UV index in Santa Rosa?

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

What is the rainiest month in Santa Rosa?

February is the month with the most rainfall in Santa Rosa, California. Rain falls for 9.1 days and accumulates 2.64" (67mm) of precipitation.

What is the most humid month in Santa Rosa?

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

When are the longest days in Santa Rosa?

With an average of 14.8h of daylight, June has the longest days of the year in Santa Rosa, California.

What is the month with the highest UV index in Santa Rosa?

June is the month with the highest UV index, with an average maximum UV index of 6.

What is the driest month in Santa Rosa?

July and August are months with the least rain in Santa Rosa when the rain falls for 1.5 days and typically aggregates up to 0.04" (1mm) of rain.

What month has the most sunshine in Santa Rosa?

The month with the most sunshine is July, with an average of 11.9h of sunshine.

What is the warmest month in Santa Rosa?

The warmest month is August, with an average high-temperature of 79.7°F (26.5°C) and an average low-temperature of 54.7°F (12.6°C).

What is the least humid month in Santa Rosa?

With an average relative humidity of 63%, September is the least humid month in Santa Rosa.

What is the coldest month in Santa Rosa?

December is the coldest month in Santa Rosa, with an average high-temperature of 55.6°F (13.1°C) and an average low-temperature of 41.9°F (5.5°C).

What is the month with the shortest days in Santa Rosa?

The month with the shortest days in Santa Rosa, California, is December, with an average of 9.5h of daylight.

What is the month with the least sunshine in Santa Rosa?

The month with the least sunshine in Santa Rosa, California, is December, with an average of 5.7h of sunshine.

Average temperature
Santa Rosa, CA

Average temperature - Santa Rosa, CA

The warmest month (with the highest average high temperature) is August (79.7°F).
The month with the lowest average high temperature is December (55.6°F).

Months with the highest average low temperature are August and September (54.7°F).
The coldest month (with the lowest average low temperature) is December (41.9°F).

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Average pressure
Santa Rosa, CA

Average pressure - Santa Rosa, 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
Santa Rosa, CA

Average wind speed - Santa Rosa, CA

The windiest month (with the highest average wind speed) is May (7.1mph).
The calmest month (with the lowest average wind speed) is November (4.9mph).

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Average rainfall
Santa Rosa, CA

Average rainfall - Santa Rosa, CA

The wettest month (with the highest rainfall) is February (2.64").
The driest months (with the least rainfall) are July and August (0.04").

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Average rainfall days
Santa Rosa, CA

Average rainfall days - Santa Rosa, CA

The month with the highest number of rainy days is March (12.6 days).
The month with the least rainy days is August (0.8 days).

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Average daylight / Average sunshine
Santa Rosa, CA

Average daylight / Average sunshine - Santa Rosa, 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: 11.9h).
The month with the least sunshine is December (Average sunshine: 5.7h).

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Average sunshine days
Santa Rosa, CA

Average sunshine days - Santa Rosa, CA

The month with the most sunshine days is July (27.2 days).
The month with the least sunshine days is March (17.1 days).

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Average visibility
Santa Rosa, CA

Average visibility - Santa Rosa, 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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