Climate and monthly weather forecast
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 an average temperature varying between 57.2°F (14°C) and 43.2°F (6.2°C). In Santa Rosa, the average high-temperature in January is relatively 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 an average temperature ranging between max 58.8°F (14.9°C) and min 42.8°F (6°C). In Santa Rosa, California, the average high-temperature in February is essentially the same as in January - a still moderate 58.8°F (14.9°C). Weather in February »

Weather in March

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

Weather in April

April in Santa Rosa, California, is an enjoyable spring month, with an average temperature fluctuating between 64.9°F (18.3°C) and 45.5°F (7.5°C). In Santa Rosa, the average high-temperature in April is practically the same as in March - an enjoyable 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 an average temperature varying between 69.1°F (20.6°C) and 48.6°F (9.2°C). In May, the average high-temperature is relatively the same as in April - an agreeable 69.1°F (20.6°C). Weather in May »

Weather in June

The first month of the summer, June, is a moderately hot month in Santa Rosa, California, with an average temperature fluctuating between 76.3°F (24.6°C) and 53.1°F (11.7°C). In June, the average high-temperature slightly increases 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, like June, in Santa Rosa, California, is a moderately hot summer month, with an average temperature varying 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 moderately hot 79.3°F (26.3°C). Weather in July »

Weather in August

The last month of the summer, August, is another warm month in Santa Rosa, California, with an average temperature varying between 54.7°F (12.6°C) and 79.7°F (26.5°C). August is the warmest month, with an average high-temperature of 79.7°F (26.5°C) and an average low-temperature of 54.7°F (12.6°C). Weather in August »

Weather in September

The first month of the autumn, September, is also a moderately hot month in Santa Rosa, California, with an average temperature ranging between max 79°F (26.1°C) and min 54.7°F (12.6°C). In September, the average high-temperature is relatively 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 an agreeable autumn month, with an average temperature fluctuating between 72.3°F (22.4°C) and 51.8°F (11°C). In Santa Rosa, California, the average high-temperature in October marginally drops from a warm 79°F (26.1°C) in September to an agreeable 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 an average temperature varying between 63.1°F (17.3°C) and 46°F (7.8°C). In November, the average high-temperature drops from an agreeable 72.3°F (22.4°C) in October to an enjoyable 63.1°F (17.3°C). Weather in November »

Weather in December

The first month of the winter, December, is still a mild month in Santa Rosa, California, with an average temperature varying between 41.9°F (5.5°C) and 55.6°F (13.1°C). The coldest month is December, 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 much does it rain in Santa Rosa?

Throughout the year, there are 72.8 rainfall days, and 12.01" (305mm) of precipitation is accumulated.

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

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

What is the wettest 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?

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

When is Daylight Saving Time (DST) in Santa Rosa?

On Sunday, March 13. 2022, at 2:00 am, Daylight Saving Time starts in Santa Rosa, California, 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 Santa Rosa?

June has the longest days of the year in Santa Rosa, California, with an average of 14h and 48min of daylight.

When is the highest UV index in Santa Rosa?

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

What is the driest month in Santa Rosa?

The months with the least rainfall in Santa Rosa, California, are July and August Rain falls for 1.5 days and accumulates 0.04" (1mm) of rain.

What month has the most sunshine in Santa Rosa?

July has the most sunshine of the year, with an average of 11.9h of sunshine.

What is the warmest month in Santa Rosa?

August is the warmest month in Santa Rosa, California, 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?

September is the least humid month, with an average relative humidity of 63%.

What 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), December is the coldest month in Santa Rosa.

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

The month with the shortest days is December, with an average of 9h and 32min of daylight.

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

December has the least sunshine of the year, 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).

The 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"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.92"Hg).

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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: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 32min).

The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).

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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 UV index
Santa Rosa, CA

Average UV index - Santa Rosa, CA

The month with the highest UV index is June (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
Santa Rosa, CA

Average visibility - Santa Rosa, 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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