August 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 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).

Temperature

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).

Humidity

The average relative humidity in August in Santa Rosa is 67%.

Rainfall

July and August are months with the least rain in Santa Rosa when the rain falls for 0.8 days and typically aggregates up to 0.04" (1mm) of rain.

Daylight

The average length of the day in August in Santa Rosa is 13h and 37min.
On the first day of the month, sunrise is at 6:13 am and sunset at 8:21 pm. On the last day of August, sunrise is at 6:39 am and sunset at 7:42 pm PDT.

Sunshine

The average sunshine in August is 11.8h.

UV index

In Santa Rosa, the average daily maximum UV index in August is 5. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for average individuals.
Note: In August, the average maximum UV index of 5 translate into the following recommendations:
Take precautions - Protection against sunburn is recommended. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the warmest month in Santa Rosa?

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).

What is the temperature in August in Santa Rosa?

In August, in Santa Rosa, California, the average high-temperature is 79.7°F (26.5°C), and the average low-temperature is 54.7°F (12.6°C).

What is the average humidity in August in Santa Rosa?

In August, the average relative humidity in Santa Rosa, California, is 67%.

What is the driest month in Santa Rosa?

July and August are months with the least rain in Santa Rosa, California, when the rain falls for 0.8 days and typically aggregates up to 0.04" (1mm) of rain.

How many days does it rain in August in Santa Rosa?

In Santa Rosa, California, in August, during 0.8 rainfall days, 0.04" (1mm) of precipitation is typically accumulated.

How many hours of daylight does Santa Rosa have in August?

In Santa Rosa, the average day length in August is 13h and 37min.

When are sunrise and sunset in August in Santa Rosa?

In August, on the first day of the month, sunrise is at 6:13 am and sunset at 8:21 pm. On the last day of the month, in Santa Rosa, California, sunrise is at 6:39 am and sunset at 7:42 pm PDT.

How long on average sun shines in August in Santa Rosa?

In August, the average sunshine duration in Santa Rosa is 11.8h.

How high is the UV index in August in Santa Rosa?

In August, the average daily maximum UV index in Santa Rosa, California, is 5. A UV Index of 3 to 5 symbolizes a medium health risk from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in August
Santa Rosa, CA

Average temperature in August - Santa Rosa, CA
  • Average high temperature in August: 79.7°F

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).

  • Average low temperature in August: 54.7°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 in August
Santa Rosa, CA

Average pressure in August - Santa Rosa, CA
  • Average pressure in August: 29.92"Hg

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 in August
Santa Rosa, CA

Average wind speed in August - Santa Rosa, CA
  • Average wind speed in August: 5.2mph

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 humidity in August
Santa Rosa, CA

Average humidity in August - Santa Rosa, CA
  • Average humidity in August: 67%

The month with the highest relative humidity is March (77%).
The month with the lowest relative humidity is September (63%).

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Average rainfall in August
Santa Rosa, CA

Average rainfall in August - Santa Rosa, CA
  • Average rainfall in August: 0.04"

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 in August
Santa Rosa, CA

Average rainfall days in August - Santa Rosa, CA
  • Average rainfall days in August: 0.8 days

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 in August /
Average sunshine in August
Santa Rosa, CA

Average daylight in August / Average sunshine in August - Santa Rosa, CA
  • Average daylight in August: 13h and 37min

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).

  • Average sunshine in August: 11h and 48min

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 in August
Santa Rosa, CA

Average sunshine days in August - Santa Rosa, CA
  • Average sunshine days in August: 27.1 days

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 in August
Santa Rosa, CA

Average UV index in August - Santa Rosa, CA
  • Average UV index in August: 5

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 cloud cover in August
Santa Rosa, CA

Average cloud cover in August - Santa Rosa, CA
  • Average cloud cover in August: 10

The month with the most cloud cover is March (Cloud cover 39).
The month with the least cloud cover is July (Cloud cover 9).

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Average visibility in August
Santa Rosa, CA

Average visibility in August - Santa Rosa, CA
  • Average visibility in August: 6mi

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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