Santa Rosa, CA Weather - Forecast & Monthly Averages

TEMPERATURE	59
HUMIDITY	96
PRESSURE	101390
WIND COND.

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Weather Quick Facts

The highest monthly average temperature in Santa Rosa for July is 64.9 degrees
The lowest monthly average temperature in Santa Rosa for December is 46.1 degrees
The most monthly precipitation in Santa Rosa occurs in December with 6.9 inches
The air quality index in Santa Rosa is 19% better than the national average
The pollution index in Santa Rosa is 190% worse than the national average

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Santa Rosa Average Temperature

In the event that the weather data was unavailable for this city, estimates based upon nearby cities were used.
Month	Temp. _(min)	Temp. _(max)	Temp. _(avg)	Precipitation
January	36°F	60°F	46°F	6.0"
February	39°F	64°F	50°F	5.7"
March	41°F	67°F	52°F	4.6"
April	43°F	71°F	55°F	2.4"
May	46°F	77°F	60°F	1.1"
June	50°F	83°F	64°F	0.4"
July	52°F	85°F	65°F	0.0"
August	52°F	84°F	64°F	0.0"
September	49°F	85°F	64°F	0.2"
October	46°F	78°F	59°F	2.0"
November	41°F	67°F	52°F	3.2"
December	36°F	59°F	46°F	6.9"

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Santa Rosa air quality index & pollution index

In the event that the air quality/pollution data was unavailable for this city, estimates based upon nearby cities were used.
Index	Santa Rosa	California	National
Air quality index	34	55	42
Pollution index	7,898,290	10,473,190	2,726,193

Santa Rosa air quality

Measurement	Total
Days measured	365
Days with good air quality	346
Days with moderate air quality	18
Days w/ poor A.Q. for sensitive groups	0
Days with unhealthy air quality	1

Air quality details

Pollutant	Total
Arsenic	0.260%
Benzene	0.080%
Carbon Tetrachloride	0.005%
Lead	0.240%
Mercury	0.270%

Average monthly Santa Rosa temperature with heat index

Santa Rosa monthly precipitation with daily maximum

Santa Rosa monthly snow depth with daily maximum

Santa Rosa monthly wind speed information

Nearby cities with good air quality

City	Population	Air Quality Index	National Avg.
Glen Ellen, CA	1,214	34	32.0%
Petaluma, CA	60,865	34	32.0%
Dillon Beach, CA	309	34	32.0%
Occidental, CA	876	34	32.0%
Windsor, CA	27,635	34	32.0%
Santa Rosa, CA	178,391	34	32.0%

Cities with similar population

City	Population	Air Quality Index	National Avg.
Ontario, CA	178,194	89	78.0%
Rancho Cucamonga, CA	178,060	89	78.0%
Providence, RI	179,472	44	12.0%
Newport News, VA	179,582	40	20.0%
Oshawa, ON	176,009	n/a
Santa Rosa, CA	178,391	34	32.0%

Source: The Santa Rosa, CA weather data displayed above is derived from the NOAA (National Oceanic and Atmospheric). Air quality and pollution data is derived from the EPA (United States Environmental Protection Agency). Air quality and pollution levels measured in a particular area may not be representative of the entire county.