Rancho Cucamonga, CA Weather - Forecast & Monthly Averages

TEMPERATURE	50
HUMIDITY	63
PRESSURE	102000
WIND COND.

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Weather Quick Facts

The highest monthly average temperature in Rancho Cucamonga for August is 77.8 degrees
The lowest monthly average temperature in Rancho Cucamonga for December is 54.5 degrees
The most monthly precipitation in Rancho Cucamonga occurs in December with 2.6 inches
The air quality index in Rancho Cucamonga is 111% worse than the national average
The pollution index in Rancho Cucamonga is 736% worse than the national average

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Rancho Cucamonga 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	44°F	69°F	56°F	2.3"
February	45°F	70°F	57°F	2.0"
March	48°F	74°F	60°F	1.2"
April	51°F	77°F	62°F	0.7"
May	55°F	81°F	66°F	0.4"
June	60°F	88°F	72°F	0.0"
July	65°F	94°F	77°F	0.1"
August	65°F	95°F	78°F	0.0"
September	64°F	93°F	76°F	0.2"
October	57°F	84°F	69°F	0.4"
November	49°F	77°F	62°F	0.6"
December	43°F	68°F	55°F	2.6"

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Rancho Cucamonga 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	Rancho Cucamonga	California	National
Air quality index	89	55	42
Pollution index	22,790,900	10,473,190	2,726,193

Rancho Cucamonga air quality

Measurement	Total
Days measured	365
Days with good air quality	42
Days with moderate air quality	178
Days w/ poor A.Q. for sensitive groups	79
Days with unhealthy air quality	58

Air quality details

Pollutant	Total
Arsenic	0.060%
Benzene	0.190%
Carbon Tetrachloride	0.010%
Lead	0.220%
Mercury	0.230%

Average monthly Rancho Cucamonga temperature with heat index

Rancho Cucamonga monthly precipitation with daily maximum

Rancho Cucamonga monthly snow depth with daily maximum

Rancho Cucamonga monthly wind speed information

Nearby cities with good air quality

City	Population	Air Quality Index	National Avg.
Charter Oak, CA	9,963	89	78.0%
Claremont, CA	35,610	89	78.0%
Montclair, CA	40,041	89	78.0%
San Dimas, CA	33,812	89	78.0%
Lytle Creek, CA	656	89	78.0%
Rancho Cucamonga, CA	178,060	89	78.0%

Cities with similar population

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

Source: The Rancho Cucamonga, 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.