TODAY NOV21
TEMPERATURE56
HUMIDITY84
PRESSURE30.08
WIND COND.320 3.4
  • 7052Wed30%80%
  • 644850%
  • 6650Fri
  • 6850Sat
  • 7450Sun
daynightWeather update from Ontario, Ontario International Airport at

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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.
MonthTemp. (min)Temp. (max)Temp. (avg)Precipitation
January44°F69°F56°F2.3"
February45°F70°F57°F2.0"
March48°F74°F60°F1.2"
April51°F77°F62°F0.7"
May55°F81°F66°F0.4"
June60°F88°F72°F0.0"
July65°F94°F77°F0.1"
August65°F95°F78°F0.0"
September64°F93°F76°F0.2"
October57°F84°F69°F0.4"
November49°F77°F62°F0.6"
December43°F68°F55°F2.6"

Did you know?

  • The highest monthly average temperature in Rancho Cucamonga for August is 78 degrees.
  • The lowest monthly average temperature in Rancho Cucamonga for December is 55 degrees.
  • The most monthly precipitation in Rancho Cucamonga occurs in December with 2.6 inches.
  • The air quality index in Rancho Cucamonga is 70% worse than the national average.
  • The pollution index in Rancho Cucamonga is 349% worse than the national average.

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Compare Rancho Cucamonga, CA Weather To Other Cities

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.
IndexRancho CucamongaCaliforniaNational
Air quality index855550
Pollution index22,790,90018,106,7265,066,862

Rancho Cucamonga air quality information

MeasurementTotal
Days measured365
Days with good air quality24
Days with moderate air quality211
Days w/ poor A.Q. for sensitive groups102
Days with unhealthy air quality25

Rancho Cucamonga air quality information

PollutantTotal
Arsenic0.060%
Benzene0.190%
Carbon Tetrachloride0.010%
Lead0.220%
Mercury0.230%

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, StatePopulationAir Quality IndexNational Avg.
Chino Hills, CA77,2668570%
Fontana, CA205,2288570%
Lytle Creek, CA1,0198570%
Ontario, CA169,3898570%
San Antonio Heights, CA3,0998570%
Rancho Cucamonga, CA173,3098570%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Santa Rosa, CA173,1653530%
Oceanside, CA173,8296122%
Jackson, MS172,0394216%
Garden Grove, CA174,6767448%
Tempe, AZ174,7087448%
Rancho Cucamonga, CA173,3098570%
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.