TODAY DEC06
TEMPERATURE
HUMIDITY
PRESSURE
WIND COND.
  • 6248Sat100%80%
  • 5942Sun50%
  • 5840Mon
  • 5640Tue
  • 5839Wed
daynightWeather update from BLACK DIAMOND at
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Clayton 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
January39°F58°F48°F3.3"
February43°F62°F52°F3.0"
March45°F67°F54°F1.8"
April47°F71°F57°F1.9"
May52°F78°F63°F0.6"
June56°F85°F68°F0.0"
July58°F90°F71°F0.0"
August57°F90°F70°F0.0"
September56°F86°F68°F0.0"
October50°F77°F62°F1.4"
November45°F68°F55°F1.2"
December40°F57°F47°F2.3"

Did you know?

  • The highest monthly average temperature in Clayton for July is 71 degrees.
  • The lowest monthly average temperature in Clayton for December is 47 degrees.
  • The most monthly precipitation in Clayton occurs in January with 3.3 inches.
  • The air quality index in Clayton is 14% better than the national average.
  • The pollution index in Clayton is 170% worse than the national average.

Compare Clayton, CA Weather To Other Cities

Clayton 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.
IndexClaytonCaliforniaNational
Air quality index435550
Pollution index13,698,50018,106,7265,066,862

Clayton air quality information

MeasurementTotal
Days measured365
Days with good air quality241
Days with moderate air quality115
Days w/ poor A.Q. for sensitive groups9
Days with unhealthy air quality

Clayton air quality information

PollutantTotal
Arsenic0.040%
Benzene0.110%
Carbon Tetrachloride0.330%
Lead0.070%
Mercury0.120%

Average monthly Clayton temperature with heat index

Clayton monthly precipitation with daily maximum

Clayton monthly snow depth with daily maximum

Clayton monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Concord, CA126,9384314%
Lafayette, CA25,3814314%
North Gate, CA4654314%
Pittsburg, CA67,9984314%
San Miguel, CA3,2144314%
Clayton, CA11,6554314%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Cypress Lake, FL11,6563334%
Magnolia, AR11,651492%
Los Alamitos, CA11,6617448%
Red Oak, TX11,663548%
Endwell, NY11,640285470%
Clayton, CA11,6554314%
Source: The Clayton, 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.
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