TODAY MAY31
TEMPERATURE51
HUMIDITY100
PRESSURE
WIND COND.242 8
  • 8157Mon
  • 9260Tue
  • 9458Wed
  • 8855Thu
  • 7753Fri
daynightWeather update from LAS TRAMPAS at
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Walnut Creek 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 Walnut Creek for July is 71 degrees.
  • The lowest monthly average temperature in Walnut Creek for December is 47 degrees.
  • The most monthly precipitation in Walnut Creek occurs in January with 3.3 inches.
  • The air quality index in Walnut Creek is 14% better than the national average.
  • The pollution index in Walnut Creek is 170% worse than the national average.

Compare Walnut Creek, CA Weather To Other Cities

      vs

      Walnut Creek 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.
      IndexWalnut CreekCaliforniaNational
      Air quality index435550
      Pollution index13,698,50018,106,7265,066,862

      Walnut Creek 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

      Walnut Creek air quality information

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

      Average monthly Walnut Creek temperature with heat index

      Walnut Creek monthly precipitation with daily maximum

      Walnut Creek monthly snow depth with daily maximum

      Walnut Creek monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Alamo, CA16,0784314%
      Bay Point, CA23,1314314%
      Camino Tassajara, CA3,4564314%
      Clyde, CA7934314%
      Danville, CA43,7584314%
      Walnut Creek, CA67,5684314%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Eau Claire, WI67,654355610%
      Redondo Beach, CA67,6647448%
      Yorba Linda, CA67,3628570%
      Jackson, TN67,162335570%
      Bossier City, LA67,1524314%
      Walnut Creek, CA67,5684314%
      Source: The Walnut Creek, 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.