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Key findings

  • The highest monthly average temperature in Diablo Grande for July is 80.2 degrees
  • The lowest monthly average temperature in Diablo Grande for January is 46.9 degrees
  • The most monthly precipitation in Diablo Grande occurs in January with 2.4 inches
  • The air quality index in Diablo Grande is 1% better than the national average
  • The pollution index in Diablo Grande is 53% worse than the national average

Compare Diablo Grande, CA Weather

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      Diablo Grande 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
      January38°F58°F47°F2.4"
      February42°F64°F52°F1.9"
      March46°F70°F57°F1.7"
      April49°F76°F61°F1.3"
      May54°F85°F69°F0.4"
      June60°F93°F76°F0.2"
      July64°F98°F80°F0.0"
      August63°F96°F78°F0.0"
      September59°F91°F74°F0.1"
      October52°F80°F64°F0.7"
      November44°F68°F54°F1.1"
      December38°F58°F47°F2.3"

      Diablo Grande 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.
      IndexDiablo GrandeCaliforniaNational
      Air quality index495550
      Pollution index7,774,44018,106,7265,066,862

      Diablo Grande air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality201
      Days with moderate air quality141
      Days w/ poor A.Q. for sensitive groups22
      Days with unhealthy air quality1

      Diablo Grande air quality information

      PollutantTotal
      Arsenic0.030%
      Benzene0.090%
      Carbon Tetrachloride0.000%
      Lead0.050%
      Mercury0.040%

      Average monthly Diablo Grande temperature with heat index

      Diablo Grande monthly precipitation with daily maximum

      Diablo Grande monthly snow depth with daily maximum

      Diablo Grande monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Grayson, CA990492%
      Crows Landing, CA255492%
      Monterey Park Tract, CA338492%
      Patterson, CA21,205492%
      Riverdale Park, CA1,056492%
      Diablo Grande, CA1,079492%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Afton, NY1,0793432%
      Surrey, ND1,0793628%
      New Castle, KY1,079492%
      Lawtey, FL1,0793530%
      Forest Park, OK1,079484%
      Diablo Grande, CA1,079492%
      Source: The Diablo Grande, 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.