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Key findings

  • The highest monthly average temperature in Curtis for August is 78 degrees
  • The lowest monthly average temperature in Curtis for December is 55 degrees
  • The most monthly precipitation in Curtis occurs in December with 1.9 inches
  • The air quality index in Curtis is 79% worse than the national average
  • The pollution index in Curtis is 523% worse than the national average

Compare San Bernardino, CA Weather

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      Curtis 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°F70°F56°F1.6"
      February45°F72°F57°F1.2"
      March47°F75°F60°F0.7"
      April50°F78°F63°F0.5"
      May55°F82°F66°F0.2"
      June59°F89°F72°F0.0"
      July65°F94°F77°F0.2"
      August65°F95°F78°F0.1"
      September63°F94°F76°F0.2"
      October56°F85°F69°F0.2"
      November49°F77°F62°F0.5"
      December44°F69°F55°F1.9"

      Curtis 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.
      IndexCurtisSan BernardinoCalifornia
      Air quality index898955
      Pollution index31,575,30031,575,30018,106,726

      Curtis air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality42
      Days with moderate air quality178
      Days w/ poor A.Q. for sensitive groups79
      Days with unhealthy air quality58

      Curtis air quality information

      PollutantTotal
      Arsenic0.110%
      Benzene0.260%
      Carbon Tetrachloride0.020%
      Lead0.350%
      Mercury0.280%

      Average monthly Curtis temperature with heat index

      Curtis monthly precipitation with daily maximum

      Curtis monthly snow depth with daily maximum

      Curtis monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Calimesa, CA8,3798978%
      Grand Terrace, CA12,3938978%
      Lake Arrowhead, CA11,3078978%
      Moreno Valley, CA202,0618978%
      Riverside, CA318,6788978%
      San Bernardino, CA214,5818978%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Des Moines, IA212,8593922%
      Birmingham, AL212,424536%
      Richmond, VA216,7734412%
      Spokane, WA212,0784314%
      Boise, ID218,6773628%
      San Bernardino, CA214,5818978%
      Source: The Curtis, San Bernardino, 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.