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Key findings

  • The highest monthly average temperature in Riverside for July is 73 degrees
  • The lowest monthly average temperature in Riverside for December is 30 degrees
  • The most monthly precipitation in Riverside occurs in December with 2.4 inches
  • The air quality index in Riverside is 14% better than the national average
  • The pollution index in Riverside is 56% better than the national average

Compare Spokane, WA Weather

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      Riverside 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
      January25°F38°F31°F2.0"
      February28°F43°F34°F1.4"
      March32°F52°F41°F2.4"
      April36°F61°F47°F1.3"
      May43°F72°F57°F1.2"
      June50°F78°F64°F2.0"
      July57°F90°F73°F0.5"
      August55°F88°F71°F0.4"
      September47°F78°F61°F0.6"
      October39°F62°F49°F1.7"
      November32°F47°F39°F2.0"
      December25°F37°F30°F2.4"

      Riverside 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.
      IndexRiversideSpokaneWashington
      Air quality index434336
      Pollution index2,233,3502,233,3508,596,989

      Riverside air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality252
      Days with moderate air quality111
      Days w/ poor A.Q. for sensitive groups2
      Days with unhealthy air quality0

      Riverside air quality information

      PollutantTotal
      Arsenic0.002%
      Benzene0.030%
      Carbon Tetrachloride0.002%
      Lead0.003%
      Mercury0.001%

      Average monthly Riverside temperature with heat index

      Riverside monthly precipitation with daily maximum

      Riverside monthly snow depth with daily maximum

      Riverside monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Airway Heights, WA6,5234314%
      Medical Lake, WA4,9314314%
      Millwood, WA1,6554314%
      Cheney, WA11,4794314%
      Country Homes, WA5,7454314%
      Spokane, WA212,0784314%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Birmingham, AL212,424536%
      Des Moines, IA212,8593922%
      Rochester, NY210,2913726%
      San Bernardino, CA214,5818978%
      Modesto, CA208,512492%
      Spokane, WA212,0784314%
      Source: The Riverside, Spokane, WA 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.