TODAY NOV24
TEMPERATURE56
HUMIDITY90
PRESSURE101860
WIND COND.
  • 6952Mon20%30%
  • 6453Tue40%40%
  • 6648Wed30%
  • 7249
  • 7250Fri
daynightWeather update from Riverside Municipal Airport at
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Weather Quick Facts

  • The highest monthly average temperature in Grand for August is 77.8 degrees
  • The lowest monthly average temperature in Grand for December is 55.1 degrees
  • The most monthly precipitation in Grand occurs in December with 1.9 inches
  • The air quality index in Grand is 111% worse than the national average
  • The pollution index in Grand is 736% worse than the national average

Compare Riverside, CA Weather

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      Grand 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"

      Grand 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.
      IndexGrandRiversideCalifornia
      Air quality index898955
      Pollution index22,790,90022,790,90010,473,190

      Grand air quality

      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

      Air quality details

      PollutantTotal
      Arsenic0.060%
      Benzene0.190%
      Carbon Tetrachloride0.010%
      Lead0.220%
      Mercury0.230%

      Average monthly Grand temperature with heat index

      Grand monthly precipitation with daily maximum

      Grand monthly snow depth with daily maximum

      Grand monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Norco, CA27,0218978.0%
      Good Hope, CA8,4318978.0%
      El Sobrante, CA14,7798978.0%
      Mead Valley, CA20,8178978.0%
      Highland, CA55,3398978.0%
      Riverside, CA327,5698978.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Corpus Christi, TX326,3324216.0%
      Santa Ana, CA332,6108978.0%
      Lexington-Fayette, KY322,2004216.0%
      Vaughan, ON321,974n/a 
      Stockton, CA311,1034510.0%
      Riverside, CA327,5698978.0%
      Source: The Grand, Riverside, 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.