TODAY MAY13
TEMPERATURE72
HUMIDITY53
PRESSURE30.03
WIND COND. 14.8
  • 8457Thu
  • 8155Fri
  • 7653Sat20%
  • 7254Sun
  • 7755Mon
daynightWeather update from San Bernardino Intl. Airport at

Key findings

  • The highest monthly average temperature in Grand Terrace for August is 77.8 degrees
  • The lowest monthly average temperature in Grand Terrace for December is 55.1 degrees
  • The most monthly precipitation in Grand Terrace occurs in December with 1.9 inches
  • The air quality index in Grand Terrace is 79% worse than the national average
  • The pollution index in Grand Terrace is 523% worse than the national average

Compare Grand Terrace, CA Weather

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      Grand Terrace 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 Terrace 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.
      IndexGrand TerraceCaliforniaNational
      Air quality index895550
      Pollution index31,575,30018,106,7265,066,862

      Grand Terrace 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

      Grand Terrace air quality information

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

      Average monthly Grand Terrace temperature with heat index

      Grand Terrace monthly precipitation with daily maximum

      Grand Terrace monthly snow depth with daily maximum

      Grand Terrace monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Calimesa, CA8,3798978%
      Loma Linda, CA23,8598978%
      Riverside, CA318,6788978%
      El Sobrante CDP (Contra Costa County), CA12,9638978%
      Lakeview, CA2,1498978%
      Grand Terrace, CA12,3938978%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Waxhaw, NC12,398492%
      Ringwood, NJ12,398512%
      Irondale, AL12,388536%
      California, MD12,3864118%
      Abbeville, LA12,4084118%
      Grand Terrace, CA12,3938978%
      Source: The Grand Terrace, 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.