TODAY AUG15
TEMPERATURE95
HUMIDITY27
PRESSURE29.87
WIND COND.240 9.2
  • 9468Thu
  • 9568Fri
  • 9567Sat
  • 9667Sun
  • 9769Mon
daynightWeather update from San Bernardino Intl. Airport at

Grand Terrace Average Weather

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"

Did you know?

  • The highest monthly average temperature in Grand Terrace for August is 78 degrees.
  • The lowest monthly average temperature in Grand Terrace for December is 55 degrees.
  • The most monthly precipitation in Grand Terrace occurs in December with 1.9 inches.
  • The air quality index in Grand Terrace is 70% worse than the national average.
  • The pollution index in Grand Terrace is 523% worse than the national average.

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Compare Grand Terrace, CA Weather To Other Cities

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 index855550
Pollution index31,575,30018,106,7265,066,862

Grand Terrace air quality information

MeasurementTotal
Days measured365
Days with good air quality24
Days with moderate air quality211
Days w/ poor A.Q. for sensitive groups102
Days with unhealthy air quality25

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.
Colton, CA53,8568570%
El Sobrante, CA15,3748570%
Home Gardens, CA11,3838570%
Loma Linda, CA23,8598570%
Moreno Valley, CA202,0618570%
Grand Terrace, CA12,3938570%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Waxhaw, NC12,3984216%
Irondale, AL12,38850= 100
Ringwood, NJ12,398536%
California, MD12,3863726%
Abbeville, LA12,4084412%
Grand Terrace, CA12,3938570%
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.