TODAY JUL19
TEMPERATURE73
HUMIDITY73
PRESSURE29.94
WIND COND. 5.8
  • 8469Thu
  • 8568Fri
  • 8568Sat
  • 8669Sun
  • 8970Mon
daynightWeather update from Fullerton, Fullerton Municipal Airport at

Southwest 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
January28°F88°F55°F2.6"
February37°F90°F57°F2.4"
March36°F97°F59°F0.9"
April44°F102°F62°F0.7"
May50°F100°F66°F0.3"
June55°F102°F70°F0.0"
July58°F106°F74°F0.0"
August60°F104°F74°Fn/a
September55°F108°F71°F0.3"
October46°F100°F68°F0.2"
November39°F97°F63°F0.3"
December34°F82°F56°F0.5"

Did you know?

  • The highest monthly average temperature in Southwest for July is 74 degrees.
  • The lowest monthly average temperature in Southwest for January is 55 degrees.
  • The most monthly precipitation in Southwest occurs in January with 2.6 inches.
  • The air quality index in Southwest is 48% worse than the national average.
  • The pollution index in Southwest is 83% better than the national average.

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Compare Anaheim, CA Weather To Other Cities

Southwest 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.
IndexSouthwestAnaheimCalifornia
Air quality index748555
Pollution index858,652858,65218,106,726

Southwest 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

Southwest air quality information

PollutantTotal
Arsenic0.002%
Benzene0.010%
Carbon Tetrachloride0.000%
Lead0.020%
Mercury0.001%

Average monthly Southwest temperature with heat index

Southwest monthly precipitation with daily maximum

Southwest monthly snow depth with daily maximum

Southwest monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Bellflower, CA77,6877448%
Cerritos, CA49,7977448%
Cudahy, CA24,1067448%
East Rancho Dominguez, CA15,8877448%
Garden Grove, CA174,6767448%
Anaheim, CA346,7768570%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Honolulu, HI349,5973040%
Aurora, CO351,131548%
Santa Ana, CA333,6058570%
Tampa, FL361,4774314%
Bakersfield, CA367,5557958%
Anaheim, CA346,7768570%
Source: The Southwest, Anaheim, 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.