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| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 48°F | 70°F | 58°F | 3.5" |
| February | 50°F | 70°F | 59°F | 2.9" |
| March | 52°F | 72°F | 61°F | 1.5" |
| April | 55°F | 74°F | 63°F | 0.7" |
| May | 58°F | 75°F | 65°F | 0.5" |
| June | 61°F | 78°F | 68°F | 0.0" |
| July | 65°F | 83°F | 72°F | 0.0" |
| August | 65°F | 84°F | 73°F | 0.0" |
| September | 64°F | 85°F | 72°F | 0.3" |
| October | 60°F | 81°F | 69°F | 0.7" |
| November | 54°F | 75°F | 63°F | 0.8" |
| December | 48°F | 69°F | 57°F | 2.8" |
| Index | Watts | Los Angeles | California |
| Air quality index | 72 | 72 | 55 |
| Pollution index | 139,490,000 | 139,490,000 | 10,473,190 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 66 |
| Days with moderate air quality | 208 |
| Days w/ poor A.Q. for sensitive groups | 62 |
| Days with unhealthy air quality | 28 |
| Pollutant | Total |
| Arsenic | 0.200% |
| Benzene | 0.950% |
| Carbon Tetrachloride | 0.080% |
| Lead | 1.320% |
| Mercury | 0.440% |
| City | Population | Air Quality Index | National Avg. |
| Florence-Graham, CA | 64,787 | 72 | 44.0% |
| Westmont, CA | 35,188 | 72 | 44.0% |
| Bell Gardens, CA | 41,770 | 72 | 44.0% |
| Downey, CA | 111,263 | 72 | 44.0% |
| La Palma, CA | 15,657 | 72 | 44.0% |
| Los Angeles, CA | 3,973,278 | 72 | 44.0% |
| City | Population | Air Quality Index | National Avg. |
| Toronto, ON | 3,013,752 | n/a | |
| Chicago, IL | 2,699,347 | 55 | 10.0% |
| Houston, TX | 2,313,238 | 52 | 4.0% |
| Montréal, QC | 1,811,008 | n/a | |
| Phoenix, AZ | 1,658,422 | 74 | 48.0% |
| Los Angeles, CA | 3,973,278 | 72 | 44.0% |
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