| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 46°F | 70°F | 57°F | 2.6" |
| February | 48°F | 70°F | 58°F | 2.5" |
| March | 51°F | 72°F | 60°F | 1.0" |
| April | 53°F | 74°F | 62°F | 0.6" |
| May | 57°F | 75°F | 65°F | 0.3" |
| June | 61°F | 78°F | 67°F | 0.0" |
| July | 65°F | 83°F | 71°F | 0.2" |
| August | 65°F | 85°F | 72°F | 0.0" |
| September | 63°F | 85°F | 72°F | 0.3" |
| October | 59°F | 81°F | 68°F | 0.5" |
| November | 52°F | 76°F | 62°F | 0.7" |
| December | 46°F | 69°F | 56°F | 2.7" |
| Index | Carson | California | National |
| Air quality index | 72 | 55 | 42 |
| Pollution index | 4,251,410 | 10,473,190 | 2,726,193 |
| 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 | 0.010% |
| Benzene | 0.100% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.010% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| West Athens, CA | 9,554 | 72 | 44.0% |
| Bellflower, CA | 76,339 | 72 | 44.0% |
| Cypress, CA | 49,137 | 72 | 44.0% |
| La Mirada, CA | 48,260 | 72 | 44.0% |
| Monterey Park, CA | 60,597 | 72 | 44.0% |
| Carson, CA | 91,354 | 72 | 44.0% |
| City | Population | Air Quality Index | National Avg. |
| Suffolk, VA | 91,383 | 40 | 20.0% |
| Tracy, CA | 91,462 | 45 | 10.0% |
| Alafaya, FL | 91,468 | 39 | 22.0% |
| Maple Ridge, BC | 91,475 | n/a | |
| Kirkland, WA | 91,146 | 45 | 10.0% |
| Carson, CA | 91,354 | 72 | 44.0% |
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