| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 48°F | 68°F | 58°F | 2.7" |
| February | 49°F | 68°F | 58°F | 2.1" |
| March | 52°F | 68°F | 59°F | 1.2" |
| April | 54°F | 70°F | 61°F | 0.6" |
| May | 57°F | 70°F | 63°F | 0.3" |
| June | 61°F | 72°F | 65°F | 0.0" |
| July | 64°F | 76°F | 69°F | 0.1" |
| August | 64°F | 76°F | 69°F | 0.0" |
| September | 63°F | 77°F | 69°F | 0.2" |
| October | 60°F | 77°F | 67°F | 0.6" |
| November | 54°F | 73°F | 62°F | 0.7" |
| December | 48°F | 68°F | 57°F | 2.4" |
| Index | El Segundo | 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% |
| Bell Gardens, CA | 41,770 | 72 | 44.0% |
| Bell, CA | 35,301 | 72 | 44.0% |
| East Rancho Dominguez, CA | 15,252 | 72 | 44.0% |
| Lynwood, CA | 69,625 | 72 | 44.0% |
| El Segundo, CA | 16,575 | 72 | 44.0% |
| City | Population | Air Quality Index | National Avg. |
| Republic, MO | 16,571 | 39 | 22.0% |
| Aberdeen, WA | 16,571 | 20 | 60.0% |
| Laconia, NH | 16,584 | 31 | 38.0% |
| Lemay, MO | 16,565 | 54 | 8.0% |
| Country Club Hills, IL | 16,564 | 55 | 10.0% |
| El Segundo, CA | 16,575 | 72 | 44.0% |
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