| 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 | Hermosa Beach | 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% |
| Carson, CA | 91,354 | 72 | 44.0% |
| Huntington Park, CA | 57,761 | 72 | 44.0% |
| Maywood, CA | 27,127 | 72 | 44.0% |
| Hermosa Beach, CA | 19,147 | 72 | 44.0% |
| City | Population | Air Quality Index | National Avg. |
| Nanuet, NY | 19,148 | 51 | 2.0% |
| North Liberty, IA | 19,159 | 35 | 30.0% |
| McKeesport, PA | 19,128 | 56 | 12.0% |
| Frankfort, IL | 19,166 | 55 | 10.0% |
| Corner Brook, NL | 19,117 | n/a | |
| Hermosa Beach, CA | 19,147 | 72 | 44.0% |
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