| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 45°F | 62°F | 52°F | 11.2" |
| February | 45°F | 61°F | 52°F | 3.4" |
| March | 46°F | 62°F | 53°F | 1.1" |
| April | 46°F | 62°F | 53°F | 20.7" |
| May | 49°F | 62°F | 55°F | 0.1" |
| June | 52°F | 64°F | 57°F | 0.0" |
| July | 54°F | 64°F | 58°F | 0.0" |
| August | 54°F | 65°F | 59°F | 0.0" |
| September | 54°F | 68°F | 60°F | 0.0" |
| October | 52°F | 69°F | 59°F | 0.3" |
| November | 48°F | 65°F | 55°F | 0.6" |
| December | 44°F | 60°F | 50°F | 0.1" |
| Index | Las Lomas | California | National |
| Air quality index | 37 | 55 | 42 |
| Pollution index | 5,429,550 | 10,473,190 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 330 |
| Days with moderate air quality | 34 |
| Days w/ poor A.Q. for sensitive groups | 1 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.020% |
| Benzene | 0.080% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.050% |
| Mercury | 0.150% |
| City | Population | Air Quality Index | National Avg. |
| Day Valley, CA | 3,414 | 35 | 30.0% |
| Live Oak city, CA | 8,501 | 35 | 30.0% |
| Seacliff, CA | 3,580 | 35 | 30.0% |
| Corralitos, CA | 2,260 | 35 | 30.0% |
| Aptos, CA | 6,245 | 35 | 30.0% |
| Las Lomas, CA | 3,818 | 37 | 26.0% |
| City | Population | Air Quality Index | National Avg. |
| Coal Valley, IL | 3,817 | 46 | 8.0% |
| Dwight, IL | 3,817 | 0 | 100.0% |
| North Hudson, WI | 3,819 | 46 | 8.0% |
| Siksika 146, AB | 3,820 | n/a | |
| Umatilla, FL | 3,814 | 37 | 26.0% |
| Las Lomas, CA | 3,818 | 37 | 26.0% |
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