| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 48°F | 69°F | 57°F | 2.3" |
| February | 49°F | 69°F | 58°F | 1.9" |
| March | 52°F | 70°F | 60°F | 0.9" |
| April | 54°F | 72°F | 62°F | 0.6" |
| May | 59°F | 73°F | 65°F | 0.3" |
| June | 62°F | 76°F | 67°F | 0.0" |
| July | 66°F | 80°F | 71°F | 0.1" |
| August | 66°F | 82°F | 72°F | 0.0" |
| September | 65°F | 82°F | 72°F | 0.2" |
| October | 60°F | 79°F | 68°F | 0.5" |
| November | 54°F | 75°F | 63°F | 0.7" |
| December | 48°F | 68°F | 57°F | 2.4" |
| Index | El Camino Real | Irvine | California |
| Air quality index | 89 | 89 | 55 |
| Pollution index | 44,192,600 | 44,192,600 | 10,473,190 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 42 |
| Days with moderate air quality | 178 |
| Days w/ poor A.Q. for sensitive groups | 79 |
| Days with unhealthy air quality | 58 |
| Pollutant | Total |
| Arsenic | 0.030% |
| Benzene | 0.280% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.220% |
| Mercury | 0.140% |
| City | Population | Air Quality Index | National Avg. |
| Fullerton, CA | 141,061 | 72 | 44.0% |
| Westminster, CA | 90,857 | 72 | 44.0% |
| Garden Grove, CA | 172,800 | 72 | 44.0% |
| Huntington Beach, CA | 199,778 | 72 | 44.0% |
| La Mirada, CA | 48,260 | 72 | 44.0% |
| Irvine, CA | 272,694 | 89 | 78.0% |
| City | Population | Air Quality Index | National Avg. |
| Toledo, OH | 275,116 | 40 | 20.0% |
| Durham, NC | 276,341 | 44 | 12.0% |
| Chula Vista, CA | 268,779 | 64 | 28.0% |
| Fort Wayne, IN | 268,378 | 45 | 10.0% |
| Saskatoon, SK | 281,340 | n/a | |
| Irvine, CA | 272,694 | 89 | 78.0% |
Here are the best places to live in California
These are the 10 most affordable cities in California
10 Best cities in California for employment
Check out the 10 safest cities in California