| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 45°F | 69°F | 56°F | 3.3" |
| February | 46°F | 70°F | 57°F | 2.5" |
| March | 49°F | 73°F | 60°F | 2.0" |
| April | 52°F | 75°F | 62°F | 0.6" |
| May | 56°F | 78°F | 65°F | 0.2" |
| June | 60°F | 83°F | 70°F | 0.0" |
| July | 65°F | 89°F | 75°F | 0.0" |
| August | 65°F | 90°F | 75°F | 0.0" |
| September | 63°F | 89°F | 74°F | 0.2" |
| October | 57°F | 82°F | 68°F | 0.5" |
| November | 50°F | 76°F | 62°F | 0.6" |
| December | 44°F | 68°F | 55°F | 2.1" |
| Index | Rossmoyne | Glendale | California |
| Air quality index | 72 | 72 | 55 |
| Pollution index | 139,490,000 | 139,490,000 | 10,473,190 |
| 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 | 0.200% |
| Benzene | 0.950% |
| Carbon Tetrachloride | 0.080% |
| Lead | 1.320% |
| Mercury | 0.440% |
| City | Population | Air Quality Index | National Avg. |
| La Crescenta-Montrose, CA | 20,171 | 72 | 44.0% |
| Montebello, CA | 62,697 | 72 | 44.0% |
| Whittier, CA | 84,821 | 72 | 44.0% |
| San Marino, CA | 13,020 | 72 | 44.0% |
| East Pasadena, CA | 6,025 | 72 | 44.0% |
| Glendale, CA | 199,357 | 72 | 44.0% |
| City | Population | Air Quality Index | National Avg. |
| Aurora, IL | 199,326 | 55 | 10.0% |
| Grand Rapids, MI | 199,417 | 38 | 24.0% |
| Amarillo, TX | 199,225 | 44 | 12.0% |
| Montgomery, AL | 199,054 | 52 | 4.0% |
| Huntington Beach, CA | 199,778 | 72 | 44.0% |
| Glendale, CA | 199,357 | 72 | 44.0% |
Here are the best places to live in California
Most Dangerous States In The US
Check out the 10 most dangerous cities in California
Check out the 10 safest cities in California