| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 45°F | 69°F | 56°F | 0.8" |
| February | 48°F | 74°F | 60°F | 0.7" |
| March | 54°F | 81°F | 67°F | 0.5" |
| April | 60°F | 88°F | 74°F | 0.2" |
| May | 68°F | 96°F | 83°F | 0.2" |
| June | 79°F | 107°F | 94°F | 0.0" |
| July | 84°F | 108°F | 96°F | 0.9" |
| August | 83°F | 107°F | 94°F | 1.4" |
| September | 77°F | 102°F | 89°F | 0.8" |
| October | 65°F | 92°F | 78°F | 0.2" |
| November | 54°F | 80°F | 66°F | 0.4" |
| December | 45°F | 69°F | 55°F | 0.9" |
| Index | Alahambra | Phoenix | Arizona |
| Air quality index | 74 | 74 | 57 |
| Pollution index | 4,063,380 | 4,063,380 | 9,766,019 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 50 |
| Days with moderate air quality | 261 |
| Days w/ poor A.Q. for sensitive groups | 42 |
| Days with unhealthy air quality | 2 |
| Pollutant | Total |
| Arsenic | 0.004% |
| Benzene | 0.060% |
| Carbon Tetrachloride | 0.010% |
| Lead | 0.040% |
| Mercury | 0.001% |
| City | Population | Air Quality Index | National Avg. |
| El Mirage, AZ | 35,702 | 74 | 48.0% |
| Sun City, AZ | 38,888 | 74 | 48.0% |
| Youngtown, AZ | 6,837 | 74 | 48.0% |
| Paradise Valley, AZ | 14,502 | 74 | 48.0% |
| Tempe, AZ | 191,607 | 74 | 48.0% |
| Phoenix, AZ | 1,658,422 | 74 | 48.0% |
| City | Population | Air Quality Index | National Avg. |
| Philadelphia, PA | 1,581,531 | 51 | 2.0% |
| San Antonio, TX | 1,529,133 | 49 | 2.0% |
| Montréal, QC | 1,811,008 | n/a | |
| San Diego, CA | 1,414,545 | 64 | 28.0% |
| Calgary, AB | 1,371,990 | n/a | |
| Phoenix, AZ | 1,658,422 | 74 | 48.0% |
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