| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 16°F | 45°F | 29°F | 2.4" |
| February | 18°F | 48°F | 33°F | 2.0" |
| March | 23°F | 55°F | 39°F | 1.5" |
| April | 26°F | 62°F | 45°F | 0.9" |
| May | 33°F | 69°F | 53°F | 0.8" |
| June | 42°F | 81°F | 64°F | 0.4" |
| July | 51°F | 83°F | 67°F | 3.5" |
| August | 50°F | 80°F | 64°F | 3.7" |
| September | 42°F | 75°F | 58°F | 1.8" |
| October | 31°F | 66°F | 48°F | 1.3" |
| November | 23°F | 56°F | 38°F | 1.2" |
| December | 15°F | 46°F | 30°F | 2.6" |
| Index | Flagstaff | Arizona | National |
| Air quality index | 45 | 57 | 42 |
| Pollution index | 15,258,300 | 9,766,019 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 293 |
| Days with moderate air quality | 72 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.430% |
| Benzene | 0.060% |
| Carbon Tetrachloride | 0.010% |
| Lead | 0.130% |
| Mercury | 0.150% |
| City | Population | Air Quality Index | National Avg. |
| Mountainaire, AZ | 792 | 45 | 10.0% |
| Doney Park, AZ | 4,891 | 45 | 10.0% |
| Fort Valley, AZ | 2,108 | 45 | 10.0% |
| Kachina Village, AZ | 3,154 | 45 | 10.0% |
| Flagstaff, AZ | 73,319 | 45 | 10.0% |
| City | Population | Air Quality Index | National Avg. |
| Apple Valley, CA | 73,339 | 89 | 78.0% |
| Ellicott City, MD | 73,272 | 46 | 8.0% |
| Schaumburg, IL | 73,392 | 55 | 10.0% |
| Bismarck, ND | 73,435 | 36 | 28.0% |
| Cheektowaga, NY | 73,457 | 39 | 22.0% |
| Flagstaff, AZ | 73,319 | 45 | 10.0% |
Here are the best places to live in Arizona
Check out the 10 safest cities in Arizona
Most Dangerous Cities In The US
Check out the 10 most dangerous cities in Arizona