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| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 19°F | 46°F | 32°F | 0.5" |
| February | 20°F | 48°F | 33°F | 0.5" |
| March | 28°F | 58°F | 42°F | 0.9" |
| April | 33°F | 63°F | 47°F | 2.0" |
| May | 42°F | 70°F | 55°F | 2.3" |
| June | 53°F | 85°F | 68°F | 2.0" |
| July | 59°F | 88°F | 73°F | 2.3" |
| August | 57°F | 86°F | 71°F | 2.1" |
| September | 49°F | 79°F | 63°F | 1.7" |
| October | 37°F | 67°F | 51°F | 1.3" |
| November | 28°F | 58°F | 41°F | 0.4" |
| December | 18°F | 45°F | 30°F | 0.5" |
| Index | Centennial | Colorado | National |
| Air quality index | 58 | 38 | 42 |
| Pollution index | 10,406,900 | 2,068,342 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 91 |
| Days with moderate air quality | 252 |
| Days w/ poor A.Q. for sensitive groups | 20 |
| Days with unhealthy air quality | 2 |
| Pollutant | Total |
| Arsenic | 0.080% |
| Benzene | 0.070% |
| Carbon Tetrachloride | 0.010% |
| Lead | 0.250% |
| Mercury | 0.100% |
| City | Population | Air Quality Index | National Avg. |
| Englewood, CO | 34,840 | 58 | 16.0% |
| Applewood, CO | 8,300 | 58 | 16.0% |
| Denver, CO | 715,878 | 58 | 16.0% |
| North Washington, CO | 663 | 58 | 16.0% |
| Franktown, CO | 214 | 58 | 16.0% |
| Centennial, CO | 111,331 | 58 | 16.0% |
| City | Population | Air Quality Index | National Avg. |
| Lowell, MA | 111,311 | 37 | 26.0% |
| Downey, CA | 111,263 | 72 | 44.0% |
| Pompano Beach, FL | 111,202 | 41 | 18.0% |
| Antioch, CA | 111,468 | 45 | 10.0% |
| Thunder Bay, ON | 111,499 | n/a | |
| Centennial, CO | 111,331 | 58 | 16.0% |
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