| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 21°F | 45°F | 31°F | 1.8" |
| February | 22°F | 46°F | 32°F | 2.0" |
| March | 30°F | 58°F | 42°F | 2.1" |
| April | 35°F | 63°F | 47°F | 4.0" |
| May | 44°F | 70°F | 55°F | 5.2" |
| June | 54°F | 84°F | 68°F | 4.6" |
| July | 60°F | 89°F | 73°F | 5.7" |
| August | 59°F | 87°F | 71°F | 4.5" |
| September | 51°F | 79°F | 63°F | 5.7" |
| October | 39°F | 67°F | 51°F | 4.1" |
| November | 29°F | 56°F | 41°F | 2.2" |
| December | 19°F | 44°F | 30°F | 2.9" |
| Index | Shenandoah | Aurora | Colorado |
| Air quality index | 58 | 58 | 38 |
| Pollution index | 10,406,900 | 10,406,900 | 2,034,619 |
| 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, State | Population | Air Quality Index | National Avg. |
| Arvada, CO | 113,532 | 58 | 16% |
| Castle Pines Village, CO | 4,518 | 58 | 16% |
| Columbine, CO | 25,281 | 58 | 16% |
| Derby, CO | 8,930 | 58 | 16% |
| Foxfield, CO | 732 | 58 | 16% |
| Aurora, CO | 351,131 | 58 | 16% |
| City, State | Population | Air Quality Index | National Avg. |
| Honolulu, HI | 349,597 | 30 | 40% |
| Anaheim, CA | 346,776 | 89 | 78% |
| Tampa, FL | 361,477 | 43 | 14% |
| Bakersfield, CA | 367,555 | 67 | 34% |
| Santa Ana, CA | 333,605 | 89 | 78% |
| Aurora, CO | 351,131 | 58 | 16% |
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