| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 14°F | 51°F | 31°F | 0.3" |
| February | 18°F | 54°F | 34°F | 0.5" |
| March | 26°F | 65°F | 44°F | 0.7" |
| April | 33°F | 71°F | 52°F | 1.7" |
| May | 43°F | 79°F | 61°F | 1.8" |
| June | 54°F | 93°F | 73°F | 1.0" |
| July | 59°F | 96°F | 77°F | 2.1" |
| August | 58°F | 92°F | 74°F | 2.3" |
| September | 49°F | 86°F | 67°F | 0.8" |
| October | 36°F | 74°F | 53°F | 0.8" |
| November | 23°F | 62°F | 41°F | 0.3" |
| December | 14°F | 49°F | 30°F | 0.4" |
| Index | Boone | Colorado | National |
| Air quality index | 20 | 38 | 42 |
| Pollution index | 647,355 | 2,068,342 | 2,726,193 |
| Measurement | Total |
| Days measured | 126 |
| Days with good air quality | 125 |
| Days with moderate air quality | 1 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.003% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Avondale, CO | 588 | 20 | 60.0% |
| Vineland, CO | 339 | 20 | 60.0% |
| Fowler, CO | 1,139 | 20 | 60.0% |
| Boone, CO | 255 | 20 | 60.0% |
| City | Population | Air Quality Index | National Avg. |
| Whittier, AK | 255 | 31 | 38.0% |
| Davis City, IA | 255 | 39 | 22.0% |
| Norris, IL | 255 | 41 | 18.0% |
| Pinesburg, MD | 255 | 40 | 20.0% |
| Michiana, MI | 255 | 37 | 26.0% |
| Boone, CO | 255 | 20 | 60.0% |
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