| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 15°F | 38°F | 26°F | 0.7" |
| February | 23°F | 48°F | 34°F | 0.5" |
| March | 30°F | 60°F | 45°F | 0.6" |
| April | 36°F | 68°F | 52°F | 1.0" |
| May | 45°F | 78°F | 62°F | 0.9" |
| June | 56°F | 91°F | 75°F | 0.5" |
| July | 63°F | 96°F | 79°F | 0.9" |
| August | 60°F | 92°F | 76°F | 1.0" |
| September | 52°F | 84°F | 67°F | 1.3" |
| October | 39°F | 69°F | 53°F | 1.0" |
| November | 27°F | 55°F | 40°F | 0.6" |
| December | 16°F | 39°F | 27°F | 0.9" |
| Index | Clifton | Colorado | National |
| Air quality index | 44 | 38 | 42 |
| Pollution index | 191,459 | 2,068,342 | 2,726,193 |
| Measurement | Total |
| Days measured | 364 |
| Days with good air quality | 289 |
| Days with moderate air quality | 75 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.003% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.002% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Fruitvale, CO | 8,352 | 44 | 12.0% |
| Grand Junction, CO | 62,218 | 44 | 12.0% |
| Orchard Mesa, CO | 6,484 | 44 | 12.0% |
| Palisade, CO | 2,783 | 44 | 12.0% |
| Fruita, CO | 14,068 | 44 | 12.0% |
| Clifton, CO | 20,783 | 44 | 12.0% |
| City | Population | Air Quality Index | National Avg. |
| Lebanon, OH | 20,781 | 43 | 14.0% |
| McNair, VA | 20,776 | 47 | 6.0% |
| South El Monte, CA | 20,791 | 72 | 44.0% |
| Ypsilanti, MI | 20,792 | 40 | 20.0% |
| Sainte-Marthe-sur-le-Lac, QC | 20,759 | n/a | |
| Clifton, CO | 20,783 | 44 | 12.0% |
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