| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 2°F | 29°F | 13°F | 4.0" |
| February | 10°F | 36°F | 21°F | 0.5" |
| March | 19°F | 47°F | 31°F | 0.4" |
| April | 25°F | 58°F | 40°F | 1.3" |
| May | 34°F | 66°F | 50°F | 1.7" |
| June | 39°F | 76°F | 58°F | 10.0" |
| July | 46°F | 84°F | 64°F | 2.0" |
| August | 46°F | 79°F | 61°F | 3.2" |
| September | 38°F | 72°F | 53°F | 2.3" |
| October | 27°F | 61°F | 42°F | 3.5" |
| November | 15°F | 50°F | 30°F | 1.3" |
| December | -4°F | 22°F | 7°F | 1.7" |
| Index | Garfield | Colorado | National |
| Air quality index | 16 | 38 | 42 |
| Pollution index | 187,673 | 2,068,342 | 2,726,193 |
| Measurement | Total |
| Days measured | 62 |
| Days with good air quality | 60 |
| Days with moderate air quality | 2 |
| Days w/ poor A.Q. for sensitive groups | |
| Days with unhealthy air quality |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.003% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Maysville, CO | 101 | 16 | 68.0% |
| Poncha Springs, CO | 1,041 | 16 | 68.0% |
| Pitkin, CO | 137 | 16 | 68.0% |
| Garfield, CO | 0 | 16 | 68.0% |
| City | Population | Air Quality Index | National Avg. |
| Chase, AK | 0 | 31 | 38.0% |
| Chiniak, AK | 0 | 31 | 38.0% |
| Chisana, AK | 0 | 31 | 38.0% |
| Dot Lake, AK | 0 | 38 | 24.0% |
| Eureka Roadhouse, AK | 0 | 31 | 38.0% |
| Garfield, CO | 0 | 16 | 68.0% |
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