| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 18°F | 43°F | 29°F | 0.9" |
| February | 24°F | 51°F | 36°F | 0.7" |
| March | 29°F | 62°F | 45°F | 0.5" |
| April | 35°F | 70°F | 52°F | 0.6" |
| May | 43°F | 79°F | 61°F | 0.6" |
| June | 53°F | 91°F | 73°F | 0.2" |
| July | 61°F | 94°F | 77°F | 0.7" |
| August | 59°F | 91°F | 74°F | 1.0" |
| September | 50°F | 83°F | 66°F | 1.2" |
| October | 38°F | 71°F | 53°F | 0.9" |
| November | 27°F | 58°F | 41°F | 0.5" |
| December | 19°F | 45°F | 31°F | 0.7" |
| Index | Farmington | New Mexico | National |
| Air quality index | 49 | 37 | 42 |
| Pollution index | 1,100,470 | 2,051,791 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 208 |
| Days with moderate air quality | 157 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.004% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Kirtland, NM | 711 | 49 | 2.0% |
| Nenahnezad, NM | 470 | 49 | 2.0% |
| Upper Fruitland, NM | 1,601 | 49 | 2.0% |
| Aztec, NM | 6,467 | 49 | 2.0% |
| La Plata, NM | 2,078 | 49 | 2.0% |
| Farmington, NM | 44,967 | 49 | 2.0% |
| City | Population | Air Quality Index | National Avg. |
| Oakland Park, FL | 44,950 | 41 | 18.0% |
| Danville, CA | 44,933 | 40 | 20.0% |
| Attleboro, MA | 45,023 | 44 | 12.0% |
| Winter Garden, FL | 44,888 | 39 | 22.0% |
| Plainfield, IL | 44,857 | 55 | 10.0% |
| Farmington, NM | 44,967 | 49 | 2.0% |
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