| 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 | Shiprock | New Mexico | National |
| Air quality index | 49 | 37 | 42 |
| Pollution index | 13,376,300 | 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 | 0.030% |
| Benzene | 0.190% |
| Carbon Tetrachloride | 0.060% |
| Lead | 0.140% |
| Mercury | 0.010% |
| City | Population | Air Quality Index | National Avg. |
| Waterflow, NM | 1,552 | 49 | 2.0% |
| Nenahnezad, NM | 470 | 49 | 2.0% |
| Shiprock, NM | 8,588 | 49 | 2.0% |
| City | Population | Air Quality Index | National Avg. |
| New Square, NY | 8,589 | 51 | 2.0% |
| Barre, VT | 8,590 | 34 | 32.0% |
| Bayport, NY | 8,584 | 43 | 14.0% |
| Richmond Heights, MO | 8,581 | 54 | 8.0% |
| Independence, KS | 8,595 | 38 | 24.0% |
| Shiprock, NM | 8,588 | 49 | 2.0% |
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