| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 14°F | 47°F | 29°F | 0.7" |
| February | 18°F | 53°F | 34°F | 0.6" |
| March | 23°F | 62°F | 42°F | 0.6" |
| April | 29°F | 69°F | 49°F | 0.8" |
| May | 37°F | 76°F | 58°F | 0.5" |
| June | 47°F | 88°F | 70°F | 0.7" |
| July | 55°F | 88°F | 72°F | 2.3" |
| August | 52°F | 85°F | 68°F | 2.2" |
| September | 44°F | 80°F | 62°F | 1.5" |
| October | 32°F | 70°F | 50°F | 1.9" |
| November | 21°F | 59°F | 39°F | 1.2" |
| December | 15°F | 47°F | 29°F | 1.2" |
| Index | Milan | New Mexico | National |
| Air quality index | 17 | 37 | 42 |
| Pollution index | 1,807,920 | 2,051,791 | 2,726,193 |
| Measurement | Total |
| Days measured | 128 |
| Days with good air quality | 127 |
| Days with moderate air quality | 1 |
| Days w/ poor A.Q. for sensitive groups | |
| Days with unhealthy air quality |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.040% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Bluewater Acres, NM | 218 | 17 | 66.0% |
| Bluewater Village, NM | 63 | 17 | 66.0% |
| Grants, NM | 8,987 | 17 | 66.0% |
| San Rafael, NM | 1,757 | 17 | 66.0% |
| Anzac Village, NM | 44 | 53 | 6.0% |
| Milan, NM | 3,665 | 17 | 66.0% |
| City | Population | Air Quality Index | National Avg. |
| Inman, SC | 3,665 | 44 | 12.0% |
| Ballinger, TX | 3,665 | 33 | 34.0% |
| Woodlands, MB | 3,665 | n/a | |
| Newport, MN | 3,664 | 46 | 8.0% |
| Trappe, PA | 3,664 | 51 | 2.0% |
| Milan, NM | 3,665 | 17 | 66.0% |
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