| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 26°F | 54°F | 39°F | 0.7" |
| February | 29°F | 60°F | 44°F | 0.3" |
| March | 35°F | 68°F | 52°F | 0.1" |
| April | 40°F | 73°F | 57°F | 0.1" |
| May | 45°F | 79°F | 63°F | 0.1" |
| June | 59°F | 92°F | 77°F | 0.5" |
| July | 63°F | 89°F | 76°F | 1.5" |
| August | 61°F | 87°F | 74°F | 2.6" |
| September | 56°F | 83°F | 69°F | 1.1" |
| October | 44°F | 75°F | 59°F | 0.3" |
| November | 34°F | 62°F | 47°F | 0.2" |
| December | 27°F | 54°F | 39°F | 0.9" |
| Index | Bayard | New Mexico | National |
| Air quality index | 37 | 37 | 42 |
| Pollution index | 3,438,690 | 2,051,791 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 362 |
| Days with moderate air quality | 3 |
| Days w/ poor A.Q. for sensitive groups | |
| Days with unhealthy air quality |
| Pollutant | Total |
| Arsenic | 0.004% |
| Benzene | 0.060% |
| Carbon Tetrachloride | 0.010% |
| Lead | 0.040% |
| Mercury | 0.003% |
| City | Population | Air Quality Index | National Avg. |
| Arenas Valley, NM | 1,224 | 37 | 26.0% |
| Mimbres, NM | 404 | 37 | 26.0% |
| San Lorenzo, NM | 149 | 37 | 26.0% |
| White Signal, NM | 290 | 37 | 26.0% |
| Cobre, NM | 27 | 37 | 26.0% |
| Bayard, NM | 2,415 | 37 | 26.0% |
| City | Population | Air Quality Index | National Avg. |
| Herald Harbor, MD | 2,414 | 46 | 8.0% |
| Excelsior, MN | 2,414 | 46 | 8.0% |
| Richwood, OH | 2,414 | 46 | 8.0% |
| Wright-Patterson AFB, OH | 2,414 | 47 | 6.0% |
| Rockdale, IL | 2,416 | 55 | 10.0% |
| Bayard, NM | 2,415 | 37 | 26.0% |
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