| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 18°F | 50°F | 33°F | 0.5" |
| February | 23°F | 57°F | 40°F | 0.2" |
| March | 29°F | 65°F | 47°F | 0.3" |
| April | 35°F | 72°F | 54°F | 0.2" |
| May | 43°F | 80°F | 63°F | 0.4" |
| June | 54°F | 92°F | 75°F | 0.2" |
| July | 62°F | 92°F | 76°F | 1.8" |
| August | 59°F | 89°F | 73°F | 2.1" |
| September | 51°F | 84°F | 67°F | 1.0" |
| October | 38°F | 74°F | 56°F | 0.6" |
| November | 27°F | 63°F | 44°F | 0.4" |
| December | 21°F | 50°F | 34°F | 0.5" |
| Index | Concho | Arizona | National |
| Air quality index | 44 | 57 | 42 |
| Pollution index | 841,255 | 9,766,019 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 294 |
| Days with moderate air quality | 70 |
| Days w/ poor A.Q. for sensitive groups | 1 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| St. Johns, AZ | 3,507 | 44 | 12.0% |
| St. Johns CDP, AZ | 726 | 44 | 12.0% |
| Concho, AZ | 0 | 44 | 12.0% |
| 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% |
| Concho, AZ | 0 | 44 | 12.0% |
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