| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 40°F | 66°F | 55°F | n/a |
| February | 42°F | 70°F | 59°F | n/a |
| March | 47°F | 78°F | 67°F | n/a |
| April | 53°F | 84°F | 73°F | n/a |
| May | 60°F | 90°F | 80°F | n/a |
| June | 71°F | 101°F | 92°F | n/a |
| July | 77°F | 99°F | 90°F | n/a |
| August | 75°F | 98°F | 89°F | n/a |
| September | 70°F | 94°F | 85°F | n/a |
| October | 57°F | 87°F | 76°F | n/a |
| November | 49°F | 76°F | 65°F | n/a |
| December | 41°F | 66°F | 55°F | n/a |
| Index | Sells | Arizona | National |
| Air quality index | 47 | 57 | 42 |
| Pollution index | 4,063,380 | 9,766,019 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 225 |
| Days with moderate air quality | 138 |
| Days w/ poor A.Q. for sensitive groups | 2 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.004% |
| Benzene | 0.060% |
| Carbon Tetrachloride | 0.010% |
| Lead | 0.040% |
| Mercury | 0.001% |
| City | Population | Air Quality Index | National Avg. |
| Cowlic, AZ | 98 | 31 | 38.0% |
| South Komelik, AZ | 455 | 31 | 38.0% |
| Topawa, AZ | 382 | 31 | 38.0% |
| Ko Vaya, AZ | 26 | 47 | 6.0% |
| Ali Chukson, AZ | 49 | 47 | 6.0% |
| Sells, AZ | 2,453 | 47 | 6.0% |
| City | Population | Air Quality Index | National Avg. |
| Ross, CA | 2,453 | 40 | 20.0% |
| Amboy, IL | 2,453 | 0 | 100.0% |
| Cricket, NC | 2,453 | 26 | 48.0% |
| Lakeview, CA | 2,452 | 89 | 78.0% |
| Hayden, CO | 2,452 | 47 | 6.0% |
| Sells, AZ | 2,453 | 47 | 6.0% |
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