| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 40°F | 66°F | 52°F | 5.4" |
| February | 42°F | 71°F | 55°F | 5.8" |
| March | 47°F | 78°F | 62°F | 3.2" |
| April | 52°F | 84°F | 68°F | 4.5" |
| May | 60°F | 91°F | 76°F | 6.3" |
| June | 71°F | 102°F | 87°F | 2.7" |
| July | 75°F | 99°F | 86°F | 7.6" |
| August | 74°F | 98°F | 85°F | 4.9" |
| September | 69°F | 94°F | 81°F | 9.2" |
| October | 58°F | 87°F | 72°F | 3.2" |
| November | 49°F | 77°F | 62°F | 3.1" |
| December | 40°F | 66°F | 51°F | 4.9" |
| Index | San Manuel | Arizona | National |
| Air quality index | 47 | 57 | 42 |
| Pollution index | 3,235,590 | 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 | 0.070% |
| Benzene | 0.050% |
| Carbon Tetrachloride | 0.010% |
| Lead | 0.050% |
| Mercury | 0.050% |
| City | Population | Air Quality Index | National Avg. |
| Campo Bonito, AZ | 59 | 47 | 6.0% |
| Summerhaven, AZ | 35 | 47 | 6.0% |
| Catalina, AZ | 6,738 | 47 | 6.0% |
| Mammoth, AZ | 1,527 | 47 | 6.0% |
| Oracle, AZ | 3,932 | 47 | 6.0% |
| San Manuel, AZ | 3,688 | 47 | 6.0% |
| City | Population | Air Quality Index | National Avg. |
| Clifton, AZ | 3,689 | 37 | 26.0% |
| North Okanagan B, BC | 3,689 | n/a | |
| Millvale, PA | 3,686 | 56 | 12.0% |
| Lake Cowichan, BC | 3,686 | n/a | |
| Pincher Creek, AB | 3,690 | n/a | |
| San Manuel, AZ | 3,688 | 47 | 6.0% |
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