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| 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 | Oro Valley | 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. |
| Catalina Foothills, AZ | 50,631 | 47 | 6.0% |
| Summerhaven, AZ | 35 | 47 | 6.0% |
| Tucson, AZ | 545,340 | 47 | 6.0% |
| Marana, AZ | 47,164 | 47 | 6.0% |
| Flowing Wells, AZ | 17,227 | 47 | 6.0% |
| Oro Valley, AZ | 45,303 | 47 | 6.0% |
| City | Population | Air Quality Index | National Avg. |
| West Seneca, NY | 45,272 | 39 | 22.0% |
| Hilo, HI | 45,248 | 16 | 68.0% |
| Arlington, MA | 45,379 | 43 | 14.0% |
| Herriman, UT | 45,211 | 51 | 2.0% |
| Rockwall, TX | 45,168 | 51 | 2.0% |
| Oro Valley, AZ | 45,303 | 47 | 6.0% |
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