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| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 20°F | 38°F | 28°F | 1.3" |
| February | 27°F | 47°F | 36°F | 1.1" |
| March | 33°F | 58°F | 45°F | 1.8" |
| April | 38°F | 64°F | 51°F | 2.4" |
| May | 46°F | 74°F | 60°F | 2.0" |
| June | 57°F | 88°F | 72°F | 0.9" |
| July | 67°F | 96°F | 82°F | 0.5" |
| August | 64°F | 93°F | 79°F | 0.7" |
| September | 54°F | 83°F | 68°F | 1.3" |
| October | 42°F | 68°F | 54°F | 1.2" |
| November | 32°F | 54°F | 42°F | 1.2" |
| December | 22°F | 40°F | 30°F | 1.6" |
| Index | Herriman | Utah | National |
| Air quality index | 51 | 45 | 42 |
| Pollution index | 17,030,300 | 3,340,369 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 170 |
| Days with moderate air quality | 178 |
| Days w/ poor A.Q. for sensitive groups | 17 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.280% |
| Benzene | 0.230% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.360% |
| Mercury | 0.040% |
| City | Population | Air Quality Index | National Avg. |
| Eagle Mountain, UT | 35,431 | 46 | 8.0% |
| Lehi, UT | 66,980 | 46 | 8.0% |
| Saratoga Springs, UT | 31,273 | 46 | 8.0% |
| Cedar Hills, UT | 10,190 | 46 | 8.0% |
| Vineyard, UT | 8,628 | 46 | 8.0% |
| Herriman, UT | 45,211 | 51 | 2.0% |
| City | Population | Air Quality Index | National Avg. |
| Hilo, HI | 45,248 | 16 | 68.0% |
| Rockwall, TX | 45,168 | 51 | 2.0% |
| Pearl City, HI | 45,159 | 30 | 40.0% |
| West Seneca, NY | 45,272 | 39 | 22.0% |
| Oro Valley, AZ | 45,303 | 47 | 6.0% |
| Herriman, UT | 45,211 | 51 | 2.0% |
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