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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 | Holladay | 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. |
| Alpine, UT | 10,509 | 46 | 8.0% |
| Salt Lake City, UT | 200,133 | 51 | 2.0% |
| Snyderville, UT | 5,995 | 51 | 2.0% |
| Draper, UT | 48,594 | 51 | 2.0% |
| Riverton, UT | 43,793 | 51 | 2.0% |
| Holladay, UT | 30,461 | 51 | 2.0% |
| City | Population | Air Quality Index | National Avg. |
| Parkville, MD | 30,459 | 46 | 8.0% |
| Atascadero, CA | 30,444 | 46 | 8.0% |
| Cochrane, AB | 30,481 | n/a | |
| Kingman, AZ | 30,433 | 13 | 74.0% |
| LaGrange, GA | 30,494 | 42 | 16.0% |
| Holladay, UT | 30,461 | 51 | 2.0% |
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