| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 17°F | 33°F | 25°F | 3.9" |
| February | 24°F | 43°F | 32°F | 2.5" |
| March | 33°F | 55°F | 43°F | 2.5" |
| April | 38°F | 62°F | 49°F | 2.5" |
| May | 45°F | 71°F | 58°F | 3.1" |
| June | 54°F | 85°F | 70°F | 3.6" |
| July | 62°F | 92°F | 77°F | 1.9" |
| August | 60°F | 89°F | 74°F | 2.7" |
| September | 50°F | 79°F | 64°F | 4.4" |
| October | 39°F | 64°F | 51°F | 3.2" |
| November | 30°F | 51°F | 39°F | 2.0" |
| December | 21°F | 36°F | 28°F | 2.2" |
| Index | Highland | Utah | National |
| Air quality index | 46 | 45 | 42 |
| Pollution index | 17,030,300 | 3,340,369 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 253 |
| Days with moderate air quality | 111 |
| Days w/ poor A.Q. for sensitive groups | 1 |
| 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% |
| Saratoga Springs, UT | 31,273 | 46 | 8.0% |
| Pleasant Grove, UT | 38,474 | 46 | 8.0% |
| Lindon, UT | 11,072 | 46 | 8.0% |
| Vineyard, UT | 8,628 | 46 | 8.0% |
| Highland, UT | 19,012 | 46 | 8.0% |
| City | Population | Air Quality Index | National Avg. |
| Port Alberni, BC | 19,018 | n/a | |
| Seabrook, MD | 19,020 | 47 | 6.0% |
| Rosedale, CA | 19,003 | 67 | 34.0% |
| Sainte-Catherine, QC | 19,000 | n/a | |
| Liberal, KS | 19,025 | 15 | 70.0% |
| Highland, UT | 19,012 | 46 | 8.0% |
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