| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 16°F | 42°F | 28°F | 0.9" |
| February | 21°F | 48°F | 34°F | 1.0" |
| March | 26°F | 58°F | 42°F | 1.4" |
| April | 31°F | 65°F | 48°F | 1.2" |
| May | 39°F | 74°F | 57°F | 1.3" |
| June | 49°F | 87°F | 70°F | 0.5" |
| July | 58°F | 92°F | 75°F | 1.4" |
| August | 55°F | 89°F | 73°F | 1.2" |
| September | 45°F | 81°F | 64°F | 0.9" |
| October | 34°F | 68°F | 51°F | 1.1" |
| November | 25°F | 56°F | 40°F | 0.7" |
| December | 16°F | 43°F | 28°F | 1.3" |
| Index | Summit | Utah | National |
| Air quality index | 44 | 45 | 42 |
| Pollution index | 1,560,380 | 3,340,369 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 291 |
| Days with moderate air quality | 74 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.002% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.010% |
| Mercury | 0.002% |
| City | Population | Air Quality Index | National Avg. |
| Enoch, UT | 7,044 | 44 | 12.0% |
| Parowan, UT | 3,104 | 44 | 12.0% |
| Brian Head, UT | 43 | 44 | 12.0% |
| Paragonah, UT | 511 | 44 | 12.0% |
| Cedar City, UT | 33,404 | 44 | 12.0% |
| Summit, UT | 252 | 44 | 12.0% |
| City | Population | Air Quality Index | National Avg. |
| Anderson, AL | 252 | 37 | 26.0% |
| Carolina, AL | 252 | 31 | 38.0% |
| Geiger, AL | 252 | 36 | 28.0% |
| Waverly, AL | 252 | 42 | 16.0% |
| O'Kean, AR | 252 | 26 | 48.0% |
| Summit, UT | 252 | 44 | 12.0% |
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