| 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 | Salem | Utah | National |
| Air quality index | 46 | 45 | 42 |
| Pollution index | 688,749 | 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 | 0.000% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.010% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Lake Shore, UT | 1,020 | 46 | 8.0% |
| Springville, UT | 33,251 | 46 | 8.0% |
| Elk Ridge, UT | 3,994 | 46 | 8.0% |
| Rocky Ridge, UT | 1,069 | 46 | 8.0% |
| Mapleton, UT | 10,270 | 46 | 8.0% |
| Salem, UT | 8,403 | 46 | 8.0% |
| City | Population | Air Quality Index | National Avg. |
| Kapuskasing, ON | 8,403 | n/a | |
| Arab, AL | 8,405 | 44 | 12.0% |
| Cape St. Claire, MD | 8,405 | 46 | 8.0% |
| Socorro, NM | 8,406 | 53 | 6.0% |
| Greenville, MI | 8,407 | 38 | 24.0% |
| Salem, UT | 8,403 | 46 | 8.0% |
Here are the best places to live in Utah
Check out the 10 most dangerous cities in Utah
Safest Cities In The US
See the best places to live in Salem