| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 20°F | 34°F | 27°F | 3.5" |
| February | 26°F | 42°F | 33°F | 2.4" |
| March | 34°F | 53°F | 42°F | 3.1" |
| April | 38°F | 60°F | 48°F | 4.1" |
| May | 46°F | 70°F | 57°F | 4.9" |
| June | 56°F | 83°F | 69°F | 3.2" |
| July | 65°F | 91°F | 78°F | 2.6" |
| August | 63°F | 88°F | 75°F | 3.0" |
| September | 54°F | 78°F | 65°F | 4.4" |
| October | 42°F | 63°F | 52°F | 3.7" |
| November | 33°F | 50°F | 40°F | 3.4" |
| December | 22°F | 36°F | 28°F | 3.8" |
| Index | Henefer | 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. |
| Morgan, UT | 4,259 | 45 | 10.0% |
| Hoytsville, UT | 524 | 51 | 2.0% |
| Wanship, UT | 481 | 51 | 2.0% |
| Coalville, UT | 2,066 | 51 | 2.0% |
| Echo, UT | 44 | 51 | 2.0% |
| Henefer, UT | 844 | 51 | 2.0% |
| City | Population | Air Quality Index | National Avg. |
| Tuntutuliak, AK | 844 | 31 | 38.0% |
| Danielsville, GA | 844 | 44 | 12.0% |
| Battle Creek, IA | 844 | 35 | 30.0% |
| Montrose, IA | 844 | 29 | 42.0% |
| Morgan, MN | 844 | 32 | 36.0% |
| Henefer, UT | 844 | 51 | 2.0% |
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