| 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 | Morgan | Utah | National |
| Air quality index | 45 | 45 | 42 |
| Pollution index | 17,030,300 | 3,340,369 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 244 |
| Days with moderate air quality | 113 |
| Days w/ poor A.Q. for sensitive groups | 8 |
| 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. |
| Layton, UT | 77,268 | 45 | 10.0% |
| Ogden, UT | 87,175 | 45 | 10.0% |
| South Weber, UT | 7,631 | 45 | 10.0% |
| South Ogden, UT | 17,080 | 45 | 10.0% |
| Fruit Heights, UT | 6,205 | 45 | 10.0% |
| Morgan, UT | 4,259 | 45 | 10.0% |
| City | Population | Air Quality Index | National Avg. |
| North Richmond, CA | 4,258 | 40 | 20.0% |
| North Plymouth, MA | 4,258 | 36 | 28.0% |
| Centralia, MO | 4,260 | 38 | 24.0% |
| Medina, TN | 4,260 | 27 | 46.0% |
| High Ridge, MO | 4,257 | 54 | 8.0% |
| Morgan, UT | 4,259 | 45 | 10.0% |
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