| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 29°F | 52°F | 39°F | 4.2" |
| February | 31°F | 54°F | 42°F | 3.4" |
| March | 39°F | 65°F | 52°F | 4.1" |
| April | 49°F | 75°F | 62°F | 5.6" |
| May | 56°F | 82°F | 69°F | 5.1" |
| June | 66°F | 90°F | 78°F | 3.9" |
| July | 69°F | 92°F | 80°F | 5.0" |
| August | 69°F | 92°F | 79°F | 4.5" |
| September | 61°F | 86°F | 73°F | 4.0" |
| October | 49°F | 75°F | 61°F | 4.0" |
| November | 38°F | 64°F | 50°F | 3.8" |
| December | 33°F | 54°F | 43°F | 5.1" |
| Index | Mount Pleasant | Tennessee | National |
| Air quality index | 31 | 76 | 42 |
| Pollution index | 3,553,420 | 2,454,916 | 2,726,193 |
| Measurement | Total |
| Days measured | 116 |
| Days with good air quality | 99 |
| Days with moderate air quality | 17 |
| Days w/ poor A.Q. for sensitive groups | |
| Days with unhealthy air quality |
| Pollutant | Total |
| Arsenic | 0.001% |
| Benzene | 0.030% |
| Carbon Tetrachloride | 0.004% |
| Lead | 0.010% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Ethridge, TN | 720 | 27 | 46.0% |
| Summertown, TN | 521 | 27 | 46.0% |
| Columbia, TN | 39,515 | 31 | 38.0% |
| Lynnville, TN | 404 | 31 | 38.0% |
| Mount Pleasant, TN | 4,899 | 31 | 38.0% |
| City | Population | Air Quality Index | National Avg. |
| Meadows Place, TX | 4,899 | 52 | 4.0% |
| Long View, NC | 4,898 | 43 | 14.0% |
| Mattituck, NY | 4,898 | 41 | 18.0% |
| Houlton, ME | 4,897 | 31 | 38.0% |
| Sergeant Bluff, IA | 4,901 | 35 | 30.0% |
| Mount Pleasant, TN | 4,899 | 31 | 38.0% |
Here are the best places to live in Tennessee
See the best places to live in Mount Pleasant
Check out the 10 most dangerous cities in Tennessee
Most Dangerous States In The US