| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 33°F | 54°F | 42°F | 4.8" |
| February | 35°F | 57°F | 45°F | 3.2" |
| March | 44°F | 67°F | 54°F | 4.5" |
| April | 51°F | 76°F | 63°F | 4.9" |
| May | 59°F | 82°F | 70°F | 4.3" |
| June | 67°F | 91°F | 78°F | 4.2" |
| July | 70°F | 92°F | 80°F | 5.3" |
| August | 69°F | 92°F | 79°F | 4.5" |
| September | 62°F | 86°F | 73°F | 3.8" |
| October | 50°F | 76°F | 62°F | 3.9" |
| November | 40°F | 65°F | 52°F | 3.6" |
| December | 36°F | 56°F | 45°F | 5.6" |
| Index | Summertown | Tennessee | National |
| Air quality index | 27 | 76 | 42 |
| Pollution index | 957,183 | 2,454,916 | 2,726,193 |
| Measurement | Total |
| Days measured | 330 |
| Days with good air quality | 306 |
| Days with moderate air quality | 24 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.010% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Ethridge, TN | 720 | 27 | 46.0% |
| Lawrenceburg, TN | 10,925 | 27 | 46.0% |
| Hohenwald, TN | 3,744 | 27 | 46.0% |
| Columbia, TN | 39,515 | 31 | 38.0% |
| Mount Pleasant, TN | 4,899 | 31 | 38.0% |
| Summertown, TN | 521 | 27 | 46.0% |
| City | Population | Air Quality Index | National Avg. |
| McArthur, CA | 521 | 42 | 16.0% |
| Hampton, FL | 521 | 35 | 30.0% |
| Seymour, IA | 521 | 39 | 22.0% |
| Golf, IL | 521 | 55 | 10.0% |
| Sun, LA | 521 | 30 | 40.0% |
| Summertown, TN | 521 | 27 | 46.0% |
Here are the best places to live in Tennessee
These are the 10 most affordable cities in Tennessee
Check out the 10 safest cities in Tennessee
Top 10 best public schools in Summertown