| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 31°F | 48°F | 38°F | 4.8" |
| February | 32°F | 52°F | 41°F | 4.3" |
| March | 41°F | 63°F | 51°F | 6.5" |
| April | 48°F | 71°F | 59°F | 8.3" |
| May | 56°F | 78°F | 66°F | 10.7" |
| June | 64°F | 87°F | 75°F | 7.3" |
| July | 69°F | 90°F | 78°F | 11.5" |
| August | 66°F | 90°F | 77°F | 6.7" |
| September | 59°F | 83°F | 70°F | 9.7" |
| October | 47°F | 72°F | 59°F | 6.5" |
| November | 38°F | 61°F | 49°F | 8.4" |
| December | 32°F | 50°F | 40°F | 7.8" |
| Index | Lafayette | Tennessee | National |
| Air quality index | 43 | 76 | 42 |
| Pollution index | 313,664 | 2,454,916 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 268 |
| Days with moderate air quality | 97 |
| 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 | 0.001% |
| Lead | 0.003% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Red Boiling Springs, TN | 1,785 | 25 | 50.0% |
| Gamaliel, KY | 274 | 25 | 50.0% |
| Bransford, TN | 269 | 43 | 14.0% |
| Fountain Run, KY | 328 | 43 | 14.0% |
| Westmoreland, TN | 2,622 | 43 | 14.0% |
| Lafayette, TN | 5,239 | 43 | 14.0% |
| City | Population | Air Quality Index | National Avg. |
| Odessa, MO | 5,240 | 47 | 6.0% |
| Chain Lake, WA | 5,237 | 45 | 10.0% |
| Mocksville, NC | 5,241 | 40 | 20.0% |
| Elverta, CA | 5,235 | 52 | 4.0% |
| The Meadows, FL | 5,235 | 38 | 24.0% |
| Lafayette, TN | 5,239 | 43 | 14.0% |
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