| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 31°F | 51°F | 40°F | 4.1" |
| February | 33°F | 53°F | 42°F | 3.4" |
| March | 41°F | 65°F | 52°F | 5.8" |
| April | 50°F | 74°F | 62°F | 5.8" |
| May | 58°F | 81°F | 69°F | 6.0" |
| June | 67°F | 89°F | 77°F | 4.8" |
| July | 69°F | 91°F | 79°F | 4.2" |
| August | 68°F | 91°F | 79°F | 3.0" |
| September | 61°F | 85°F | 72°F | 3.6" |
| October | 48°F | 74°F | 60°F | 3.5" |
| November | 39°F | 63°F | 50°F | 4.0" |
| December | 34°F | 53°F | 43°F | 5.5" |
| Index | La Grange | Tennessee | National |
| Air quality index | 45 | 76 | 42 |
| Pollution index | 752,278 | 2,454,916 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 221 |
| Days with moderate air quality | 139 |
| Days w/ poor A.Q. for sensitive groups | 5 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.040% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.003% |
| Lead | 0.100% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Saulsbury, TN | 250 | 27 | 46.0% |
| Hickory Valley, TN | 86 | 27 | 46.0% |
| Ashland, MS | 492 | 39 | 22.0% |
| Moscow, TN | 747 | 45 | 10.0% |
| Grand Junction, TN | 388 | 45 | 10.0% |
| La Grange, TN | 102 | 45 | 10.0% |
| City | Population | Air Quality Index | National Avg. |
| St. George, AK | 102 | 31 | 38.0% |
| Kingvale, CA | 102 | 44 | 12.0% |
| Mount Laguna, CA | 102 | 64 | 28.0% |
| Phillipsville, CA | 102 | 27 | 46.0% |
| Hull, GA | 102 | 44 | 12.0% |
| La Grange, TN | 102 | 45 | 10.0% |
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