| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 32°F | 49°F | 39°F | 7.7" |
| February | 33°F | 50°F | 40°F | 4.5" |
| March | 43°F | 63°F | 52°F | 7.4" |
| April | 52°F | 73°F | 62°F | 8.3" |
| May | 60°F | 81°F | 70°F | 8.4" |
| June | 69°F | 90°F | 79°F | 7.5" |
| July | 70°F | 90°F | 79°F | 6.1" |
| August | 70°F | 91°F | 79°F | 4.3" |
| September | 63°F | 84°F | 72°F | 5.8" |
| October | 50°F | 73°F | 60°F | 7.7" |
| November | 41°F | 61°F | 50°F | 7.0" |
| December | 35°F | 51°F | 42°F | 7.8" |
| Index | Halls | Tennessee | National |
| Air quality index | 26 | 76 | 42 |
| Pollution index | 2,081,500 | 2,454,916 | 2,726,193 |
| Measurement | Total |
| Days measured | 360 |
| Days with good air quality | 341 |
| Days with moderate air quality | 19 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.001% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.010% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Friendship, TN | 705 | 26 | 48.0% |
| Henning, TN | 1,177 | 26 | 48.0% |
| Gates, TN | 489 | 26 | 48.0% |
| Ripley, TN | 7,852 | 26 | 48.0% |
| Maury City, TN | 817 | 26 | 48.0% |
| Halls, TN | 9,135 | 26 | 48.0% |
| City | Population | Air Quality Index | National Avg. |
| Economy, PA | 9,133 | 56 | 12.0% |
| Stoneham-et-Tewkesbury, QC | 9,130 | n/a | |
| Grosse Pointe Farms, MI | 9,142 | 56 | 12.0% |
| Warren, PA | 9,127 | 9 | 82.0% |
| Highland Park, TX | 9,143 | 51 | 2.0% |
| Halls, TN | 9,135 | 26 | 48.0% |
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