| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 35°F | 50°F | 43°F | 11.1" |
| February | 38°F | 54°F | 46°F | 7.1" |
| March | 46°F | 65°F | 56°F | 6.7" |
| April | 54°F | 74°F | 65°F | 10.2" |
| May | 62°F | 81°F | 72°F | 7.9" |
| June | 71°F | 89°F | 81°F | 4.8" |
| July | 73°F | 90°F | 82°F | 5.6" |
| August | 72°F | 90°F | 82°F | 7.4" |
| September | 65°F | 84°F | 75°F | 33.9" |
| October | 54°F | 74°F | 64°F | 26.5" |
| November | 44°F | 63°F | 54°F | 11.0" |
| December | 39°F | 55°F | 47°F | 12.3" |
| Index | Petersburg | Tennessee | National |
| Air quality index | 31 | 76 | 42 |
| Pollution index | 2,130,950 | 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 | 0.000% |
| Benzene | 0.030% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.030% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Shelbyville, TN | 21,841 | 31 | 38.0% |
| Cornersville, TN | 1,574 | 31 | 38.0% |
| Lewisburg, TN | 12,150 | 31 | 38.0% |
| Fayetteville, TN | 7,046 | 44 | 12.0% |
| Petersburg, TN | 517 | 31 | 38.0% |
| City | Population | Air Quality Index | National Avg. |
| Garfield, AR | 517 | 44 | 12.0% |
| Mesquite Creek, AZ | 517 | 13 | 74.0% |
| Reddick, FL | 517 | 38 | 24.0% |
| Burt, IA | 517 | 15 | 70.0% |
| Fillmore, IN | 517 | 54 | 8.0% |
| Petersburg, TN | 517 | 31 | 38.0% |
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