| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 24°F | 45°F | 34°F | 5.4" |
| February | 24°F | 46°F | 34°F | 7.3" |
| March | 33°F | 56°F | 44°F | 6.8" |
| April | 47°F | 71°F | 58°F | 9.8" |
| May | 55°F | 80°F | 67°F | 9.3" |
| June | 63°F | 86°F | 74°F | 5.5" |
| July | 63°F | 86°F | 74°F | 7.5" |
| August | 65°F | 86°F | 74°F | 10.4" |
| September | 57°F | 83°F | 68°F | 6.5" |
| October | 47°F | 70°F | 57°F | 5.4" |
| November | 31°F | 54°F | 42°F | 6.2" |
| December | 32°F | 50°F | 40°F | 8.2" |
| Index | Celina | Tennessee | National |
| Air quality index | 25 | 76 | 42 |
| Pollution index | 487,905 | 2,454,916 | 2,726,193 |
| Measurement | Total |
| Days measured | 360 |
| Days with good air quality | 351 |
| Days with moderate air quality | 9 |
| 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 | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Gainesboro, TN | 986 | 25 | 50.0% |
| Livingston, TN | 4,058 | 25 | 50.0% |
| Tompkinsville, KY | 2,748 | 25 | 50.0% |
| Celina, TN | 1,995 | 25 | 50.0% |
| City | Population | Air Quality Index | National Avg. |
| Hurstbourne Acres, KY | 1,995 | 49 | 2.0% |
| Warsaw, KY | 1,995 | 54 | 8.0% |
| Valencia, NM | 1,995 | 53 | 6.0% |
| Churchill, OH | 1,995 | 42 | 16.0% |
| Elida, OH | 1,995 | 39 | 22.0% |
| Celina, TN | 1,995 | 25 | 50.0% |
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