| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 20°F | 38°F | 28°F | 3.4" |
| February | 20°F | 40°F | 30°F | 2.3" |
| March | 31°F | 53°F | 41°F | 4.0" |
| April | 41°F | 67°F | 53°F | 4.5" |
| May | 51°F | 75°F | 63°F | 4.1" |
| June | 61°F | 84°F | 72°F | 4.5" |
| July | 63°F | 85°F | 74°F | 4.3" |
| August | 62°F | 85°F | 73°F | 2.9" |
| September | 55°F | 79°F | 67°F | 4.3" |
| October | 44°F | 67°F | 55°F | 3.5" |
| November | 33°F | 55°F | 43°F | 3.1" |
| December | 25°F | 42°F | 33°F | 3.9" |
| Index | Versailles | Ohio | National |
| Air quality index | 47 | 40 | 42 |
| Pollution index | 1,662,340 | 4,472,386 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 213 |
| Days with moderate air quality | 152 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.003% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.003% |
| Lead | 0.030% |
| Mercury | 0.010% |
| City | Population | Air Quality Index | National Avg. |
| Greenville, OH | 12,743 | 6 | 88.0% |
| Wayne Lakes, OH | 834 | 6 | 88.0% |
| New Weston, OH | 67 | 6 | 88.0% |
| Burkettsville, OH | 249 | 6 | 88.0% |
| Ansonia, OH | 1,126 | 6 | 88.0% |
| Versailles, OH | 2,793 | 47 | 6.0% |
| City | Population | Air Quality Index | National Avg. |
| Lake City, GA | 2,794 | 52 | 4.0% |
| Sublimity, OR | 2,794 | 32 | 36.0% |
| Mosheim, TN | 2,794 | 44 | 12.0% |
| Village of Grosse Pointe Shores, MI | 2,791 | 56 | 12.0% |
| La Villa, TX | 2,791 | 42 | 16.0% |
| Versailles, OH | 2,793 | 47 | 6.0% |
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