| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 22°F | 37°F | 29°F | 11.1" |
| February | 17°F | 32°F | 25°F | 2.6" |
| March | 31°F | 50°F | 39°F | 6.7" |
| April | 39°F | 62°F | 50°F | 7.1" |
| May | 48°F | 74°F | 61°F | 1.6" |
| June | 61°F | 85°F | 73°F | 5.4" |
| July | 61°F | 84°F | 73°F | 5.5" |
| August | 63°F | 86°F | 74°F | 10.2" |
| September | 56°F | 79°F | 67°F | 5.9" |
| October | 47°F | 67°F | 57°F | 3.2" |
| November | 33°F | 52°F | 43°F | 5.1" |
| December | 22°F | 36°F | 29°F | 3.3" |
| Index | Uniopolis | Ohio | National |
| Air quality index | 39 | 40 | 42 |
| Pollution index | 750,178 | 4,472,386 | 2,726,193 |
| Measurement | Total |
| Days measured | 364 |
| Days with good air quality | 303 |
| Days with moderate air quality | 61 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.001% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.002% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Anna, OH | 1,608 | 39 | 22.0% |
| Jackson Center, OH | 1,575 | 39 | 22.0% |
| New Knoxville, OH | 1,125 | 39 | 22.0% |
| Cridersville, OH | 1,976 | 39 | 22.0% |
| Lafayette CDP, OH | 256 | 39 | 22.0% |
| Uniopolis, OH | 315 | 39 | 22.0% |
| City | Population | Air Quality Index | National Avg. |
| Woodville, GA | 315 | 44 | 12.0% |
| Frederika, IA | 315 | 39 | 22.0% |
| Wingate, IN | 315 | 42 | 16.0% |
| Wetmore, KS | 315 | 41 | 18.0% |
| Fife Lake, MI | 315 | 36 | 28.0% |
| Uniopolis, OH | 315 | 39 | 22.0% |
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