| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 19°F | 35°F | 27°F | 2.2" |
| February | 19°F | 37°F | 27°F | 2.0" |
| March | 30°F | 50°F | 39°F | 3.1" |
| April | 40°F | 64°F | 51°F | 3.5" |
| May | 51°F | 74°F | 62°F | 4.2" |
| June | 60°F | 82°F | 70°F | 5.2" |
| July | 62°F | 84°F | 73°F | 4.0" |
| August | 60°F | 83°F | 71°F | 3.4" |
| September | 53°F | 77°F | 64°F | 3.4" |
| October | 43°F | 65°F | 53°F | 3.4" |
| November | 32°F | 52°F | 42°F | 2.6" |
| December | 25°F | 41°F | 32°F | 3.0" |
| Index | Oceola | Ohio | National |
| Air quality index | 41 | 40 | 42 |
| Pollution index | 1,197,810 | 4,472,386 | 2,726,193 |
| Measurement | Total |
| Days measured | 245 |
| Days with good air quality | 218 |
| Days with moderate air quality | 27 |
| 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 | 0.001% |
| Lead | 0.010% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Sycamore, OH | 740 | 39 | 22.0% |
| McCutchenville, OH | 211 | 39 | 22.0% |
| Upper Sandusky, OH | 6,609 | 39 | 22.0% |
| Harpster, OH | 254 | 39 | 22.0% |
| New Riegel, OH | 329 | 40 | 20.0% |
| Oceola, OH | 182 | 41 | 18.0% |
| City | Population | Air Quality Index | National Avg. |
| Fort Green, FL | 182 | 36 | 28.0% |
| Green Mountain, IA | 182 | 39 | 22.0% |
| St. Marys, IA | 182 | 39 | 22.0% |
| Berlin, IL | 182 | 40 | 20.0% |
| Minden City, MI | 182 | 26 | 48.0% |
| Oceola, OH | 182 | 41 | 18.0% |
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