| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 24°F | 42°F | 32°F | 2.7" |
| February | 24°F | 44°F | 34°F | 2.6" |
| March | 34°F | 57°F | 44°F | 4.1" |
| April | 43°F | 69°F | 56°F | 4.9" |
| May | 52°F | 77°F | 64°F | 3.9" |
| June | 61°F | 85°F | 73°F | 4.5" |
| July | 65°F | 87°F | 75°F | 4.7" |
| August | 63°F | 87°F | 75°F | 2.7" |
| September | 56°F | 81°F | 67°F | 3.3" |
| October | 45°F | 69°F | 56°F | 3.6" |
| November | 33°F | 57°F | 44°F | 2.9" |
| December | 28°F | 46°F | 36°F | 3.7" |
| Index | Dillonvale | Ohio | National |
| Air quality index | 54 | 40 | 42 |
| Pollution index | 7,300,490 | 4,472,386 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 139 |
| Days with moderate air quality | 206 |
| Days w/ poor A.Q. for sensitive groups | 20 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.520% |
| Benzene | 0.070% |
| Carbon Tetrachloride | 0.040% |
| Lead | 0.240% |
| Mercury | 0.050% |
| City | Population | Air Quality Index | National Avg. |
| Lebanon, OH | 20,781 | 43 | 14.0% |
| Hamilton, OH | 62,162 | 54 | 8.0% |
| Evendale, OH | 2,709 | 54 | 8.0% |
| Northbrook, OH | 10,744 | 54 | 8.0% |
| Goshen, OH | 652 | 54 | 8.0% |
| Dillonvale, OH | 3,411 | 54 | 8.0% |
| City | Population | Air Quality Index | National Avg. |
| Smithville-Sanders, IN | 3,411 | 42 | 16.0% |
| Three Lakes, WA | 3,411 | 45 | 10.0% |
| Eagle Grove, IA | 3,410 | 37 | 26.0% |
| Alma, GA | 3,409 | 26 | 48.0% |
| Minden, NV | 3,409 | 13 | 74.0% |
| Dillonvale, OH | 3,411 | 54 | 8.0% |
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