| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 24°F | 42°F | 32°F | 3.4" |
| February | 25°F | 44°F | 33°F | 2.6" |
| March | 34°F | 56°F | 44°F | 3.9" |
| April | 43°F | 69°F | 56°F | 4.2" |
| May | 52°F | 76°F | 63°F | 4.1" |
| June | 60°F | 83°F | 71°F | 4.9" |
| July | 64°F | 85°F | 74°F | 4.8" |
| August | 63°F | 86°F | 73°F | 3.6" |
| September | 56°F | 80°F | 67°F | 3.2" |
| October | 45°F | 68°F | 55°F | 3.7" |
| November | 35°F | 57°F | 45°F | 2.9" |
| December | 29°F | 46°F | 37°F | 4.2" |
| Index | Chesterhill | Ohio | National |
| Air quality index | 25 | 40 | 42 |
| Pollution index | 874,439 | 4,472,386 | 2,726,193 |
| Measurement | Total |
| Days measured | 120 |
| Days with good air quality | 116 |
| Days with moderate air quality | 4 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.002% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.010% |
| Mercury | 0.010% |
| City | Population | Air Quality Index | National Avg. |
| Chauncey, OH | 840 | 25 | 50.0% |
| McConnelsville, OH | 2,456 | 25 | 50.0% |
| Millfield, OH | 293 | 25 | 50.0% |
| Rendville, OH | 59 | 25 | 50.0% |
| Glouster, OH | 1,626 | 25 | 50.0% |
| Chesterhill, OH | 360 | 25 | 50.0% |
| City | Population | Air Quality Index | National Avg. |
| Kipnuk, AK | 360 | 31 | 38.0% |
| Muir Beach, CA | 360 | 40 | 20.0% |
| Fisher Island, FL | 360 | 41 | 18.0% |
| Worthington, IA | 360 | 29 | 42.0% |
| Malta, ID | 360 | 20 | 60.0% |
| Chesterhill, OH | 360 | 25 | 50.0% |
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