| 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 | West Manchester | Ohio | National |
| Air quality index | 6 | 40 | 42 |
| Pollution index | 1,369,080 | 4,472,386 | 2,726,193 |
| Measurement | Total |
| Days measured | 364 |
| Days with good air quality | 364 |
| Days with moderate air quality | |
| Days w/ poor A.Q. for sensitive groups | |
| Days with unhealthy air quality |
| Pollutant | Total |
| Arsenic | 0.001% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.002% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Castine, OH | 141 | 6 | 88.0% |
| New Paris, OH | 1,449 | 6 | 88.0% |
| Hollansburg, OH | 282 | 6 | 88.0% |
| Lake Lakengren, OH | 3,506 | 6 | 88.0% |
| Eldorado, OH | 616 | 6 | 88.0% |
| West Manchester, OH | 359 | 6 | 88.0% |
| City | Population | Air Quality Index | National Avg. |
| Trinidad, CA | 359 | 27 | 46.0% |
| Bode, IA | 359 | 15 | 70.0% |
| Grand View, ID | 359 | 36 | 28.0% |
| Sedalia, KY | 359 | 44 | 12.0% |
| Garretts Mill, MD | 359 | 40 | 20.0% |
| West Manchester, OH | 359 | 6 | 88.0% |
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