| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 20°F | 35°F | 27°F | 2.2" |
| February | 18°F | 35°F | 26°F | 2.0" |
| March | 27°F | 46°F | 36°F | 2.8" |
| April | 37°F | 60°F | 48°F | 2.9" |
| May | 48°F | 71°F | 59°F | 3.7" |
| June | 56°F | 78°F | 67°F | 4.3" |
| July | 60°F | 82°F | 71°F | 4.9" |
| August | 59°F | 80°F | 69°F | 4.1" |
| September | 53°F | 74°F | 63°F | 4.3" |
| October | 44°F | 63°F | 52°F | 4.8" |
| November | 34°F | 51°F | 42°F | 3.3" |
| December | 26°F | 40°F | 33°F | 3.1" |
| Index | Andover | Ohio | National |
| Air quality index | 34 | 40 | 42 |
| Pollution index | 3,205,550 | 4,472,386 | 2,726,193 |
| Measurement | Total |
| Days measured | 358 |
| Days with good air quality | 334 |
| Days with moderate air quality | 23 |
| Days w/ poor A.Q. for sensitive groups | 1 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.010% |
| Benzene | 0.040% |
| Carbon Tetrachloride | 0.010% |
| Lead | 0.170% |
| Mercury | 0.005% |
| City | Population | Air Quality Index | National Avg. |
| Roaming Shores, OH | 1,625 | 34 | 32.0% |
| Linesville, PA | 1,113 | 34 | 32.0% |
| Conneautville, PA | 764 | 34 | 32.0% |
| Orwell, OH | 1,862 | 34 | 32.0% |
| Rock Creek, OH | 511 | 34 | 32.0% |
| Andover, OH | 549 | 34 | 32.0% |
| City | Population | Air Quality Index | National Avg. |
| Leslie, AR | 549 | 36 | 28.0% |
| Smelterville, ID | 549 | 43 | 14.0% |
| St. Leonard, MD | 549 | 41 | 18.0% |
| Terry, MT | 549 | 33 | 34.0% |
| Deercroft, NC | 549 | 41 | 18.0% |
| Andover, OH | 549 | 34 | 32.0% |
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