| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 19°F | 37°F | 27°F | 3.1" |
| February | 19°F | 38°F | 28°F | 2.7" |
| March | 28°F | 50°F | 38°F | 3.6" |
| April | 39°F | 65°F | 51°F | 3.6" |
| May | 49°F | 74°F | 61°F | 4.0" |
| June | 58°F | 82°F | 70°F | 5.4" |
| July | 62°F | 85°F | 73°F | 4.5" |
| August | 61°F | 84°F | 72°F | 3.8" |
| September | 54°F | 78°F | 65°F | 3.6" |
| October | 43°F | 65°F | 53°F | 4.2" |
| November | 32°F | 53°F | 42°F | 3.3" |
| December | 25°F | 41°F | 32°F | 3.5" |
| Index | Hanoverton | Ohio | National |
| Air quality index | 6 | 40 | 42 |
| Pollution index | 2,559,460 | 4,472,386 | 2,726,193 |
| Measurement | Total |
| Days measured | 354 |
| Days with good air quality | 353 |
| Days with moderate air quality | 1 |
| Days w/ poor A.Q. for sensitive groups | |
| Days with unhealthy air quality |
| Pollutant | Total |
| Arsenic | 0.005% |
| Benzene | 0.030% |
| Carbon Tetrachloride | 0.030% |
| Lead | 0.060% |
| Mercury | 0.050% |
| City | Population | Air Quality Index | National Avg. |
| Wellsville, OH | 3,336 | 6 | 88.0% |
| Lisbon, OH | 2,671 | 6 | 88.0% |
| Irondale, OH | 389 | 6 | 88.0% |
| Salineville, OH | 1,124 | 6 | 88.0% |
| Summitville, OH | 210 | 6 | 88.0% |
| Hanoverton, OH | 310 | 6 | 88.0% |
| City | Population | Air Quality Index | National Avg. |
| Campbell Station, AR | 310 | 45 | 10.0% |
| Floyd, IA | 310 | 15 | 70.0% |
| Holy Cross, IA | 310 | 29 | 42.0% |
| Elliott, IL | 310 | 42 | 16.0% |
| Walloon Lake, MI | 310 | 36 | 28.0% |
| Hanoverton, OH | 310 | 6 | 88.0% |
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