| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 22°F | 38°F | 30°F | 2.9" |
| February | 23°F | 40°F | 30°F | 2.0" |
| March | 32°F | 52°F | 41°F | 3.5" |
| April | 42°F | 65°F | 53°F | 3.3" |
| May | 51°F | 73°F | 62°F | 4.2" |
| June | 59°F | 80°F | 69°F | 4.5" |
| July | 63°F | 84°F | 73°F | 3.6" |
| August | 62°F | 83°F | 72°F | 3.9" |
| September | 55°F | 77°F | 65°F | 3.3" |
| October | 45°F | 65°F | 54°F | 3.6" |
| November | 35°F | 54°F | 44°F | 2.6" |
| December | 27°F | 43°F | 34°F | 3.6" |
| Index | Bergholz | Ohio | National |
| Air quality index | 6 | 40 | 42 |
| Pollution index | 724,968 | 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 | 0.001% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.030% |
| Mercury | 0.001% |
| City | Population | Air Quality Index | National Avg. |
| Summitville, OH | 210 | 6 | 88.0% |
| Irondale, OH | 389 | 6 | 88.0% |
| Newell, WV | 1,274 | 6 | 88.0% |
| Stratton, OH | 353 | 6 | 88.0% |
| La Croft, OH | 1,048 | 6 | 88.0% |
| Bergholz, OH | 636 | 6 | 88.0% |
| City | Population | Air Quality Index | National Avg. |
| Joppa, AL | 636 | 44 | 12.0% |
| Hayden Lake, ID | 636 | 43 | 14.0% |
| Clearbrook, MN | 636 | 33 | 34.0% |
| Wheatland, MT | 636 | 25 | 50.0% |
| Pink Hill, NC | 636 | 42 | 16.0% |
| Bergholz, OH | 636 | 6 | 88.0% |
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