| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 24°F | 39°F | 31°F | 7.7" |
| February | 18°F | 35°F | 26°F | 2.3" |
| March | 29°F | 50°F | 39°F | 4.6" |
| April | 37°F | 62°F | 49°F | 7.9" |
| May | 45°F | 73°F | 59°F | 4.7" |
| June | 57°F | 83°F | 70°F | 2.9" |
| July | 61°F | 84°F | 72°F | 6.2" |
| August | 63°F | 84°F | 73°F | 7.9" |
| September | 53°F | 80°F | 65°F | 3.3" |
| October | 46°F | 68°F | 56°F | 4.1" |
| November | 33°F | 55°F | 44°F | 4.0" |
| December | 25°F | 40°F | 32°F | 4.1" |
| Index | Summitville | 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. |
| Bergholz, OH | 636 | 6 | 88.0% |
| Wellsville, OH | 3,336 | 6 | 88.0% |
| Lisbon, OH | 2,671 | 6 | 88.0% |
| Glenmoor, OH | 1,713 | 6 | 88.0% |
| New Waterford, OH | 881 | 6 | 88.0% |
| Summitville, OH | 210 | 6 | 88.0% |
| City | Population | Air Quality Index | National Avg. |
| Cantwell, AK | 210 | 38 | 24.0% |
| Shungnak, AK | 210 | 38 | 24.0% |
| White Hills, AZ | 210 | 54 | 8.0% |
| Monson, CA | 210 | 66 | 32.0% |
| Point Reyes Station, CA | 210 | 34 | 32.0% |
| Summitville, OH | 210 | 6 | 88.0% |
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