| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 20°F | 37°F | 28°F | 3.9" |
| February | 18°F | 39°F | 28°F | 2.3" |
| March | 28°F | 48°F | 37°F | 4.1" |
| April | 36°F | 61°F | 48°F | 3.2" |
| May | 47°F | 70°F | 58°F | 4.6" |
| June | 56°F | 78°F | 66°F | 5.8" |
| July | 60°F | 80°F | 71°F | 2.9" |
| August | 61°F | 81°F | 71°F | 4.8" |
| September | 56°F | 77°F | 66°F | 10.0" |
| October | 46°F | 67°F | 56°F | 4.7" |
| November | 36°F | 55°F | 45°F | 4.0" |
| December | 27°F | 42°F | 34°F | 2.8" |
| Index | Painesville | Ohio | National |
| Air quality index | 34 | 40 | 42 |
| Pollution index | 3,855,270 | 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 | 0.003% |
| Benzene | 0.040% |
| Carbon Tetrachloride | 0.010% |
| Lead | 0.020% |
| Mercury | 0.001% |
| City | Population | Air Quality Index | National Avg. |
| Fairport Harbor, OH | 3,067 | 34 | 32.0% |
| North Madison, OH | 8,685 | 34 | 32.0% |
| Grand River, OH | 604 | 34 | 32.0% |
| North Perry, OH | 756 | 34 | 32.0% |
| Madison, OH | 3,166 | 34 | 32.0% |
| Painesville, OH | 19,817 | 34 | 32.0% |
| City | Population | Air Quality Index | National Avg. |
| Mililani Mauka, HI | 19,808 | 30 | 40.0% |
| West St. Paul, MN | 19,805 | 46 | 8.0% |
| Belle Glade, FL | 19,829 | 36 | 28.0% |
| Hunters Creek, FL | 19,833 | 39 | 22.0% |
| Colwood, BC | 19,837 | n/a | |
| Painesville, OH | 19,817 | 34 | 32.0% |
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