| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 23°F | 36°F | 29°F | 5.8" |
| February | 17°F | 32°F | 25°F | 2.4" |
| March | 28°F | 47°F | 36°F | 3.5" |
| April | 38°F | 58°F | 48°F | 6.9" |
| May | 47°F | 71°F | 59°F | 2.1" |
| June | 60°F | 83°F | 71°F | 4.1" |
| July | 61°F | 84°F | 72°F | 6.2" |
| August | 62°F | 83°F | 72°F | 13.1" |
| September | 55°F | 78°F | 66°F | 4.6" |
| October | 48°F | 66°F | 56°F | 4.3" |
| November | 33°F | 52°F | 43°F | 4.5" |
| December | 23°F | 36°F | 29°F | 3.6" |
| Index | Sheffield Lake | Ohio | National |
| Air quality index | 50 | 40 | 42 |
| Pollution index | 10,021,400 | 4,472,386 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 185 |
| Days with moderate air quality | 173 |
| Days w/ poor A.Q. for sensitive groups | 7 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.010% |
| Benzene | 0.150% |
| Carbon Tetrachloride | 0.030% |
| Lead | 0.040% |
| Mercury | 0.030% |
| City | Population | Air Quality Index | National Avg. |
| Elyria, OH | 55,802 | 50 | = 100 |
| Eaton Estates, OH | 1,234 | 50 | = 100 |
| Fairview Park, OH | 16,727 | 50 | = 100 |
| Middleburg Heights, OH | 15,913 | 50 | = 100 |
| Brook Park, OH | 19,070 | 50 | = 100 |
| Sheffield Lake, OH | 9,354 | 50 | = 100 |
| City | Population | Air Quality Index | National Avg. |
| Ladysmith, BC | 9,354 | n/a | |
| University of California-Davis, CA | 9,351 | 52 | 4.0% |
| Lincoln City, OR | 9,358 | 17 | 66.0% |
| Ogden, NC | 9,359 | 34 | 32.0% |
| Amherst, NS | 9,360 | n/a | |
| Sheffield Lake, OH | 9,354 | 50 | = 100 |