| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 20°F | 37°F | 28°F | 3.3" |
| February | 20°F | 38°F | 28°F | 3.0" |
| March | 29°F | 49°F | 38°F | 3.2" |
| April | 39°F | 63°F | 51°F | 3.8" |
| May | 50°F | 73°F | 61°F | 3.7" |
| June | 60°F | 82°F | 71°F | 4.5" |
| July | 63°F | 85°F | 74°F | 4.5" |
| August | 62°F | 84°F | 73°F | 4.4" |
| September | 56°F | 77°F | 66°F | 4.2" |
| October | 45°F | 66°F | 55°F | 4.5" |
| November | 35°F | 54°F | 44°F | 3.4" |
| December | 26°F | 41°F | 33°F | 3.5" |
| Index | Rocky River | 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. |
| Bratenahl, OH | 1,489 | 50 | = 100 |
| Cleveland, OH | 391,340 | 50 | = 100 |
| Bay Village, OH | 15,639 | 50 | = 100 |
| Broadview Heights, OH | 19,835 | 50 | = 100 |
| Avon, OH | 23,911 | 50 | = 100 |
| Rocky River, OH | 20,753 | 50 | = 100 |
| City | Population | Air Quality Index | National Avg. |
| Ferndale, MI | 20,749 | 56 | 12.0% |
| Sainte-Marthe-sur-le-Lac, QC | 20,759 | n/a | |
| West Chester, PA | 20,746 | 51 | 2.0% |
| Tullahoma, TN | 20,737 | 31 | 38.0% |
| Kinston, NC | 20,770 | 42 | 16.0% |
| Rocky River, OH | 20,753 | 50 | = 100 |