| 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 | Avon | 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. |
| Westlake, OH | 32,154 | 50 | = 100 |
| Parma, OH | 78,623 | 50 | = 100 |
| North Olmsted, OH | 31,562 | 50 | = 100 |
| Berea, OH | 18,713 | 50 | = 100 |
| Avon Lake, OH | 24,309 | 50 | = 100 |
| Avon, OH | 23,233 | 50 | = 100 |
| City | Population | Air Quality Index | National Avg. |
| Roseburg, OR | 23,237 | 24 | 52.0% |
| Rock Springs, WY | 23,238 | 46 | 8.0% |
| Cottage Lake, WA | 23,239 | 45 | 10.0% |
| Greenbelt, MD | 23,253 | 47 | 6.0% |
| East Hants, NS | 23,212 | n/a | |
| Avon, OH | 23,233 | 50 | = 100 |
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