| 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 | Parma | Ohio | National |
| Air quality index | 50 | 40 | 42 |
| Pollution index | 28,421,300 | 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 | 0.220% |
| Benzene | 0.280% |
| Carbon Tetrachloride | 0.170% |
| Lead | 0.250% |
| Mercury | 0.090% |
| City | Population | Air Quality Index | National Avg. |
| Peninsula, OH | 654 | 43 | 14.0% |
| Twinsburg Heights, OH | 787 | 43 | 14.0% |
| Richfield, OH | 3,767 | 43 | 14.0% |
| Hudson, OH | 22,249 | 43 | 14.0% |
| Boston Heights, OH | 1,194 | 43 | 14.0% |
| Parma, OH | 78,623 | 50 | = 100 |
| City | Population | Air Quality Index | National Avg. |
| Pharr, TX | 78,689 | 42 | 16.0% |
| Flower Mound, TX | 78,854 | 51 | 2.0% |
| Plymouth, MN | 78,879 | 46 | 8.0% |
| Napa, CA | 78,294 | 35 | 30.0% |
| Drummondville, QC | 79,029 | n/a | |
| Parma, OH | 78,623 | 50 | = 100 |
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