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| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 22°F | 41°F | 31°F | 2.7" |
| February | 22°F | 43°F | 32°F | 2.6" |
| March | 33°F | 57°F | 44°F | 4.4" |
| April | 43°F | 69°F | 55°F | 5.1" |
| May | 52°F | 77°F | 64°F | 4.4" |
| June | 61°F | 85°F | 73°F | 4.7" |
| July | 64°F | 87°F | 75°F | 3.7" |
| August | 62°F | 87°F | 74°F | 2.8" |
| September | 55°F | 81°F | 67°F | 3.8" |
| October | 43°F | 69°F | 55°F | 3.8" |
| November | 32°F | 57°F | 43°F | 3.1" |
| December | 27°F | 46°F | 36°F | 4.1" |
| Index | Northbrook | Ohio | National |
| Air quality index | 54 | 40 | 42 |
| Pollution index | 7,300,490 | 4,472,386 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 139 |
| Days with moderate air quality | 206 |
| Days w/ poor A.Q. for sensitive groups | 20 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.520% |
| Benzene | 0.070% |
| Carbon Tetrachloride | 0.040% |
| Lead | 0.240% |
| Mercury | 0.050% |
| City | Population | Air Quality Index | National Avg. |
| Deer Park, OH | 5,561 | 54 | 8.0% |
| Grandview, OH | 1,122 | 54 | 8.0% |
| Monfort Heights, OH | 13,124 | 54 | 8.0% |
| Terrace Park, OH | 2,254 | 54 | 8.0% |
| Dayton, KY | 5,550 | 54 | 8.0% |
| Northbrook, OH | 10,744 | 54 | 8.0% |
| City | Population | Air Quality Index | National Avg. |
| Waipio, HI | 10,745 | 30 | 40.0% |
| Sainte-Julienne, QC | 10,741 | n/a | |
| Fox Lake, IL | 10,739 | 39 | 22.0% |
| Fairfield, AL | 10,749 | 53 | 6.0% |
| Batesville, AR | 10,749 | 45 | 10.0% |
| Northbrook, OH | 10,744 | 54 | 8.0% |
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