| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 14°F | 31°F | 22°F | 2.9" |
| February | 18°F | 35°F | 26°F | 1.6" |
| March | 30°F | 49°F | 38°F | 2.6" |
| April | 38°F | 61°F | 48°F | 5.8" |
| May | 50°F | 74°F | 61°F | 5.4" |
| June | 59°F | 83°F | 71°F | 6.3" |
| July | 66°F | 90°F | 78°F | 3.9" |
| August | 61°F | 85°F | 72°F | 5.2" |
| September | 51°F | 74°F | 62°F | 2.8" |
| October | 40°F | 63°F | 51°F | 8.9" |
| November | 33°F | 51°F | 41°F | 2.9" |
| December | 20°F | 35°F | 27°F | 3.2" |
| Index | Brooklyn | Wisconsin | National |
| Air quality index | 39 | 69 | 42 |
| Pollution index | 1,728,820 | 2,842,418 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 285 |
| Days with moderate air quality | 80 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.003% |
| Benzene | 0.030% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.001% |
| Mercury | 0.002% |
| City | Population | Air Quality Index | National Avg. |
| Albany, WI | 1,084 | 38 | 24.0% |
| Evansville, WI | 5,374 | 38 | 24.0% |
| Footville, WI | 1,018 | 38 | 24.0% |
| Hanover, WI | 119 | 38 | 24.0% |
| Belleville, WI | 2,682 | 39 | 22.0% |
| Brooklyn, WI | 1,212 | 39 | 22.0% |
| City | Population | Air Quality Index | National Avg. |
| Springville, IA | 1,212 | 39 | 22.0% |
| Schoolcraft, MI | 1,212 | 38 | 24.0% |
| Whitaker, PA | 1,212 | 56 | 12.0% |
| Moose Jaw No. 161, SK | 1,212 | n/a | |
| Yosemite Valley, CA | 1,213 | 39 | 22.0% |
| Brooklyn, WI | 1,212 | 39 | 22.0% |
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