| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 14°F | 28°F | 21°F | 1.7" |
| February | 16°F | 30°F | 23°F | 2.3" |
| March | 29°F | 46°F | 36°F | 2.7" |
| April | 39°F | 59°F | 48°F | 4.4" |
| May | 50°F | 71°F | 60°F | 4.6" |
| June | 60°F | 79°F | 69°F | 9.5" |
| July | 64°F | 82°F | 72°F | 7.7" |
| August | 62°F | 80°F | 71°F | 6.1" |
| September | 54°F | 74°F | 63°F | 4.2" |
| October | 43°F | 61°F | 51°F | 4.4" |
| November | 32°F | 47°F | 38°F | 3.3" |
| December | 20°F | 32°F | 26°F | 1.1" |
| Index | Brodhead | Wisconsin | National |
| Air quality index | 38 | 69 | 42 |
| Pollution index | 145,178 | 2,842,418 | 2,726,193 |
| Measurement | Total |
| Days measured | 203 |
| Days with good air quality | 185 |
| Days with moderate air quality | 18 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Juda, WI | 322 | 38 | 24.0% |
| Evansville, WI | 5,374 | 38 | 24.0% |
| Orfordville, WI | 1,450 | 38 | 24.0% |
| Albany, WI | 1,084 | 38 | 24.0% |
| Footville, WI | 1,018 | 38 | 24.0% |
| Brodhead, WI | 3,211 | 38 | 24.0% |
| City | Population | Air Quality Index | National Avg. |
| East Dundee, IL | 3,211 | 55 | 10.0% |
| Clarence Center, NY | 3,211 | 39 | 22.0% |
| Ingram, PA | 3,210 | 56 | 12.0% |
| Heyworth, IL | 3,212 | 44 | 12.0% |
| Iowa, LA | 3,209 | 45 | 10.0% |
| Brodhead, WI | 3,211 | 38 | 24.0% |
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