| 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 | Capitol | Madison | Wisconsin |
| Air quality index | 39 | 39 | 69 |
| Pollution index | 1,728,820 | 1,728,820 | 2,842,418 |
| 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. |
| Cottage Grove, WI | 7,086 | 39 | 22.0% |
| Belleville, WI | 2,682 | 39 | 22.0% |
| Middleton, WI | 19,764 | 39 | 22.0% |
| Stoughton, WI | 13,146 | 39 | 22.0% |
| Cross Plains, WI | 4,234 | 39 | 22.0% |
| Madison, WI | 258,366 | 39 | 22.0% |
| City | Population | Air Quality Index | National Avg. |
| Burnaby, BC | 258,827 | n/a | |
| Kitchener, ON | 259,162 | n/a | |
| Chandler, AZ | 257,076 | 74 | 48.0% |
| Lubbock, TX | 257,013 | 25 | 50.0% |
| Laredo, TX | 260,571 | 41 | 18.0% |
| Madison, WI | 258,366 | 39 | 22.0% |
Here are the best places to live in Wisconsin
These are the 10 cheapest cities in Wisconsin
See the best places to live in Madison
Check out the 10 most dangerous cities in Wisconsin