| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 15°F | 28°F | 21°F | 0.6" |
| February | 15°F | 29°F | 22°F | 2.8" |
| March | 27°F | 43°F | 34°F | 2.9" |
| April | 37°F | 55°F | 45°F | 3.1" |
| May | 47°F | 67°F | 56°F | 8.9" |
| June | 56°F | 76°F | 66°F | 19.6" |
| July | 61°F | 80°F | 70°F | 14.9" |
| August | 60°F | 78°F | 69°F | 2.3" |
| September | 53°F | 72°F | 61°F | 10.4" |
| October | 42°F | 59°F | 50°F | 6.6" |
| November | 31°F | 46°F | 38°F | 3.6" |
| December | 20°F | 32°F | 26°F | 1.8" |
| Index | Waukesha | Wisconsin | National |
| Air quality index | 44 | 69 | 42 |
| Pollution index | 9,584,430 | 2,842,418 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 254 |
| Days with moderate air quality | 108 |
| Days w/ poor A.Q. for sensitive groups | 3 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.010% |
| Benzene | 0.090% |
| Carbon Tetrachloride | 0.020% |
| Lead | 0.010% |
| Mercury | 0.020% |
| City | Population | Air Quality Index | National Avg. |
| Eagle, WI | 2,138 | 37 | 26.0% |
| Lac La Belle, WI | 249 | 37 | 26.0% |
| Nashotah, WI | 1,287 | 37 | 26.0% |
| Ashippun, WI | 1,027 | 37 | 26.0% |
| Oconomowoc, WI | 16,931 | 37 | 26.0% |
| Waukesha, WI | 72,419 | 44 | 12.0% |
| City | Population | Air Quality Index | National Avg. |
| Kissimmee, FL | 72,410 | 39 | 22.0% |
| New Britain, CT | 72,543 | 41 | 18.0% |
| Lafayette, IN | 72,556 | 42 | 16.0% |
| Albany, GA | 72,634 | 40 | 20.0% |
| Turlock, CA | 72,715 | 49 | 2.0% |
| Waukesha, WI | 72,419 | 44 | 12.0% |
Here are the best places to live in Wisconsin
Most Dangerous Cities In The US
Check out the 10 most dangerous cities in Wisconsin
These are the 10 cheapest cities in Wisconsin