| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 9°F | 26°F | 18°F | 2.0" |
| February | 11°F | 30°F | 20°F | 1.8" |
| March | 24°F | 44°F | 34°F | 4.2" |
| April | 35°F | 58°F | 46°F | 6.4" |
| May | 45°F | 70°F | 58°F | 6.5" |
| June | 55°F | 78°F | 67°F | 8.0" |
| July | 58°F | 82°F | 71°F | 8.5" |
| August | 56°F | 80°F | 68°F | 8.2" |
| September | 48°F | 73°F | 60°F | 8.3" |
| October | 38°F | 60°F | 48°F | 5.1" |
| November | 27°F | 46°F | 36°F | 3.3" |
| December | 15°F | 31°F | 23°F | 3.0" |
| Index | Hillsboro | Wisconsin | National |
| Air quality index | 35 | 69 | 42 |
| Pollution index | 367,008 | 2,842,418 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 311 |
| Days with moderate air quality | 53 |
| Days w/ poor A.Q. for sensitive groups | 1 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.005% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.002% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Lime Ridge, WI | 186 | 35 | 30.0% |
| Norwalk, WI | 713 | 35 | 30.0% |
| Wilton, WI | 542 | 35 | 30.0% |
| Cazenovia, WI | 298 | 35 | 30.0% |
| Mauston, WI | 4,354 | 35 | 30.0% |
| Hillsboro, WI | 1,357 | 35 | 30.0% |
| City | Population | Air Quality Index | National Avg. |
| Dallesport, WA | 1,357 | 23 | 54.0% |
| Edgar, WI | 1,357 | 34 | 32.0% |
| Ohatchee, AL | 1,358 | 43 | 14.0% |
| Cactus Flats, AZ | 1,356 | 47 | 6.0% |
| Greenville, FL | 1,358 | 35 | 30.0% |
| Hillsboro, WI | 1,357 | 35 | 30.0% |
Here are the best places to live in Wisconsin
Check out the 10 most dangerous cities in Wisconsin
These are the largest cities in Wisconsin
See the best places to live in Hillsboro