| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 6°F | 25°F | 15°F | 1.9" |
| February | 11°F | 30°F | 20°F | 0.6" |
| March | 22°F | 44°F | 32°F | 3.2" |
| April | 34°F | 57°F | 44°F | 5.0" |
| May | 45°F | 72°F | 58°F | 3.2" |
| June | 56°F | 81°F | 68°F | 5.3" |
| July | 59°F | 85°F | 71°F | 7.2" |
| August | 57°F | 82°F | 69°F | 6.8" |
| September | 47°F | 74°F | 59°F | 3.5" |
| October | 37°F | 61°F | 48°F | 4.7" |
| November | 27°F | 47°F | 36°F | 2.5" |
| December | 12°F | 30°F | 20°F | 1.3" |
| Index | Montello | Wisconsin | National |
| Air quality index | 35 | 69 | 42 |
| Pollution index | 1,519,720 | 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 | 0.001% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Oxford, WI | 542 | 35 | 30.0% |
| Westfield, WI | 1,256 | 35 | 30.0% |
| Endeavor, WI | 562 | 35 | 30.0% |
| Packwaukee, WI | 194 | 35 | 30.0% |
| Kingston, WI | 364 | 40 | 20.0% |
| Montello, WI | 1,439 | 35 | 30.0% |
| City | Population | Air Quality Index | National Avg. |
| Rolling Hills, CA | 1,439 | 72 | 44.0% |
| Glencoe, FL | 1,439 | 37 | 26.0% |
| Rome City, IN | 1,439 | 45 | 10.0% |
| Dickson, OK | 1,439 | 43 | 14.0% |
| Laflin, PA | 1,439 | 38 | 24.0% |
| Montello, WI | 1,439 | 35 | 30.0% |
Here are the best places to live in Wisconsin
Check out the 10 safest cities in Wisconsin
These are the 10 most affordable cities in Wisconsin
10 best cities to buy a new house in Wisconsin