| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 11°F | 30°F | 20°F | 1.0" |
| February | 12°F | 33°F | 22°F | 1.0" |
| March | 26°F | 49°F | 37°F | 2.0" |
| April | 37°F | 63°F | 49°F | 4.5" |
| May | 48°F | 74°F | 60°F | 3.5" |
| June | 58°F | 83°F | 70°F | 6.0" |
| July | 62°F | 86°F | 73°F | 4.7" |
| August | 60°F | 84°F | 71°F | 5.1" |
| September | 52°F | 77°F | 63°F | 2.6" |
| October | 40°F | 64°F | 51°F | 3.1" |
| November | 29°F | 50°F | 39°F | 1.6" |
| December | 17°F | 34°F | 25°F | 2.0" |
| Index | Fennimore | Wisconsin | National |
| Air quality index | 29 | 69 | 42 |
| Pollution index | 6,043,140 | 2,842,418 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 304 |
| Days with moderate air quality | 60 |
| Days w/ poor A.Q. for sensitive groups | 1 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.010% |
| Benzene | 0.070% |
| Carbon Tetrachloride | 0.010% |
| Lead | 0.020% |
| Mercury | 0.040% |
| City | Population | Air Quality Index | National Avg. |
| Rewey, WI | 279 | 29 | 42.0% |
| Livingston, WI | 531 | 29 | 42.0% |
| Wauzeka, WI | 671 | 29 | 42.0% |
| Boscobel, WI | 3,128 | 29 | 42.0% |
| Lancaster, WI | 3,725 | 29 | 42.0% |
| Fennimore, WI | 2,495 | 29 | 42.0% |
| City | Population | Air Quality Index | National Avg. |
| Santa Claus, IN | 2,495 | 6 | 88.0% |
| Saint-Martin, QC | 2,495 | n/a | |
| Heber-Overgaard, AZ | 2,494 | 44 | 12.0% |
| Ingalls, IN | 2,494 | 42 | 16.0% |
| Dolgeville, NY | 2,494 | 27 | 46.0% |
| Fennimore, WI | 2,495 | 29 | 42.0% |
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