| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 7°F | 23°F | 15°F | 2.5" |
| February | 9°F | 25°F | 17°F | 1.9" |
| March | 19°F | 39°F | 28°F | 1.9" |
| April | 30°F | 54°F | 41°F | 3.0" |
| May | 42°F | 65°F | 52°F | 3.6" |
| June | 52°F | 77°F | 63°F | 6.3" |
| July | 56°F | 81°F | 68°F | 4.6" |
| August | 55°F | 78°F | 66°F | 3.6" |
| September | 50°F | 72°F | 60°F | 4.7" |
| October | 40°F | 58°F | 48°F | 9.4" |
| November | 26°F | 40°F | 32°F | 1.7" |
| December | 12°F | 25°F | 19°F | 2.1" |
| Index | Cornucopia | Wisconsin | National |
| Air quality index | 35 | 69 | 42 |
| Pollution index | 1,621,010 | 2,842,418 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 326 |
| Days with moderate air quality | 38 |
| 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. |
| Washburn, WI | 1,844 | 35 | 30.0% |
| Bayfield, WI | 466 | 35 | 30.0% |
| Port Wing, WI | 167 | 35 | 30.0% |
| Herbster, WI | 83 | 35 | 30.0% |
| Cornucopia, WI | 88 | 35 | 30.0% |
| City | Population | Air Quality Index | National Avg. |
| Beaver, AK | 88 | 38 | 24.0% |
| Nondalton, AK | 88 | 31 | 38.0% |
| Casmalia, CA | 88 | 46 | 8.0% |
| Furnace Creek, CA | 88 | 15 | 70.0% |
| Long Barn, CA | 88 | 39 | 22.0% |
| Cornucopia, WI | 88 | 35 | 30.0% |
Here are the best places to live in Wisconsin
See the best places to live in Cornucopia
Check out the 10 most dangerous cities in Wisconsin
Most Dangerous Cities In The US