| 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 | Mellen | Wisconsin | National |
| Air quality index | 35 | 69 | 42 |
| Pollution index | 1,807,460 | 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 | 0.010% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Clam Lake, WI | 17 | 35 | 30.0% |
| Saxon, WI | 58 | 35 | 30.0% |
| Birch Hill, WI | 206 | 35 | 30.0% |
| Glidden, WI | 231 | 35 | 30.0% |
| Marengo, WI | 137 | 35 | 30.0% |
| Mellen, WI | 573 | 35 | 30.0% |
| City | Population | Air Quality Index | National Avg. |
| Buena Vista, CA | 573 | 45 | 10.0% |
| Bell, FL | 573 | 35 | 30.0% |
| Lee, FL | 573 | 35 | 30.0% |
| Mettawa, IL | 573 | 55 | 10.0% |
| Wilson, LA | 573 | 45 | 10.0% |
| Mellen, WI | 573 | 35 | 30.0% |
Here are the best places to live in Wisconsin
Top 10 best public schools in Mellen
These are the 10 most affordable cities in Wisconsin
See the best places to live in & around Mellen