| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 14°F | 31°F | 22°F | 2.9" |
| February | 14°F | 32°F | 23°F | 3.1" |
| March | 27°F | 48°F | 37°F | 4.0" |
| April | 37°F | 63°F | 49°F | 4.2" |
| May | 47°F | 74°F | 60°F | 2.7" |
| June | 59°F | 84°F | 71°F | 6.3" |
| July | 61°F | 86°F | 73°F | 7.4" |
| August | 61°F | 82°F | 71°F | 12.1" |
| September | 54°F | 79°F | 65°F | 3.9" |
| October | 43°F | 66°F | 54°F | 4.1" |
| November | 28°F | 48°F | 38°F | 3.9" |
| December | 14°F | 30°F | 22°F | 2.8" |
| Index | Mount Sterling | Wisconsin | National |
| Air quality index | 35 | 69 | 42 |
| Pollution index | 416,116 | 2,842,418 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 310 |
| Days with moderate air quality | 55 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.001% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Steuben, WI | 118 | 29 | 42.0% |
| Boscobel, WI | 3,247 | 29 | 42.0% |
| Eastman, WI | 413 | 29 | 42.0% |
| Lansing, IA | 918 | 35 | 30.0% |
| Bell Center, WI | 99 | 35 | 30.0% |
| Mount Sterling, WI | 134 | 35 | 30.0% |
| City | Population | Air Quality Index | National Avg. |
| St. Paul, AR | 134 | 44 | 12.0% |
| East Pleasant View, CO | 134 | 58 | 16.0% |
| Garfield, GA | 134 | 47 | 6.0% |
| Parrott, GA | 134 | 39 | 22.0% |
| Marne, IA | 134 | 40 | 20.0% |
| Mount Sterling, WI | 134 | 35 | 30.0% |