| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 12°F | 27°F | 19°F | 1.8" |
| February | 16°F | 32°F | 23°F | 1.5" |
| March | 29°F | 47°F | 37°F | 2.9" |
| April | 39°F | 61°F | 49°F | 5.8" |
| May | 50°F | 72°F | 60°F | 5.9" |
| June | 60°F | 81°F | 70°F | 6.4" |
| July | 63°F | 83°F | 72°F | 7.0" |
| August | 61°F | 81°F | 70°F | 6.1" |
| September | 54°F | 75°F | 63°F | 3.9" |
| October | 42°F | 63°F | 51°F | 5.2" |
| November | 31°F | 48°F | 39°F | 4.8" |
| December | 19°F | 32°F | 25°F | 3.5" |
| Index | Potosi | Wisconsin | National |
| Air quality index | 29 | 69 | 42 |
| Pollution index | 2,365,950 | 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 | 0.170% |
| Benzene | 0.030% |
| Carbon Tetrachloride | 0.004% |
| Lead | 0.040% |
| Mercury | 0.010% |
| City | Population | Air Quality Index | National Avg. |
| Balltown, IA | 45 | 29 | 42.0% |
| Graf, IA | 44 | 29 | 42.0% |
| East Dubuque, IL | 1,569 | 29 | 42.0% |
| North Buena Vista, IA | 115 | 29 | 42.0% |
| Tennyson, WI | 280 | 29 | 42.0% |
| Potosi, WI | 664 | 29 | 42.0% |
| City | Population | Air Quality Index | National Avg. |
| Ireton, IA | 664 | 35 | 30.0% |
| Woodland Hills, KY | 664 | 49 | 2.0% |
| Metamora, MI | 664 | 38 | 24.0% |
| North Rose, NY | 664 | 37 | 26.0% |
| Kirtland Hills, OH | 664 | 50 | = 100 |
| Potosi, WI | 664 | 29 | 42.0% |
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