| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 14°F | 31°F | 22°F | 2.9" |
| February | 18°F | 35°F | 26°F | 1.6" |
| March | 30°F | 49°F | 38°F | 2.6" |
| April | 38°F | 61°F | 48°F | 5.8" |
| May | 50°F | 74°F | 61°F | 5.4" |
| June | 59°F | 83°F | 71°F | 6.3" |
| July | 66°F | 90°F | 78°F | 3.9" |
| August | 61°F | 85°F | 72°F | 5.2" |
| September | 51°F | 74°F | 62°F | 2.8" |
| October | 40°F | 63°F | 51°F | 8.9" |
| November | 33°F | 51°F | 41°F | 2.9" |
| December | 20°F | 35°F | 27°F | 3.2" |
| Index | Dane | Wisconsin | National |
| Air quality index | 39 | 69 | 42 |
| Pollution index | 350,021 | 2,842,418 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 285 |
| Days with moderate air quality | 80 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.003% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.001% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Merrimac, WI | 672 | 35 | 30.0% |
| Bluffview, WI | 731 | 35 | 30.0% |
| Poynette, WI | 2,507 | 35 | 30.0% |
| Lake Wisconsin, WI | 4,573 | 35 | 30.0% |
| Prairie du Sac, WI | 4,397 | 35 | 30.0% |
| Dane, WI | 1,008 | 39 | 22.0% |
| City | Population | Air Quality Index | National Avg. |
| New Union, AL | 1,008 | 43 | 14.0% |
| West Cape May, NJ | 1,008 | 42 | 16.0% |
| Neffs, OH | 1,008 | 39 | 22.0% |
| Knox, PA | 1,008 | 33 | 34.0% |
| Reid Hope King, TX | 1,008 | 44 | 12.0% |
| Dane, WI | 1,008 | 39 | 22.0% |
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