| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 11°F | 27°F | 19°F | 1.8" |
| February | 13°F | 30°F | 21°F | 1.8" |
| March | 25°F | 45°F | 34°F | 4.2" |
| April | 36°F | 58°F | 46°F | 6.0" |
| May | 47°F | 70°F | 58°F | 4.7" |
| June | 57°F | 78°F | 67°F | 9.0" |
| July | 60°F | 83°F | 71°F | 5.9" |
| August | 59°F | 80°F | 69°F | 7.4" |
| September | 51°F | 73°F | 61°F | 5.8" |
| October | 41°F | 60°F | 49°F | 5.8" |
| November | 29°F | 46°F | 37°F | 4.1" |
| December | 17°F | 31°F | 24°F | 2.7" |
| Index | Baraboo | Wisconsin | National |
| Air quality index | 35 | 69 | 42 |
| Pollution index | 17,909,400 | 2,842,418 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 311 |
| Days with moderate air quality | 53 |
| Days w/ poor A.Q. for sensitive groups | 1 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.070% |
| Benzene | 0.160% |
| Carbon Tetrachloride | 0.060% |
| Lead | 0.080% |
| Mercury | 0.070% |
| City | Population | Air Quality Index | National Avg. |
| Reedsburg, WI | 9,508 | 35 | 30.0% |
| Lodi, WI | 3,073 | 35 | 30.0% |
| Prairie du Sac, WI | 4,397 | 35 | 30.0% |
| Wisconsin Dells, WI | 2,907 | 35 | 30.0% |
| Bluffview, WI | 731 | 35 | 30.0% |
| Baraboo, WI | 12,133 | 35 | 30.0% |
| City | Population | Air Quality Index | National Avg. |
| Sylacauga, AL | 12,132 | 38 | 24.0% |
| Cascades, VA | 12,132 | 47 | 6.0% |
| Fortuna, CA | 12,135 | 27 | 46.0% |
| Lake Tapps, WA | 12,129 | 45 | 10.0% |
| Somerville, NJ | 12,139 | 41 | 18.0% |
| Baraboo, WI | 12,133 | 35 | 30.0% |
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