| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 11°F | 30°F | 20°F | 1.5" |
| February | 13°F | 33°F | 23°F | 1.5" |
| March | 24°F | 47°F | 35°F | 2.6" |
| April | 35°F | 61°F | 48°F | 4.4" |
| May | 46°F | 73°F | 59°F | 4.0" |
| June | 57°F | 81°F | 69°F | 5.9" |
| July | 60°F | 85°F | 73°F | 4.9" |
| August | 59°F | 83°F | 71°F | 4.8" |
| September | 51°F | 77°F | 63°F | 3.5" |
| October | 40°F | 63°F | 51°F | 3.2" |
| November | 28°F | 49°F | 38°F | 2.1" |
| December | 17°F | 34°F | 25°F | 2.3" |
| Index | Poynette | Wisconsin | National |
| Air quality index | 35 | 69 | 42 |
| Pollution index | 350,021 | 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 | 0.003% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.001% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Wyocena, WI | 732 | 35 | 30.0% |
| Merrimac, WI | 672 | 35 | 30.0% |
| Pardeeville, WI | 2,046 | 35 | 30.0% |
| Lake Wisconsin, WI | 4,573 | 35 | 30.0% |
| Portage, WI | 10,412 | 35 | 30.0% |
| Poynette, WI | 2,507 | 35 | 30.0% |
| City | Population | Air Quality Index | National Avg. |
| Linden, AZ | 2,507 | 44 | 12.0% |
| Whittingham, NJ | 2,507 | 41 | 18.0% |
| Holly Lake Ranch, TX | 2,507 | 36 | 28.0% |
| Clearwater, BC | 2,507 | n/a | |
| Hernando Beach, FL | 2,506 | 30 | 40.0% |
| Poynette, WI | 2,507 | 35 | 30.0% |
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