| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 12°F | 26°F | 19°F | 2.8" |
| February | 12°F | 28°F | 19°F | 1.6" |
| March | 22°F | 43°F | 32°F | 3.3" |
| April | 35°F | 59°F | 47°F | 3.1" |
| May | 47°F | 70°F | 58°F | 4.8" |
| June | 58°F | 82°F | 70°F | 6.4" |
| July | 60°F | 84°F | 72°F | 5.2" |
| August | 60°F | 80°F | 69°F | 7.0" |
| September | 53°F | 75°F | 63°F | 4.6" |
| October | 43°F | 63°F | 52°F | 4.2" |
| November | 26°F | 43°F | 35°F | 3.2" |
| December | 11°F | 26°F | 19°F | 2.0" |
| Index | Vesper | Wisconsin | National |
| Air quality index | 34 | 69 | 42 |
| Pollution index | 5,835,720 | 2,842,418 | 2,726,193 |
| Measurement | Total |
| Days measured | 205 |
| Days with good air quality | 196 |
| Days with moderate air quality | 9 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.010% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 1.890% |
| Lead | 0.010% |
| Mercury | 0.490% |
| City | Population | Air Quality Index | National Avg. |
| Hewitt, WI | 1,016 | 34 | 32.0% |
| Junction City, WI | 419 | 34 | 32.0% |
| Port Edwards, WI | 1,825 | 34 | 32.0% |
| Arpin, WI | 319 | 34 | 32.0% |
| Marshfield, WI | 18,214 | 34 | 32.0% |
| Vesper, WI | 520 | 34 | 32.0% |
| City | Population | Air Quality Index | National Avg. |
| Keams Canyon, AZ | 520 | 17 | 66.0% |
| Jay, FL | 520 | 41 | 18.0% |
| Seabrook, MA | 520 | 36 | 28.0% |
| Cement City, MI | 520 | 39 | 22.0% |
| Green City, MO | 520 | 41 | 18.0% |
| Vesper, WI | 520 | 34 | 32.0% |
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