| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 6°F | 25°F | 15°F | 1.9" |
| February | 11°F | 30°F | 20°F | 0.6" |
| March | 22°F | 44°F | 32°F | 3.2" |
| April | 34°F | 57°F | 44°F | 5.0" |
| May | 45°F | 72°F | 58°F | 3.2" |
| June | 56°F | 81°F | 68°F | 5.3" |
| July | 59°F | 85°F | 71°F | 7.2" |
| August | 57°F | 82°F | 69°F | 6.8" |
| September | 47°F | 74°F | 59°F | 3.5" |
| October | 37°F | 61°F | 48°F | 4.7" |
| November | 27°F | 47°F | 36°F | 2.5" |
| December | 12°F | 30°F | 20°F | 1.3" |
| Index | Dalton | Wisconsin | National |
| Air quality index | 40 | 69 | 42 |
| Pollution index | 3,153,950 | 2,842,418 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 297 |
| Days with moderate air quality | 67 |
| Days w/ poor A.Q. for sensitive groups | 1 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.010% |
| Benzene | 0.050% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.002% |
| Mercury | 0.150% |
| City | Population | Air Quality Index | National Avg. |
| Wyocena, WI | 732 | 35 | 30.0% |
| Endeavor, WI | 562 | 35 | 30.0% |
| Portage, WI | 10,412 | 35 | 30.0% |
| Montello, WI | 1,439 | 35 | 30.0% |
| Packwaukee, WI | 194 | 35 | 30.0% |
| Dalton, WI | 203 | 40 | 20.0% |
| City | Population | Air Quality Index | National Avg. |
| Gakona, AK | 203 | 31 | 38.0% |
| La Vina, CA | 203 | 50 | = 100 |
| Glen Ridge, FL | 203 | 36 | 28.0% |
| Highland Park, FL | 203 | 36 | 28.0% |
| Whitfield CDP (Santa Rosa County), FL | 203 | 38 | 24.0% |
| Dalton, WI | 203 | 40 | 20.0% |
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