| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 12°F | 28°F | 20°F | 1.2" |
| February | 12°F | 31°F | 21°F | 2.9" |
| March | 25°F | 45°F | 34°F | 4.4" |
| April | 36°F | 58°F | 46°F | 4.5" |
| May | 46°F | 72°F | 58°F | 5.1" |
| June | 56°F | 80°F | 67°F | 4.3" |
| July | 59°F | 85°F | 72°F | 5.5" |
| August | 59°F | 82°F | 70°F | 6.7" |
| September | 50°F | 75°F | 61°F | 4.8" |
| October | 40°F | 61°F | 49°F | 4.1" |
| November | 29°F | 47°F | 37°F | 3.2" |
| December | 17°F | 32°F | 24°F | 2.6" |
| Index | Northport | Wisconsin | National |
| Air quality index | 37 | 69 | 42 |
| Pollution index | 4,238,840 | 2,842,418 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 304 |
| Days with moderate air quality | 59 |
| Days w/ poor A.Q. for sensitive groups | 2 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.050% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.010% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Big Falls, WI | 134 | 34 | 32.0% |
| Winchester, WI | 572 | 37 | 26.0% |
| Manawa, WI | 1,224 | 37 | 26.0% |
| Clintonville, WI | 4,351 | 37 | 26.0% |
| Waupaca, WI | 5,916 | 37 | 26.0% |
| Northport, WI | 459 | 37 | 26.0% |
| City | Population | Air Quality Index | National Avg. |
| Kwethluk, AK | 459 | 31 | 38.0% |
| Silas, AL | 459 | 36 | 28.0% |
| Lexington, GA | 459 | 44 | 12.0% |
| Elkhart, IL | 459 | 40 | 20.0% |
| Coatesville, IN | 459 | 54 | 8.0% |
| Northport, WI | 459 | 37 | 26.0% |
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