| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 8°F | 24°F | 16°F | 0.9" |
| February | 10°F | 27°F | 18°F | 0.7" |
| March | 22°F | 41°F | 31°F | 1.7" |
| April | 34°F | 56°F | 45°F | 3.3" |
| May | 46°F | 69°F | 56°F | 3.8" |
| June | 56°F | 78°F | 66°F | 4.7" |
| July | 60°F | 82°F | 71°F | 4.3" |
| August | 58°F | 79°F | 68°F | 4.5" |
| September | 50°F | 72°F | 60°F | 3.8" |
| October | 39°F | 57°F | 47°F | 3.4" |
| November | 27°F | 43°F | 35°F | 1.5" |
| December | 14°F | 28°F | 20°F | 1.9" |
| Index | Marathon City | Wisconsin | National |
| Air quality index | 34 | 69 | 42 |
| Pollution index | 4,968,600 | 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 | 0.020% |
| Benzene | 0.060% |
| Carbon Tetrachloride | 0.010% |
| Lead | 0.030% |
| Mercury | 0.040% |
| City | Population | Air Quality Index | National Avg. |
| Fenwood, WI | 160 | 34 | 32.0% |
| Knowlton, WI | 78 | 34 | 32.0% |
| Rib Mountain, WI | 5,963 | 34 | 32.0% |
| Weston, WI | 15,139 | 34 | 32.0% |
| Stratford, WI | 1,454 | 34 | 32.0% |
| Marathon City, WI | 1,331 | 34 | 32.0% |
| City | Population | Air Quality Index | National Avg. |
| Dryden, MI | 1,331 | 38 | 24.0% |
| Grass Lake, MI | 1,331 | 40 | 20.0% |
| Chocowinity, NC | 1,331 | 0 | 100.0% |
| Navesink, NJ | 1,331 | 51 | 2.0% |
| Point Marion, PA | 1,331 | 36 | 28.0% |
| Marathon City, WI | 1,331 | 34 | 32.0% |
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