| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 7°F | 22°F | 15°F | 1.0" |
| February | 7°F | 25°F | 15°F | 1.3" |
| March | 18°F | 39°F | 28°F | 1.9" |
| April | 32°F | 56°F | 43°F | 3.2" |
| May | 44°F | 67°F | 54°F | 3.2" |
| June | 55°F | 79°F | 67°F | 6.2" |
| July | 57°F | 81°F | 69°F | 6.4" |
| August | 56°F | 78°F | 66°F | 4.2" |
| September | 50°F | 72°F | 61°F | 5.1" |
| October | 41°F | 59°F | 49°F | 5.8" |
| November | 24°F | 39°F | 31°F | 2.1" |
| December | 9°F | 24°F | 17°F | 0.9" |
| Index | Elcho | Wisconsin | National |
| Air quality index | 34 | 69 | 42 |
| Pollution index | 1,866,120 | 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 | 0.004% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.010% |
| Mercury | 0.002% |
| City | Population | Air Quality Index | National Avg. |
| Crandon, WI | 1,735 | 34 | 32.0% |
| Summit Lake, WI | 73 | 34 | 32.0% |
| Mole Lake, WI | 527 | 34 | 32.0% |
| Post Lake, WI | 255 | 34 | 32.0% |
| Rhinelander, WI | 7,617 | 34 | 32.0% |
| Elcho, WI | 265 | 34 | 32.0% |
| City | Population | Air Quality Index | National Avg. |
| Letona, AR | 265 | 45 | 10.0% |
| Lonsdale, AR | 265 | 38 | 24.0% |
| Trinity Center, CA | 265 | 42 | 16.0% |
| Garden Prairie, IL | 265 | 42 | 16.0% |
| Arjay, KY | 265 | 39 | 22.0% |
| Elcho, WI | 265 | 34 | 32.0% |
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