| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 12°F | 28°F | 20°F | 1.7" |
| February | 14°F | 32°F | 23°F | 1.6" |
| March | 25°F | 45°F | 34°F | 3.4" |
| April | 36°F | 57°F | 45°F | 4.0" |
| May | 47°F | 71°F | 58°F | 4.5" |
| June | 57°F | 79°F | 67°F | 6.4" |
| July | 60°F | 84°F | 72°F | 5.9" |
| August | 60°F | 81°F | 69°F | 6.2" |
| September | 51°F | 73°F | 61°F | 4.4" |
| October | 41°F | 60°F | 50°F | 5.4" |
| November | 31°F | 48°F | 38°F | 4.2" |
| December | 20°F | 33°F | 26°F | 2.8" |
| Index | Legend Lake | Wisconsin | National |
| Air quality index | 36 | 69 | 42 |
| Pollution index | 1,864,330 | 2,842,418 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 311 |
| Days with moderate air quality | 54 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.003% |
| Benzene | 0.030% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.070% |
| Mercury | 0.003% |
| City | Population | Air Quality Index | National Avg. |
| Middle Village, WI | 214 | 34 | 32.0% |
| Gresham, WI | 511 | 34 | 32.0% |
| Neopit, WI | 694 | 34 | 32.0% |
| Green Valley, WI | 80 | 36 | 28.0% |
| Gillett, WI | 1,258 | 36 | 28.0% |
| Legend Lake, WI | 1,396 | 36 | 28.0% |
| City | Population | Air Quality Index | National Avg. |
| Machias, ME | 1,396 | 31 | 38.0% |
| Princeton, NC | 1,396 | 40 | 20.0% |
| Banner Hill, TN | 1,396 | 45 | 10.0% |
| Rogers, TX | 1,396 | 42 | 16.0% |
| Saint-Ubalde, QC | 1,396 | n/a | |
| Legend Lake, WI | 1,396 | 36 | 28.0% |
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