| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 12°F | 27°F | 19°F | 2.7" |
| February | 12°F | 29°F | 20°F | 0.9" |
| March | 22°F | 40°F | 31°F | 2.4" |
| April | 33°F | 52°F | 42°F | 3.5" |
| May | 44°F | 65°F | 54°F | 5.4" |
| June | 54°F | 74°F | 64°F | 5.5" |
| July | 59°F | 80°F | 69°F | 5.5" |
| August | 58°F | 77°F | 67°F | 5.6" |
| September | 51°F | 70°F | 60°F | 5.4" |
| October | 40°F | 57°F | 49°F | 5.0" |
| November | 30°F | 45°F | 37°F | 5.4" |
| December | 17°F | 31°F | 24°F | 2.4" |
| Index | Lena | Wisconsin | National |
| Air quality index | 36 | 69 | 42 |
| Pollution index | 1,948,250 | 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 | 0.001% |
| Benzene | 0.030% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.000% |
| Mercury | 0.001% |
| City | Population | Air Quality Index | National Avg. |
| Krakow, WI | 302 | 36 | 28.0% |
| Coleman, WI | 698 | 36 | 28.0% |
| Gillett, WI | 1,258 | 36 | 28.0% |
| Pound, WI | 390 | 36 | 28.0% |
| Oconto, WI | 4,516 | 36 | 28.0% |
| Lena, WI | 607 | 36 | 28.0% |
| City | Population | Air Quality Index | National Avg. |
| Fort Garland, CO | 607 | 16 | 68.0% |
| Nucla, CO | 607 | 44 | 12.0% |
| Cove City, NC | 607 | 42 | 16.0% |
| Red Oak, OK | 607 | 43 | 14.0% |
| Bucksport, SC | 607 | 14 | 72.0% |
| Lena, WI | 607 | 36 | 28.0% |
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