| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 6°F | 24°F | 15°F | 1.6" |
| February | 7°F | 28°F | 17°F | 1.1" |
| March | 22°F | 42°F | 31°F | 3.5" |
| April | 33°F | 56°F | 44°F | 5.1" |
| May | 43°F | 69°F | 56°F | 5.7" |
| June | 53°F | 77°F | 65°F | 5.6" |
| July | 59°F | 82°F | 70°F | 6.1" |
| August | 56°F | 79°F | 67°F | 8.6" |
| September | 49°F | 72°F | 59°F | 5.6" |
| October | 38°F | 57°F | 47°F | 6.1" |
| November | 26°F | 43°F | 34°F | 3.3" |
| December | 12°F | 27°F | 20°F | 2.5" |
| Index | Spooner | Wisconsin | National |
| Air quality index | 35 | 69 | 42 |
| Pollution index | 1,459,610 | 2,842,418 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 326 |
| Days with moderate air quality | 38 |
| Days w/ poor A.Q. for sensitive groups | 1 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.001% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.000% |
| Mercury | 0.001% |
| City | Population | Air Quality Index | National Avg. |
| Barronett, WI | 138 | 34 | 32.0% |
| Shell Lake, WI | 1,405 | 34 | 32.0% |
| Springbrook, WI | 40 | 35 | 30.0% |
| Trego, WI | 112 | 35 | 30.0% |
| Spooner, WI | 2,573 | 35 | 30.0% |
| City | Population | Air Quality Index | National Avg. |
| Cave City, KY | 2,573 | 43 | 14.0% |
| Belvidere, NJ | 2,573 | 34 | 32.0% |
| Muncy, PA | 2,573 | 35 | 30.0% |
| Shallowater, TX | 2,573 | 25 | 50.0% |
| Abbeville, AL | 2,572 | 35 | 30.0% |
| Spooner, WI | 2,573 | 35 | 30.0% |
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