| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 6°F | 24°F | 15°F | 1.4" |
| February | 8°F | 28°F | 18°F | 2.2" |
| March | 23°F | 43°F | 32°F | 3.7" |
| April | 34°F | 55°F | 44°F | 4.7" |
| May | 45°F | 69°F | 56°F | 8.2" |
| June | 55°F | 77°F | 65°F | 6.9" |
| July | 58°F | 80°F | 69°F | 5.3" |
| August | 57°F | 78°F | 67°F | 9.2" |
| September | 49°F | 72°F | 59°F | 4.9" |
| October | 38°F | 58°F | 47°F | 6.5" |
| November | 27°F | 44°F | 34°F | 3.2" |
| December | 14°F | 28°F | 21°F | 2.4" |
| Index | Gilman | Wisconsin | National |
| Air quality index | 34 | 69 | 42 |
| Pollution index | 2,716,640 | 2,842,418 | 2,726,193 |
| Measurement | Total |
| Days measured | 363 |
| Days with good air quality | 305 |
| Days with moderate air quality | 58 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.003% |
| Benzene | 0.040% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.010% |
| Mercury | 0.003% |
| City | Population | Air Quality Index | National Avg. |
| Boyd, WI | 603 | 34 | 32.0% |
| Stanley, WI | 3,678 | 34 | 32.0% |
| Jump River, WI | 25 | 34 | 32.0% |
| Thorp, WI | 1,651 | 34 | 32.0% |
| Lublin, WI | 108 | 34 | 32.0% |
| Gilman, WI | 444 | 34 | 32.0% |
| City | Population | Air Quality Index | National Avg. |
| Pleasant Valley, AK | 444 | 38 | 24.0% |
| Emmet, AR | 444 | 32 | 36.0% |
| Avery, CA | 444 | 39 | 22.0% |
| Collins, IA | 444 | 37 | 26.0% |
| Norwich, KS | 444 | 40 | 20.0% |
| Gilman, WI | 444 | 34 | 32.0% |
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