| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 11°F | 25°F | 17°F | 1.3" |
| February | 11°F | 26°F | 18°F | 0.6" |
| March | 22°F | 41°F | 31°F | 1.4" |
| April | 35°F | 58°F | 46°F | 3.7" |
| May | 46°F | 68°F | 56°F | 5.4" |
| June | 57°F | 80°F | 68°F | 5.1" |
| July | 59°F | 82°F | 70°F | 4.8" |
| August | 59°F | 78°F | 68°F | 9.5" |
| September | 53°F | 74°F | 62°F | 6.6" |
| October | 42°F | 61°F | 51°F | 4.4" |
| November | 26°F | 41°F | 33°F | 2.0" |
| December | 11°F | 25°F | 18°F | 0.8" |
| Index | Neillsville | Wisconsin | National |
| Air quality index | 34 | 69 | 42 |
| Pollution index | 1,453,040 | 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 | 0.001% |
| Benzene | 0.030% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Merrillan, WI | 644 | 34 | 32.0% |
| Spencer, WI | 1,690 | 34 | 32.0% |
| Greenwood, WI | 955 | 34 | 32.0% |
| Chili, WI | 279 | 34 | 32.0% |
| Hatfield, WI | 207 | 34 | 32.0% |
| Neillsville, WI | 2,285 | 34 | 32.0% |
| City | Population | Air Quality Index | National Avg. |
| Paia, HI | 2,285 | 15 | 70.0% |
| Saint-Fulgence, QC | 2,285 | n/a | |
| Las Animas, CO | 2,286 | 20 | 60.0% |
| Erath, LA | 2,286 | 41 | 18.0% |
| Nedrow, NY | 2,286 | 37 | 26.0% |
| Neillsville, WI | 2,285 | 34 | 32.0% |
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