| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 6°F | 25°F | 15°F | 1.9" |
| February | 11°F | 30°F | 20°F | 0.6" |
| March | 22°F | 44°F | 32°F | 3.2" |
| April | 34°F | 57°F | 44°F | 5.0" |
| May | 45°F | 72°F | 58°F | 3.2" |
| June | 56°F | 81°F | 68°F | 5.3" |
| July | 59°F | 85°F | 71°F | 7.2" |
| August | 57°F | 82°F | 69°F | 6.8" |
| September | 47°F | 74°F | 59°F | 3.5" |
| October | 37°F | 61°F | 48°F | 4.7" |
| November | 27°F | 47°F | 36°F | 2.5" |
| December | 12°F | 30°F | 20°F | 1.3" |
| Index | Plainfield | Wisconsin | National |
| Air quality index | 34 | 69 | 42 |
| Pollution index | 2,747,410 | 2,842,418 | 2,726,193 |
| Measurement | Total |
| Days measured | 205 |
| Days with good air quality | 196 |
| Days with moderate air quality | 9 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.005% |
| Benzene | 0.060% |
| Carbon Tetrachloride | 0.003% |
| Lead | 0.003% |
| Mercury | 0.004% |
| City | Population | Air Quality Index | National Avg. |
| Almond, WI | 462 | 34 | 32.0% |
| Bancroft, WI | 540 | 34 | 32.0% |
| Biron, WI | 953 | 34 | 32.0% |
| Lake Wazeecha, WI | 2,671 | 34 | 32.0% |
| Wautoma, WI | 2,028 | 35 | 30.0% |
| Plainfield, WI | 981 | 34 | 32.0% |
| City | Population | Air Quality Index | National Avg. |
| Hollywood, AL | 981 | 39 | 22.0% |
| Knights Landing, CA | 981 | 52 | 4.0% |
| Sonora, KY | 981 | 39 | 22.0% |
| Duck Hill, MS | 981 | 33 | 34.0% |
| Smithfield, PA | 981 | 36 | 28.0% |
| Plainfield, WI | 981 | 34 | 32.0% |
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