| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 8°F | 26°F | 17°F | 0.6" |
| February | 11°F | 30°F | 19°F | 1.1" |
| March | 25°F | 44°F | 33°F | 3.2" |
| April | 35°F | 58°F | 46°F | 3.1" |
| May | 48°F | 71°F | 59°F | 5.0" |
| June | 58°F | 80°F | 69°F | 6.7" |
| July | 62°F | 86°F | 74°F | 5.7" |
| August | 60°F | 82°F | 70°F | 7.1" |
| September | 52°F | 77°F | 63°F | 6.5" |
| October | 40°F | 61°F | 50°F | 5.0" |
| November | 27°F | 47°F | 36°F | 3.1" |
| December | 13°F | 29°F | 21°F | 1.8" |
| Index | Appleton | Minnesota | National |
| Air quality index | 32 | 35 | 42 |
| Pollution index | 616,877 | 1,854,519 | 2,726,193 |
| Measurement | Total |
| Days measured | 362 |
| Days with good air quality | 327 |
| Days with moderate air quality | 35 |
| 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 | 0.002% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Louisburg, MN | 27 | 25 | 50.0% |
| Odessa, MN | 91 | 25 | 50.0% |
| Bellingham, MN | 266 | 25 | 50.0% |
| Correll, MN | 47 | 25 | 50.0% |
| Milan, MN | 364 | 32 | 36.0% |
| Appleton, MN | 1,339 | 32 | 36.0% |
| City | Population | Air Quality Index | National Avg. |
| Buttonwillow, CA | 1,339 | 67 | 34.0% |
| Solana, FL | 1,339 | 36 | 28.0% |
| Britton, SD | 1,339 | 20 | 60.0% |
| Reynolds, MB | 1,339 | n/a | |
| Funny River, AK | 1,340 | 31 | 38.0% |
| Appleton, MN | 1,339 | 32 | 36.0% |
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