| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 12°F | 26°F | 18°F | 1.2" |
| February | 14°F | 29°F | 21°F | 2.6" |
| March | 28°F | 44°F | 35°F | 3.4" |
| April | 40°F | 59°F | 48°F | 4.7" |
| May | 51°F | 72°F | 60°F | 7.4" |
| June | 61°F | 80°F | 70°F | 7.3" |
| July | 66°F | 85°F | 75°F | 8.1" |
| August | 63°F | 81°F | 72°F | 9.2" |
| September | 56°F | 75°F | 64°F | 6.3" |
| October | 43°F | 60°F | 50°F | 7.3" |
| November | 30°F | 45°F | 37°F | 2.2" |
| December | 17°F | 29°F | 22°F | 3.4" |
| Index | Afton | Minnesota | National |
| Air quality index | ',number_format( $r2->med_aqi ),' | ',number_format( $r1->med_aqi ),' | ',number_format( $r0->med_aqi ),' |
| Pollution index | ',number_format( $r2->sum188 ),' | ',number_format( $r1->sum188 ),' | ',number_format( $r0->sum188 ),' |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 233 |
| Days with moderate air quality | 130 |
| Days w/ poor A.Q. for sensitive groups | 2 |
| Days with unhealthy air quality |
| Pollutant | Total |
| Arsenic | 0.040% |
| Benzene | 0.060% |
| Carbon Tetrachloride | 0.020% |
| Lead | 0.070% |
| Mercury | 0.050% |
| City, State | Population | Air Quality Index | National Avg. |
| Hastings, MN | 22,501 | 36 | 28% |
| Prescott, WI | 4,217 | 36 | 28% |
| St. Marys Point, MN | 351 | 36 | 28% |
| River Falls, WI | 15,152 | 36 | 28% |
| Roberts, WI | 1,641 | 36 | 28% |
| Afton, MN | 2,951 | 44 | 12% |
| City, State | Population | Air Quality Index | National Avg. |
| Murfreesboro, NC | 2,951 | 34 | 32% |
| Kingwood, WV | 2,951 | 30 | 40% |
| Carrollton, OH | 2,952 | 39 | 22% |
| Washoe Valley, NV | 2,950 | 44 | 12% |
| Spring Arbor, MI | 2,952 | 38 | 24% |
| Afton, MN | 2,951 | 44 | 12% |
Here are the best places to live in Minnesota
These are the 10 most affordable cities in Minnesota
Check out the 10 safest cities in Minnesota
10 Best cities in Minnesota for employment