| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 4°F | 21°F | 12°F | 0.3" |
| February | 6°F | 24°F | 14°F | 0.3" |
| March | 21°F | 39°F | 29°F | 1.1" |
| April | 34°F | 55°F | 44°F | 2.1" |
| May | 46°F | 68°F | 56°F | 3.3" |
| June | 57°F | 77°F | 66°F | 4.0" |
| July | 62°F | 83°F | 72°F | 4.0" |
| August | 59°F | 79°F | 69°F | 4.6" |
| September | 52°F | 72°F | 61°F | 3.2" |
| October | 39°F | 57°F | 47°F | 2.9" |
| November | 25°F | 41°F | 32°F | 0.9" |
| December | 9°F | 24°F | 16°F | 0.5" |
| Index | Glenwood | Minnesota | National |
| Air quality index | 32 | 35 | 42 |
| Pollution index | 4,588,720 | 1,854,519 | 2,726,193 |
| Measurement | Total |
| Days measured | 344 |
| Days with good air quality | 313 |
| Days with moderate air quality | 31 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.010% |
| Benzene | 0.080% |
| Carbon Tetrachloride | 0.010% |
| Lead | 0.040% |
| Mercury | 0.050% |
| City | Population | Air Quality Index | National Avg. |
| Starbuck, MN | 1,351 | 32 | 36.0% |
| West Union, MN | 81 | 32 | 36.0% |
| Villard, MN | 316 | 32 | 36.0% |
| Brooten, MN | 598 | 32 | 36.0% |
| Alexandria, MN | 13,705 | 32 | 36.0% |
| Glenwood, MN | 2,563 | 32 | 36.0% |
| City | Population | Air Quality Index | National Avg. |
| Cape Neddick, ME | 2,563 | 40 | 20.0% |
| Division No. 7, Subd. E, NL | 2,562 | n/a | |
| Petersburg, IL | 2,564 | 40 | 20.0% |
| Premont, TX | 2,564 | 30 | 40.0% |
| Fobes Hill, WA | 2,564 | 45 | 10.0% |
| Glenwood, MN | 2,563 | 32 | 36.0% |
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