| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 10°F | 26°F | 16°F | 0.4" |
| February | 12°F | 30°F | 19°F | 2.3" |
| March | 25°F | 46°F | 33°F | 2.5" |
| April | 37°F | 60°F | 47°F | 3.7" |
| May | 50°F | 72°F | 59°F | 2.9" |
| June | 61°F | 83°F | 70°F | 3.7" |
| July | 63°F | 85°F | 73°F | 5.3" |
| August | 59°F | 81°F | 69°F | 12.4" |
| September | 55°F | 80°F | 65°F | 10.3" |
| October | 42°F | 63°F | 51°F | 6.5" |
| November | 26°F | 46°F | 34°F | 7.6" |
| December | 11°F | 26°F | 18°F | 1.0" |
| Index | Tyler | Minnesota | National |
| Air quality index | 32 | 35 | 42 |
| Pollution index | 1,069,770 | 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 | 0.003% |
| Benzene | 0.040% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.020% |
| Mercury | 0.003% |
| City | Population | Air Quality Index | National Avg. |
| Ruthton, MN | 236 | 32 | 36.0% |
| Arco, MN | 71 | 32 | 36.0% |
| Florence, MN | 24 | 32 | 36.0% |
| Ivanhoe, MN | 617 | 32 | 36.0% |
| Holland, MN | 180 | 32 | 36.0% |
| Tyler, MN | 1,289 | 32 | 36.0% |
| City | Population | Air Quality Index | National Avg. |
| Lake Catherine, IL | 1,289 | 39 | 22.0% |
| Russiaville, IN | 1,289 | 42 | 16.0% |
| Bowling Green, MD | 1,289 | 36 | 28.0% |
| Buckeystown, MD | 1,289 | 40 | 20.0% |
| Barker Heights, NC | 1,289 | 44 | 12.0% |
| Tyler, MN | 1,289 | 32 | 36.0% |
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