| 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. |
| Lynd, MN | 432 | 32 | 36.0% |
| Russell, MN | 318 | 32 | 36.0% |
| Arco, MN | 73 | 32 | 36.0% |
| Ruthton, MN | 243 | 32 | 36.0% |
| Ivanhoe, MN | 640 | 32 | 36.0% |
| Tyler, MN | 1,329 | 32 | 36.0% |
| City | Population | Air Quality Index | National Avg. |
| Newark, AR | 1,329 | 45 | 10.0% |
| Glenns Ferry, ID | 1,329 | 20 | 60.0% |
| Vienna Bend, LA | 1,329 | 30 | 40.0% |
| Heppner, OR | 1,329 | 38 | 24.0% |
| Bally, PA | 1,329 | 42 | 16.0% |
| Tyler, MN | 1,329 | 32 | 36.0% |