Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
January | 0°F | 17°F | 8°F | 1.0" |
February | 1°F | 19°F | 9°F | 1.1" |
March | 18°F | 35°F | 26°F | 2.6" |
April | 32°F | 52°F | 41°F | 2.4" |
May | 44°F | 66°F | 54°F | 3.9" |
June | 54°F | 75°F | 64°F | 4.8" |
July | 58°F | 80°F | 69°F | 4.8" |
August | 55°F | 78°F | 66°F | 4.9" |
September | 48°F | 70°F | 58°F | 5.7" |
October | 36°F | 55°F | 44°F | 3.8" |
November | 22°F | 38°F | 29°F | 1.5" |
December | 4°F | 20°F | 12°F | 0.8" |
Index | Thief River Falls | Minnesota | National |
Air quality index | 33 | 35 | 42 |
Pollution index | 466,579 | 1,854,519 | 2,726,193 |
Measurement | Total |
Days measured | 363 |
Days with good air quality | 327 |
Days with moderate air quality | 34 |
Days w/ poor A.Q. for sensitive groups | 1 |
Days with unhealthy air quality | 1 |
Pollutant | Total |
Arsenic | 0.001% |
Benzene | 0.010% |
Carbon Tetrachloride | 0.000% |
Lead | 0.010% |
Mercury | 0.000% |
City | Population | Air Quality Index | National Avg. |
Holt, MN | 82 | 33 | 34.0% |
Plummer, MN | 282 | 33 | 34.0% |
St. Hilaire, MN | 254 | 33 | 34.0% |
Viking, MN | 133 | 33 | 34.0% |
Thief River Falls, MN | 8,792 | 33 | 34.0% |
City | Population | Air Quality Index | National Avg. |
Clinton, MO | 8,792 | 47 | 6.0% |
Glenshaw, PA | 8,791 | 56 | 12.0% |
Live Oak, CA | 8,794 | 35 | 30.0% |
Garrison, MD | 8,794 | 46 | 8.0% |
Nanaimo F, BC | 8,789 | n/a | |
Thief River Falls, MN | 8,792 | 33 | 34.0% |