| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | -2°F | 17°F | 7°F | 0.7" |
| February | 1°F | 18°F | 9°F | 0.3" |
| March | 18°F | 36°F | 25°F | 4.0" |
| April | 33°F | 56°F | 43°F | 3.9" |
| May | 45°F | 67°F | 54°F | 2.1" |
| June | 57°F | 75°F | 65°F | 6.6" |
| July | 59°F | 81°F | 69°F | 5.1" |
| August | 55°F | 78°F | 65°F | 4.7" |
| September | 48°F | 72°F | 58°F | 1.4" |
| October | 39°F | 57°F | 46°F | 5.4" |
| November | 22°F | 37°F | 28°F | 1.4" |
| December | 6°F | 20°F | 13°F | 0.2" |
| Index | Crookston | Minnesota | National |
| Air quality index | 33 | 35 | 42 |
| Pollution index | 1,215,340 | 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 | 0.000% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.090% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Climax, MN | 218 | 33 | 34.0% |
| Fisher, MN | 517 | 33 | 34.0% |
| Crookston, MN | 7,711 | 33 | 34.0% |
| City | Population | Air Quality Index | National Avg. |
| Citrus Hills, FL | 7,711 | 30 | 40.0% |
| Rockton, IL | 7,710 | 42 | 16.0% |
| Franklin, CA | 7,709 | 48 | 4.0% |
| Wickenburg, AZ | 7,708 | 43 | 14.0% |
| Woodlake, CA | 7,708 | 66 | 32.0% |
| Crookston, MN | 7,711 | 33 | 34.0% |
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