| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | -5°F | 17°F | 5°F | 4.5" |
| February | -4°F | 20°F | 8°F | 2.1" |
| March | 12°F | 36°F | 24°F | 1.7" |
| April | 27°F | 52°F | 39°F | 1.5" |
| May | 40°F | 65°F | 52°F | 3.3" |
| June | 50°F | 74°F | 62°F | 4.2" |
| July | 54°F | 80°F | 67°F | 3.1" |
| August | 51°F | 78°F | 64°F | 2.8" |
| September | 44°F | 70°F | 56°F | 3.0" |
| October | 33°F | 55°F | 43°F | 2.0" |
| November | 19°F | 37°F | 27°F | 2.1" |
| December | 1°F | 19°F | 10°F | 3.7" |
| Index | Warroad | Minnesota | National |
| Air quality index | 33 | 35 | 42 |
| Pollution index | 1,015,090 | 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 | 0.010% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.010% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Roosevelt, MN | 126 | 33 | 34.0% |
| Warroad, MN | 2,051 | 33 | 34.0% |
| City | Population | Air Quality Index | National Avg. |
| Noel, MO | 2,051 | 38 | 24.0% |
| Honey Brook, PA | 2,051 | 42 | 16.0% |
| Lima, PA | 2,051 | 51 | 2.0% |
| Hopewell, TN | 2,051 | 1 | 98.0% |
| Grandview, TX | 2,051 | 33 | 34.0% |
| Warroad, MN | 2,051 | 33 | 34.0% |
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