| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | -2°F | 17°F | 8°F | 0.5" |
| February | -2°F | 18°F | 8°F | 0.6" |
| March | 17°F | 34°F | 25°F | 1.3" |
| April | 33°F | 57°F | 44°F | 1.1" |
| May | 43°F | 68°F | 54°F | 3.3" |
| June | 54°F | 77°F | 65°F | 4.2" |
| July | 58°F | 83°F | 70°F | 2.0" |
| August | 55°F | 80°F | 67°F | 3.7" |
| September | 48°F | 73°F | 59°F | 2.3" |
| October | 35°F | 54°F | 43°F | 2.9" |
| November | 23°F | 40°F | 30°F | 1.1" |
| December | 3°F | 20°F | 11°F | 1.1" |
| Index | Manvel | North Dakota | National |
| Air quality index | 33 | 35 | 42 |
| Pollution index | 1,215,340 | 1,038,665 | 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. |
| Forest River, ND | 132 | 33 | 34.0% |
| Oslo, MN | 304 | 33 | 34.0% |
| Gilby, ND | 313 | 33 | 34.0% |
| Grand Forks, ND | 56,588 | 33 | 34.0% |
| Grand Forks AFB, ND | 2,785 | 33 | 34.0% |
| Manvel, ND | 325 | 33 | 34.0% |
| City | Population | Air Quality Index | National Avg. |
| Colt, AR | 325 | 45 | 10.0% |
| Oak Shores, CA | 325 | 46 | 8.0% |
| Eldorado Springs, CO | 325 | 47 | 6.0% |
| Bronson, IA | 325 | 35 | 30.0% |
| Oldtown, ID | 325 | 43 | 14.0% |
| Manvel, ND | 325 | 33 | 34.0% |
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