| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | -2°F | 18°F | 7°F | 0.9" |
| February | 1°F | 19°F | 9°F | 0.1" |
| March | 18°F | 37°F | 26°F | 3.0" |
| April | 32°F | 57°F | 43°F | 3.1" |
| May | 45°F | 65°F | 53°F | 5.6" |
| June | 58°F | 76°F | 66°F | 8.5" |
| July | 61°F | 83°F | 71°F | 8.4" |
| August | 56°F | 78°F | 65°F | 2.9" |
| September | 49°F | 73°F | 59°F | 2.1" |
| October | 38°F | 57°F | 46°F | 1.5" |
| November | 23°F | 38°F | 29°F | 2.1" |
| December | 6°F | 22°F | 14°F | 1.2" |
| Index | Sykeston | North Dakota | National |
| Air quality index | 36 | 35 | 42 |
| Pollution index | 220,768 | 1,038,665 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 320 |
| Days with moderate air quality | 45 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.003% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Cathay, ND | 10 | 36 | 28.0% |
| Fessenden, ND | 560 | 36 | 28.0% |
| Bowdon, ND | 163 | 36 | 28.0% |
| New Rockford, ND | 1,428 | 36 | 28.0% |
| Carrington, ND | 1,977 | 36 | 28.0% |
| Sykeston, ND | 107 | 36 | 28.0% |
| City | Population | Air Quality Index | National Avg. |
| Newhalen, AK | 107 | 31 | 38.0% |
| Casa, AR | 107 | 38 | 24.0% |
| Fifty-Six, AR | 107 | 36 | 28.0% |
| Timber Cove, CA | 107 | 34 | 32.0% |
| Bark Ranch, CO | 107 | 47 | 6.0% |
| Sykeston, ND | 107 | 36 | 28.0% |
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