| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 3°F | 22°F | 12°F | 0.2" |
| February | 5°F | 24°F | 13°F | 0.3" |
| March | 19°F | 39°F | 27°F | 0.7" |
| April | 31°F | 56°F | 42°F | 1.3" |
| May | 43°F | 68°F | 55°F | 3.8" |
| June | 55°F | 78°F | 65°F | 3.9" |
| July | 59°F | 84°F | 71°F | 2.6" |
| August | 56°F | 81°F | 67°F | 2.7" |
| September | 48°F | 73°F | 59°F | 2.5" |
| October | 36°F | 57°F | 45°F | 1.8" |
| November | 21°F | 41°F | 30°F | 0.5" |
| December | 6°F | 23°F | 15°F | 0.4" |
| Index | Hannaford | North Dakota | National |
| Air quality index | 33 | 35 | 42 |
| Pollution index | 157,486 | 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 | 0.002% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Cooperstown, ND | 1,042 | 33 | 34.0% |
| Wimbledon, ND | 180 | 33 | 34.0% |
| Dazey, ND | 51 | 33 | 34.0% |
| Luverne, ND | 24 | 33 | 34.0% |
| Leal, ND | 11 | 33 | 34.0% |
| Hannaford, ND | 101 | 33 | 34.0% |
| City | Population | Air Quality Index | National Avg. |
| Whale Pass, AK | 101 | 20 | 60.0% |
| Deer Park, AL | 101 | 42 | 16.0% |
| Maysville, CO | 101 | 16 | 68.0% |
| Hilltop, GA | 101 | 52 | 4.0% |
| Pleasant Plain, IA | 101 | 35 | 30.0% |
| Hannaford, ND | 101 | 33 | 34.0% |
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