| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | -1°F | 18°F | 7°F | 1.0" |
| February | 2°F | 19°F | 10°F | 0.4" |
| March | 18°F | 37°F | 26°F | 1.8" |
| April | 33°F | 58°F | 44°F | 2.3" |
| May | 47°F | 68°F | 57°F | 8.9" |
| June | 59°F | 77°F | 68°F | 7.4" |
| July | 61°F | 82°F | 72°F | 3.8" |
| August | 57°F | 79°F | 68°F | 6.4" |
| September | 48°F | 73°F | 60°F | 2.5" |
| October | 38°F | 57°F | 47°F | 6.6" |
| November | 23°F | 39°F | 30°F | 2.3" |
| December | 6°F | 21°F | 14°F | 1.2" |
| Index | Hope | North Dakota | National |
| Air quality index | 33 | 35 | 42 |
| Pollution index | 151,183 | 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. |
| Finley, ND | 410 | 33 | 34.0% |
| Clifford, ND | 37 | 33 | 34.0% |
| Luverne, ND | 24 | 33 | 34.0% |
| Galesburg, ND | 104 | 33 | 34.0% |
| Pillsbury, ND | 10 | 33 | 34.0% |
| Hope, ND | 273 | 33 | 34.0% |
| City | Population | Air Quality Index | National Avg. |
| Chidester, AR | 273 | 32 | 36.0% |
| Russell, AR | 273 | 45 | 10.0% |
| Valley Springs, AR | 273 | 36 | 28.0% |
| Westcreek, CO | 273 | 45 | 10.0% |
| Culloden, GA | 273 | 38 | 24.0% |
| Hope, ND | 273 | 33 | 34.0% |
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