| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 5°F | 23°F | 14°F | 1.0" |
| February | 9°F | 29°F | 19°F | 0.6" |
| March | 19°F | 42°F | 29°F | 1.9" |
| April | 28°F | 53°F | 39°F | 2.5" |
| May | 41°F | 69°F | 55°F | 5.2" |
| June | 51°F | 79°F | 64°F | 4.8" |
| July | 54°F | 82°F | 67°F | 4.7" |
| August | 53°F | 82°F | 67°F | 5.0" |
| September | 45°F | 74°F | 58°F | 5.7" |
| October | 33°F | 57°F | 43°F | 4.1" |
| November | 19°F | 39°F | 28°F | 0.8" |
| December | 5°F | 23°F | 14°F | 0.6" |
| Index | Parshall | North Dakota | National |
| Air quality index | 34 | 35 | 42 |
| Pollution index | 368,471 | 1,038,665 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 309 |
| Days with moderate air quality | 53 |
| Days w/ poor A.Q. for sensitive groups | 3 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Plaza, ND | 195 | 34 | 32.0% |
| Parshall, ND | 1,364 | 34 | 32.0% |
| City | Population | Air Quality Index | National Avg. |
| Wisner, NE | 1,364 | 35 | 30.0% |
| Antrim, NH | 1,364 | 34 | 32.0% |
| New London, NH | 1,364 | 34 | 32.0% |
| Francis, UT | 1,364 | 46 | 8.0% |
| Pointe-à-la-Croix, QC | 1,364 | n/a | |
| Parshall, ND | 1,364 | 34 | 32.0% |
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