| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 4°F | 21°F | 12°F | 1.2" |
| February | 5°F | 25°F | 14°F | 0.4" |
| March | 16°F | 38°F | 26°F | 1.3" |
| April | 29°F | 54°F | 40°F | 2.4" |
| May | 42°F | 67°F | 54°F | 5.7" |
| June | 52°F | 76°F | 63°F | 4.5" |
| July | 56°F | 80°F | 67°F | 3.8" |
| August | 53°F | 80°F | 66°F | 4.0" |
| September | 46°F | 72°F | 57°F | 4.5" |
| October | 34°F | 56°F | 43°F | 3.4" |
| November | 19°F | 38°F | 27°F | 1.0" |
| December | 6°F | 25°F | 15°F | 0.6" |
| Index | Plaza | 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. |
| Makoti, ND | 138 | 34 | 32.0% |
| Parshall, ND | 1,413 | 34 | 32.0% |
| Ryder, ND | 111 | 36 | 28.0% |
| Plaza, ND | 199 | 34 | 32.0% |
| City | Population | Air Quality Index | National Avg. |
| Vredenburgh, AL | 199 | 52 | 4.0% |
| Big Bend, CA | 199 | 42 | 16.0% |
| Keswick, CA | 199 | 42 | 16.0% |
| Hanlontown, IA | 199 | 15 | 70.0% |
| Merom, IN | 199 | 36 | 28.0% |
| Plaza, ND | 199 | 34 | 32.0% |