| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 12°F | 32°F | 21°F | 0.4" |
| February | 12°F | 33°F | 21°F | 0.8" |
| March | 25°F | 49°F | 35°F | 1.4" |
| April | 35°F | 62°F | 47°F | 1.9" |
| May | 45°F | 71°F | 57°F | 3.0" |
| June | 56°F | 81°F | 68°F | 4.2" |
| July | 63°F | 92°F | 76°F | 1.8" |
| August | 61°F | 88°F | 73°F | 2.7" |
| September | 52°F | 79°F | 64°F | 2.0" |
| October | 37°F | 60°F | 47°F | 2.9" |
| November | 26°F | 49°F | 36°F | 0.5" |
| December | 11°F | 30°F | 20°F | 0.8" |
| Index | Vivian | South Dakota | National |
| Air quality index | 20 | 36 | 42 |
| Pollution index | 213,103 | 345,623 | 2,726,193 |
| Measurement | Total |
| Days measured | 122 |
| Days with good air quality | 112 |
| Days with moderate air quality | 10 |
| 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. |
| Presho, SD | 411 | 20 | 60.0% |
| Draper, SD | 66 | 44 | 12.0% |
| Vivian, SD | 87 | 20 | 60.0% |
| City | Population | Air Quality Index | National Avg. |
| Mooresville, AL | 87 | 41 | 18.0% |
| Ozan, AR | 87 | 39 | 22.0% |
| Cokedale, CO | 87 | 15 | 70.0% |
| West Chester, IA | 87 | 35 | 30.0% |
| Wiota, IA | 87 | 40 | 20.0% |
| Vivian, SD | 87 | 20 | 60.0% |
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