| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 6°F | 28°F | 17°F | 0.5" |
| February | 9°F | 34°F | 20°F | 0.7" |
| March | 22°F | 48°F | 34°F | 1.0" |
| April | 33°F | 62°F | 47°F | 2.2" |
| May | 44°F | 73°F | 58°F | 3.2" |
| June | 55°F | 83°F | 69°F | 4.5" |
| July | 61°F | 89°F | 75°F | 2.7" |
| August | 58°F | 85°F | 71°F | 3.3" |
| September | 49°F | 79°F | 63°F | 2.8" |
| October | 36°F | 64°F | 49°F | 2.2" |
| November | 22°F | 49°F | 34°F | 0.8" |
| December | 9°F | 31°F | 19°F | 1.3" |
| Index | Miller | South Dakota | National |
| Air quality index | 20 | 36 | 42 |
| Pollution index | 138,400 | 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 | 0.002% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.004% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| St. Lawrence, SD | 167 | 20 | 60.0% |
| Wessington, SD | 241 | 20 | 60.0% |
| Ree Heights, SD | 60 | 20 | 60.0% |
| Miller, SD | 1,366 | 20 | 60.0% |
| City | Population | Air Quality Index | National Avg. |
| Frenchtown, NJ | 1,366 | 42 | 16.0% |
| Milton CDP (Ulster County), NY | 1,366 | 37 | 26.0% |
| Rockaway Beach, OR | 1,366 | 18 | 64.0% |
| Nokesville, VA | 1,366 | 47 | 6.0% |
| Tring-Jonction, QC | 1,366 | n/a | |
| Miller, SD | 1,366 | 20 | 60.0% |
Here are the best places to live in South Dakota
These are the 10 cheapest cities in South Dakota
Most Dangerous Cities In The US
These are the largest cities in South Dakota