| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 2°F | 26°F | 14°F | 0.6" |
| February | 5°F | 30°F | 17°F | 0.7" |
| March | 19°F | 45°F | 31°F | 0.9" |
| April | 31°F | 61°F | 45°F | 2.3" |
| May | 43°F | 72°F | 57°F | 3.5" |
| June | 53°F | 82°F | 68°F | 3.6" |
| July | 58°F | 88°F | 73°F | 3.7" |
| August | 55°F | 84°F | 69°F | 2.5" |
| September | 46°F | 78°F | 61°F | 2.1" |
| October | 34°F | 63°F | 47°F | 2.0" |
| November | 19°F | 47°F | 32°F | 0.6" |
| December | 6°F | 28°F | 17°F | 1.0" |
| Index | Leola | South Dakota | National |
| Air quality index | 20 | 36 | 42 |
| Pollution index | 108,405 | 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 | 0.001% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Long Lake, SD | 31 | 20 | 60.0% |
| Wetonka, SD | 5 | 20 | 60.0% |
| Leola, SD | 435 | 20 | 60.0% |
| City | Population | Air Quality Index | National Avg. |
| Havana, AR | 435 | 36 | 28.0% |
| Horseshoe Lake, AR | 435 | 45 | 10.0% |
| Manzanola, CO | 435 | 20 | 60.0% |
| Spring Grove, IN | 435 | 6 | 88.0% |
| Tolchester, MD | 435 | 46 | 8.0% |
| Leola, SD | 435 | 20 | 60.0% |
Here are the best places to live in South Dakota
Check out the 10 safest cities in South Dakota
These are the largest cities in South Dakota
Most Dangerous States In The US