| Station: | Yankton, South Dakota | Continent: | North America | ||
| River: | Missouri | Major Basin : | Mississippi | ||
| Country: | United States | Discharge into : | Atlantic Ocean | ||
| Observation Period: | 1930 - 1984 | Total Months: | 651 | ||
| Latitude (dec deg): | 42.86 N | Area (km2): | 273905 | ||
| Longitude (dec deg): | 97.4 W | Elevation (m): | 347 | ||
| Annual Discharge: (m3/s): | 749.3 | (km3/yr): | 23.7 | ||
| Annual Runoff: (l/s/km2): | 2.7 | (mm/yr): | 86.4 |
| Mean for Observation Period | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
| m3/sec | 348.4 | 372.9 | 600.0 | 1004.6 | 847.6 | 1132.9 | 1058.8 | 877.2 | 845.6 | 825.3 | 694.1 | 379.6 |
| km3/mo | 0.9 | 0.9 | 1.6 | 2.6 | 2.3 | 2.9 | 2.8 | 2.3 | 2.2 | 2.2 | 1.8 | 1.0 |
| mm/mo | 3.4 | 3.3 | 5.9 | 9.5 | 8.3 | 10.7 | 10.4 | 8.6 | 8.0 | 8.1 | 6.6 | 3.7 |
| l/s/km2 | 1.3 | 1.4 | 2.2 | 3.7 | 3.1 | 4.1 | 3.9 | 3.2 | 3.1 | 3.0 | 2.5 | 1.4 |
