About this river
Vermillion River is a 19.3 mile river near Missouri River Outdoors in South Dakota. Streamflow is measured at the USGS gauge Vermillion River near Vermillion,sd (site 06479010). The National Hydrography Dataset places it at stream order 6. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
1984 to 2026
Vermillion River typically runs highest in May, at a median 368 cfs, and lowest in February, at 45 cfs. The highest flow on record for any single day is 30,500 cfs, in 2024.
| Month | Typical (cfs) | Usual range (cfs) | Relative level |
|---|---|---|---|
| January | 50 | 26 to 89 | |
| February | 45 | 24 to 95 | |
| March | 230 | 98 to 958 | |
| April | 348 | 95 to 1,310 | |
| May | 368 | 112 to 998 | |
| June | 336 | 104 to 875 | |
| July | 181 | 56 to 482 | |
| August | 92 | 40 to 195 | |
| September | 80 | 33 to 150 | |
| October | 73 | 39 to 178 | |
| November | 79 | 38 to 180 | |
| December | 58 | 30 to 150 |
Typical is the median of each month’s daily median values, and the usual range runs from the median 25th to the median 75th percentile, across about 43 years of record. Statistics published by the US Geological Survey for Vermillion River near Vermillion,sd (site 06479010). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.
Embed this gauge on your site
Paste this snippet anywhere, an outfitter page, a club site, a trip report, to show Vermillion River's live streamflow, water level and 7-day trend. It reads the USGS gauge directly, updates itself, and links back here.
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