About this river
Missouri River is a 20.4 mile river near Lake Jacomo Marina in Missouri. Streamflow is measured at the USGS gauge Missouri River at Napoleon, MO (site 06894650). The National Hydrography Dataset places it at stream order 10. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
2015 to 2026
Missouri River typically runs highest in June, at a median 84,750 cfs, and lowest in December, at 32,800 cfs. The highest flow on record for any single day is 305,000 cfs, in 2019.
| Month | Typical (cfs) | Usual range (cfs) | Relative level |
|---|---|---|---|
| January | 33,100 | 23,700 to 60,700 | |
| February | 36,600 | 27,700 to 54,500 | |
| March | 45,300 | 32,100 to 67,700 | |
| April | 55,550 | 43,900 to 89,200 | |
| May | 84,100 | 54,400 to 111,000 | |
| June | 84,750 | 62,000 to 110,000 | |
| July | 70,500 | 53,900 to 96,700 | |
| August | 50,300 | 44,500 to 77,700 | |
| September | 45,950 | 42,600 to 78,750 | |
| October | 46,800 | 42,600 to 66,500 | |
| November | 47,050 | 42,500 to 58,950 | |
| December | 32,800 | 27,700 to 72,100 |
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 11 years of record. Statistics published by the US Geological Survey for Missouri River at Napoleon, MO (site 06894650). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.
Boat access nearby
4 mapped launches sit in the mapped area of Missouri River, all of them public access. Ramp data comes from the USGS national boat-ramp inventory.
Embed this gauge on your site
Paste this snippet anywhere, an outfitter page, a club site, a trip report, to show Missouri 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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