About this river
Missouri River is a 10.2 mile river near Upper Missouri River Guides in Montana. Streamflow is measured at the USGS gauge Missouri River near Great Falls MT (site 06090300). The National Hydrography Dataset places it at stream order 7. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
1957 to 2026
Missouri River typically runs highest in June, at a median 11,300 cfs, and lowest in September, at 5,115 cfs. The highest flow on record for any single day is 63,400 cfs, in 1964.
| Month | Typical (cfs) | Usual range (cfs) | Relative level |
|---|---|---|---|
| January | 5,820 | 4,800 to 6,960 | |
| February | 6,010 | 4,960 to 7,140 | |
| March | 6,030 | 4,920 to 7,710 | |
| April | 6,685 | 5,185 to 8,730 | |
| May | 9,290 | 6,670 to 13,100 | |
| June | 11,300 | 7,070 to 18,050 | |
| July | 6,200 | 4,940 to 8,420 | |
| August | 5,380 | 4,630 to 6,800 | |
| September | 5,115 | 4,255 to 6,060 | |
| October | 5,270 | 4,370 to 6,040 | |
| November | 5,460 | 4,580 to 6,615 | |
| December | 5,730 | 4,640 to 6,730 |
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 69 years of record. Statistics published by the US Geological Survey for Missouri River near Great Falls MT (site 06090300). 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 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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