About this river
Great Miami River is a 16.4 mile river near NBD Fishing Inc. in Ohio. Streamflow is measured at the USGS gauge Great Miami River at Hamilton OH (site 03274000). The National Hydrography Dataset places it at stream order 8. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
1927 to 2026
Great Miami River typically runs highest in March, at a median 4,410 cfs, and lowest in September, at 717 cfs. The highest flow on record for any single day is 73,900 cfs, in 1959.
| Month | Typical (cfs) | Usual range (cfs) | Relative level |
|---|---|---|---|
| January | 2,420 | 1,300 to 5,360 | |
| February | 3,230 | 1,920 to 6,220 | |
| March | 4,410 | 2,690 to 7,980 | |
| April | 4,045 | 2,600 to 7,120 | |
| May | 2,810 | 1,790 to 5,130 | |
| June | 2,090 | 1,300 to 3,710 | |
| July | 1,370 | 921 to 2,360 | |
| August | 951 | 677 to 1,380 | |
| September | 717 | 512 to 1,085 | |
| October | 729 | 534 to 1,140 | |
| November | 994 | 676 to 1,885 | |
| December | 1,690 | 883 to 3,790 |
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 99 years of record. Statistics published by the US Geological Survey for Great Miami River at Hamilton OH (site 03274000). 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 Great Miami 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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