Great Miami River flow

Average flow of the Great Miami River at Dayton, by month, in cubic feet per second.

Great Miami River at Dayton: 1,158 in October 2026. Change from September 2026: −59.3%. From a year earlier: +109.8%.

02,0004,0006,0008,000Nov 2025Jan 2026MarMayJulSepGreat Miami River at Dayton 1,158
02,0004,0006,0008,000Jan ’26MaySepAt Dayton 1,158
02,0004,0006,0008,00010,00020222023202420252026Great Miami River at Dayton 1,158
02,0004,0006,0008,00010,00020222023202420252026At Dayton 1,158
05,00010,00015,00020,00019141917192019231926192919321935193819411944194719501953195619591962196519681971197419771980198319861989199219951998200120042007201020132016201920222025Great Miami River at Dayton 1,158
05,00010,00015,00020,00019141917192019231926192919321935193819411944194719501953195619591962196519681971197419771980198319861989199219951998200120042007201020132016201920222025At Dayton 1,158
Great Miami River at DaytonGreat Miami River flow, April 1913 to October 2026. Source: U.S. Geological Survey, Great Miami River at Dayton, gauge 03270500, daily values.

Next update: November 2026 figures, expected around Dec 2, 2026.

October 2026October 2025Change
Great Miami River at Dayton1,158552+109.8%

About this data

The monthly average of the USGS gauge’s daily mean discharge (cubic feet per second) for the Great Miami River at Dayton, site 03270500, measured since 1913. Recent values are provisional until USGS reviews them, which can take months; months missing more than a few days are left out. Flow is not the same as river height (stage), which is what flood warnings use.

Source: U.S. Geological Survey, Great Miami River at Dayton, gauge 03270500, daily values. Updated November 4, 2026, monthly. Download the data (CSV).

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