Rivermatics

USGS Streamgage 06935965

Missouri River at St. Charles, MO

Missouri River at St. Charles, MO is USGS streamgage 06935965 in Missouri, monitoring river discharge in hydrologic subbasin 10300200. It sits on the Missouri River, alongside 51 other gauges Rivermatics tracks on the same river. It drains a watershed of about 524,000 square miles. Discharge records at this site go back to 1984. Typical flow runs near 101,677.4 cfs in July and 93,020 cfs in April, with the higher of the two arriving in July. Rivermatics issues a daily machine-learned flow outlook for this gauge, reaching 14 days ahead.

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Gauge details

State
Missouri
Drainage area
524,000 sq mi
Gauge elevation
450 ft
Subbasin (HUC-8)
10300200
Coordinates
38.78719, -90.47181
USGS site number
06935965
Records begin
1984-10-01 (42 years)
Rivermatics forecast
14-day flow outlook

14-day flow forecast

Based on observations through for Missouri River at St. Charles, MO. Each day carries a median estimate and the band the model expects the flow to fall within — not a single number to plan against. Forecasts are re-issued daily; see the live screen for the current outlook.

Forecast daily mean discharge in cubic feet per second, by date
Date Low p10 Expected p50 High p90 Range
45,279 48,370 53,008
43,887 48,027 55,042
42,922 47,679 56,457
42,165 47,322 57,202
41,902 47,768 60,019
41,634 48,419 65,081
41,583 49,220 68,872
41,670 49,880 70,974
41,994 51,359 77,151
42,263 52,434 80,656
42,465 53,195 82,661
42,984 54,645 87,105
43,235 55,594 89,925
43,790 57,697 95,409

All values in cubic feet per second (cfs). Estimates only — do not use them for navigation or for any safety, rescue, or emergency decision.

Typical flow by month

Long-term daily discharge percentiles from the USGS record (up to 26 years of data), averaged within each month. These describe the historical normal range — they are not a forecast and not today's reading.

Historical monthly discharge percentiles in cubic feet per second
Month Low p10 Typical p50 High p90 Range
January 28,900 44,841.9 142,483.9
February 32,353.6 56,758.6 124,857.1
March 37,922.6 72,741.9 202,709.7
April 50,160 93,020 191,200
May 55,622.6 129,193.5 267,387.1
June 54,443.3 132,200 282,566.7
July 48,367.7 101,677.4 242,709.7
August 42,371 70,403.2 176,967.7
September 43,453.3 56,986.7 159,700
October 38,335.5 52,474.2 157,064.5
November 35,166.7 55,130 129,900
December 29,429 46,474.2 121,961.3

All values in cubic feet per second (cfs).

Common questions

When does Missouri River at St. Charles, MO normally run highest?
June, on the long-term record. The median daily flow that month is about 132,200 cfs, against 44,841.9 cfs in January, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
What is a normal flow for Missouri River at St. Charles, MO?
It depends on the month. In January, half of days historically fall near 44,841.9 cfs, with the middle 80% of days between 28,900 and 142,483.9 cfs. The month-by-month table on this page gives the full range.
How long has Missouri River at St. Charles, MO been measured?
Discharge records at USGS site 06935965 begin in 1984, about 42 years, covering roughly 9,198 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
Is there a flow forecast for Missouri River at St. Charles, MO?
Yes. Rivermatics trains a machine-learned model — a temporal-fusion transformer — on this basin's observed flows, weather, and snowpack, and issues a daily flow outlook reaching 14 days ahead: a median estimate inside a confidence band, not a single number to bet on. Every forecast is scored against days the model never trained on, and that track record is published on the live gauge screen. Open live conditions to see the current outlook.
Where is Missouri River at St. Charles, MO?
The gauge sits at 38.78719, -90.47181, in Missouri, in hydrologic subbasin 10300200, at an elevation of about 450 feet, draining roughly 524,000 square miles.
Can I use Missouri River at St. Charles, MO data for flood or safety decisions?
No. Rivermatics provides estimates, not guarantees, and the readings and forecasts here may be delayed, inaccurate, or wrong. Do not use them for navigation or for any safety, rescue, or emergency decision. Check the National Weather Service and USGS directly, and use your own judgment.

Upstream and downstream on the Missouri River

Every gauge Rivermatics tracks on this river, ordered by drainage area — upstream first. See the Missouri River in full.

Other gauges in this subbasin