Rivermatics

USGS Streamgage 11447650

Sacramento River A Freeport, CA

Sacramento River A Freeport, CA is USGS streamgage 11447650 in California, monitoring river discharge in hydrologic subbasin 18020163. Discharge records at this site go back to 1909. Typical flow runs near 15,183.9 cfs in July and 21,060 cfs in April, with the higher of the two arriving in April.

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Gauge details

State
California
Subbasin (HUC-8)
18020163
Coordinates
38.45566, -121.50162
USGS site number
11447650
Records begin
1909-01-17 (117 years)

Typical flow by month

Long-term daily discharge percentiles from the USGS record (up to 67 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 10,037.7 23,309.7 72,593.5
February 11,434.8 32,469 73,755.2
March 12,264.5 29,800 70,100
April 9,850.3 21,060 64,816.7
May 8,385.8 16,638.7 49,503.2
June 8,516.3 13,726.7 35,230
July 8,658.1 15,183.9 22,483.9
August 8,748.4 14,751.6 20,935.5
September 9,340.7 14,176.7 21,983.3
October 7,440 11,187.1 18,129
November 7,704.3 12,666.7 25,700
December 9,329.7 18,171 59,519.4

All values in cubic feet per second (cfs).

Common questions

When does Sacramento River A Freeport, CA normally run highest?
February, on the long-term record. The median daily flow that month is about 32,469 cfs, against 11,187.1 cfs in October, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
What is a normal flow for Sacramento River A Freeport, CA?
It depends on the month. In January, half of days historically fall near 23,309.7 cfs, with the middle 80% of days between 10,037.7 and 72,593.5 cfs. The month-by-month table on this page gives the full range.
How long has Sacramento River A Freeport, CA been measured?
Discharge records at USGS site 11447650 begin in 1909, about 117 years, covering roughly 7,905 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
Where is Sacramento River A Freeport, CA?
The gauge sits at 38.45566, -121.50162, in California, in hydrologic subbasin 18020163.
Can I use Sacramento River A Freeport, CA 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.

Other gauges in this subbasin