USGS Streamgage 11274000
San Joaquin River near Newman, CA
San Joaquin River near Newman, CA is USGS streamgage 11274000 in California, monitoring river discharge in hydrologic subbasin 18040002. It drains a watershed of about 9,520 square miles. Discharge records at this site go back to 1868. Typical flow runs near 374.5 cfs in July and 841.2 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- California
- Drainage area
- 9,520 sq mi
- Gauge elevation
- 2 ft
- Subbasin (HUC-8)
- 18040002
- Coordinates
- 37.35047, -120.97711
- USGS site number
- 11274000
- Records begin
- 1868-01-02 (158 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 83 years of data), averaged within each month. These describe the historical normal range — they are not a forecast and not today's reading.
| Month | Low p10 | Typical p50 | High p90 | Range |
|---|---|---|---|---|
| January | 366.9 | 819.6 | 5,486.5 | |
| February | 387.4 | 983 | 6,844.5 | |
| March | 349.9 | 1,089.5 | 8,428.1 | |
| April | 297.1 | 841.2 | 12,140 | |
| May | 250.9 | 782.1 | 10,706.5 | |
| June | 162.9 | 547.2 | 7,377.7 | |
| July | 127 | 374.5 | 2,123.9 | |
| August | 126.5 | 380.5 | 1,028.4 | |
| September | 116.1 | 408.9 | 1,282.7 | |
| October | 134.1 | 487.2 | 1,509.4 | |
| November | 204.5 | 536.3 | 1,133.7 | |
| December | 240.3 | 612.4 | 1,755.8 |
All values in cubic feet per second (cfs).
Common questions
- When does San Joaquin River near Newman, CA normally run highest?
- March, on the long-term record. The median daily flow that month is about 1,089.5 cfs, against 374.5 cfs in July, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
- What is a normal flow for San Joaquin River near Newman, CA?
- It depends on the month. In January, half of days historically fall near 819.6 cfs, with the middle 80% of days between 366.9 and 5,486.5 cfs. The month-by-month table on this page gives the full range.
- How long has San Joaquin River near Newman, CA been measured?
- Discharge records at USGS site 11274000 begin in 1868, about 158 years, covering roughly 9,126 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Where is San Joaquin River near Newman, CA?
- The gauge sits at 37.35047, -120.97711, in California, in hydrologic subbasin 18040002, at an elevation of about 2 feet, draining roughly 9,520 square miles.
- Can I use San Joaquin River near Newman, 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.