USGS Streamgage 11070365
San Jacinto River near Sun City, CA
San Jacinto River near Sun City, CA is USGS streamgage 11070365 in California, monitoring river discharge in hydrologic subbasin 18070202. It drains a watershed of about 560 square miles. Discharge records at this site go back to 2000. Typical flow runs near 0 cfs in July and 0 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- California
- Drainage area
- 560 sq mi
- Gauge elevation
- 1,398 ft
- Subbasin (HUC-8)
- 18070202
- Coordinates
- 33.74613, -117.2317
- USGS site number
- 11070365
- Records begin
- 2000-08-25 (26 years)
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.
| Month | Low p10 | Typical p50 | High p90 | Range |
|---|---|---|---|---|
| January | 0 | 0 | 65.8 | |
| February | 0 | 0.1 | 85.6 | |
| March | 0 | 0.1 | 38.5 | |
| April | 0 | 0 | 11.9 | |
| May | 0 | 0 | 2.6 | |
| June | 0 | 0 | 0 | |
| July | 0 | 0 | 0 | |
| August | 0 | 0 | 2.5 | |
| September | 0 | 0 | 10.4 | |
| October | 0 | 0 | 2.3 | |
| November | 0 | 0 | 8.1 | |
| December | 0 | 0 | 43.6 |
All values in cubic feet per second (cfs).
Common questions
- When does San Jacinto River near Sun City, CA normally run highest?
- February, on the long-term record. The median daily flow that month is about 0.1 cfs, against 0 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 San Jacinto River near Sun City, CA?
- It depends on the month. In January, half of days historically fall near 0 cfs, with the middle 80% of days between 0 and 65.8 cfs. The month-by-month table on this page gives the full range.
- How long has San Jacinto River near Sun City, CA been measured?
- Discharge records at USGS site 11070365 begin in 2000, about 26 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 Jacinto River near Sun City, CA?
- The gauge sits at 33.74613, -117.2317, in California, in hydrologic subbasin 18070202, at an elevation of about 1,398 feet, draining roughly 560 square miles.
- Can I use San Jacinto River near Sun City, 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.