USGS · 11073300

SAN ANTONIO C A RIVER

USGS · 11073300LIVE

SAN ANTONIO C A RIVERSIDE DRIVE NR CHINO CA

SAN BERNARDINO COUNTY, CA34.0186°N, -117.7306°W Updated 17 hr ago

FLOW RATE

2cfs

1D 7D 30D 1YR

Flow Rate Historical Avg

MEDIAN FLOW RATE · 1 YEAR

2cfs 66.7% vs avg

Optimal band: 2–2 cfs

PERIOD HIGH

200cfs

PERIOD LOW

1cfs

RUNNABLE

21%

last 1 year in band

Precipitation History

Precipitation · YTD

Dry

Drier than normal

2026 to date

7.6in

-34% vs normal

7.56 in of precipitation so far this year, 34% below the 30-year normal of 11.42 in for this point in the season.

YTD Total

7.6in

This year so far

Normal to Date

11.4in

30-yr average

Typical Range

3.3–23.6in

10th–90th pct YTD

Departure

-34%

vs 30-yr normal

By Month

This year

Typical range

Normal

Jan: 2.67" · normal 3.59" (0.4–8.9)

Jan

Feb: 3.43" · normal 3.92" (0.5–7.9)

Feb

Mar: 0.17" · normal 2.38" (0.3–4.6)

Mar

Apr: 1.02" · normal 0.99" (0.1–2.1)

Apr

May: 0.19" · normal 0.43" (0.0–0.9)

May

Jun: 0.06" · normal 0.10" (0.0–0.2)

Jun

Jul: 0.01" (so far)· normal 0.07" (0.0–0.1)

Jul

Aug: normal 0.03" (0.0–0.1)

Aug

Sep: normal 0.17" (0.0–0.6)

Sep

Oct: normal 0.77" (0.0–1.4)

Oct

Nov: normal 1.00" (0.1–2.6)

Nov

Dec: normal 2.48" (0.5–4.6)

Dec

Baseline 1991–2020 · Source: Open-Meteo04:04 PM

Your History · SAN ANTONIO C A RIVERSIDE DRIVE NR CHINO CA

Track your history

Sign in to track your sessions at SAN ANTONIO C A RIVERSIDE DRIVE NR CHINO CA — best days, monthly trends, and time on the water.

Station Location

34.0186, -117.7306

Loading map…

DATA · USGS · NOAA · NWSUPDATED 2026-07-07 00:00 UTC

Site #11073300·USGS

Create a free account to save favorites, set flow alerts, and track conditions