USGS · 08172000

SAN MARCOS RV RIVER

USGS · 08172000LIVE

San Marcos Rv at Luling, TX

LULING, TX29.6663°N, -97.6509°W Updated 16 hr ago

FLOW RATE

101cfs

1D 7D 30D 1YR

Flow Rate Historical Avg

MEDIAN FLOW RATE · 30 DAY

101cfs 39.2% vs avg

Optimal band: 93–125 cfs

PERIOD HIGH

528cfs

PERIOD LOW

94cfs

RUNNABLE

68%

last 30 day in band

Precipitation History

Precipitation · YTD

Wet

Wetter than normal

2026 to date

30.0in

+54% vs normal

29.98 in of precipitation so far this year, 54% above the 30-year normal of 19.42 in for this point in the season.

YTD Total

30.0in

This year so far

Normal to Date

19.4in

30-yr average

Typical Range

11.4–30.9in

10th–90th pct YTD

Departure

+54%

vs 30-yr normal

By Month

This year

Typical range

Normal

Jan: 1.61" · normal 2.62" (0.8–4.7)

Jan

Feb: 0.92" · normal 2.44" (0.9–4.2)

Feb

Mar: 1.82" · normal 3.11" (1.4–4.8)

Mar

Apr: 10.90" · normal 3.31" (0.9–6.1)

Apr

May: 8.00" · normal 4.46" (1.2–8.0)

May

Jun: 6.56" · normal 2.87" (0.5–5.2)

Jun

Jul: 0.17" (so far)· normal 1.72" (0.5–3.1)

Jul

Aug: normal 2.32" (0.2–5.0)

Aug

Sep: normal 2.94" (0.8–5.0)

Sep

Oct: normal 3.25" (1.0–8.3)

Oct

Nov: normal 2.86" (0.7–4.4)

Nov

Dec: normal 2.77" (0.7–5.2)

Dec

Baseline 1991–2020 · Source: Open-Meteo03:23 PM

Your History · San Marcos Rv at Luling, TX

Track your history

Station Location

29.6663, -97.6509

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

Site #08172000·USGS

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