MEDIAN FLOW RATE · 1 YEAR
60cfs 16.0% vs avg
Optimal band: 60–81 cfs
PERIOD HIGH
369cfs
PERIOD LOW
17cfs
RUNNABLE
22%
last 1 year in band
Precipitation History
Precipitation · YTD
NormalNear-normal year
2026 to date
33.6in
≈ normal
33.65 in of precipitation so far this year — about average for this point in the season (normal 39.39 in).
YTD Total
33.6in
This year so far
Normal to Date
39.4in
30-yr average
Typical Range
31.4–48.0in
10th–90th pct YTD
Departure
-15%
vs 30-yr normal
By Month
This year
Typical range
Normal
Jan: 8.00" · normal 9.89" (6.4–14.3)
Feb: 6.00" · normal 6.39" (3.4–8.8)
Mar: 11.70" · normal 8.28" (5.0–12.7)
Apr: 2.71" · normal 6.08" (3.0–8.9)
May: 2.03" · normal 4.52" (1.8–7.0)
Jun: 2.66" · normal 3.58" (1.8–5.5)
Jul: 0.55" (so far)· normal 1.94" (0.5–3.3)
Aug: normal 2.40" (0.4–4.9)
Sep: normal 3.82" (0.8–6.9)
Oct: normal 7.45" (3.1–11.6)
Nov: normal 10.87" (6.7–16.6)
Dec: normal 9.40" (5.2–13.7)
Baseline 1991–2020 · Source: Open-Meteo12:34 AM
Your History · SUMAS RIVER NEAR SUMAS, WA
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Weather Conditions
WEATHER CONDITIONS
TODAY
79°
55°
WED
74°
56°
THU
68°
54°
FRI
68°
55°
SAT
71°
53°
SUN
78°
47°
MON
83°
50°
FISH INDEX
Temperature
Warm
Wind
Moderate
Pressure
Rising — Slow
Moon Phase
Good
DAYLIGHT
SUNRISE
05:13 AM
SUNSET
09:14 PM
16H 1M OF DAYLIGHT
MOON PHASE
Last Quarter
43% illuminated
Station Location
48.9748, -122.2513Loading map…
DATA · USGS · NOAA · NWSUPDATED 2026-04-01 00:00 UTC
Site #12214500·USGS
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