MEDIAN FLOW RATE · 1 YEAR
97cfs 16.3% vs avg
Optimal band: 483–653 cfs
PERIOD HIGH
16,424cfs
PERIOD LOW
33cfs
RUNNABLE
5%
last 1 year in band
Gauge Height
193.01ft
Weather Map
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Precipitation History
Precipitation · YTD
NormalNear-normal year
2026 to date
24.7in
≈ normal
24.69 in of precipitation so far this year — about average for this point in the season (normal 29 in).
YTD Total
24.7in
This year so far
Normal to Date
29.0in
30-yr average
Typical Range
21.8–36.1in
10th–90th pct YTD
Departure
-15%
vs 30-yr normal
By Month
This year
Typical range
Normal
Jan: 5.73" · normal 7.33" (4.4–10.4)
Feb: 4.66" · normal 5.35" (2.7–8.1)
Mar: 7.83" · normal 6.11" (3.5–10.1)
Apr: 3.27" · normal 4.80" (2.3–7.2)
May: 1.60" · normal 3.06" (1.0–4.8)
Jun: 1.51" · normal 1.98" (0.9–3.2)
Jul: 0.09" (so far)· normal 0.67" (0.1–1.2)
Aug: normal 1.00" (0.2–2.0)
Sep: normal 2.10" (0.2–3.8)
Oct: normal 4.97" (2.2–7.6)
Nov: normal 8.12" (4.0–12.4)
Dec: normal 7.81" (3.8–11.4)
Baseline 1991–2020 · Source: Open-Meteo22:38 UTC
Your History · CHEHALIS RIVER NEAR ADNA, WA
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Station Location
46.6257, -123.1018Loading map…
DATA · USGS · NOAA · NWSUPDATED 2026-07-13 00:00 UTC
Site #12021800·USGS
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