MEDIAN FLOW RATE · 1 YEAR
327cfs 13.6% vs avg
Optimal band: 139–187 cfs
PERIOD HIGH
3,879cfs
PERIOD LOW
59cfs
RUNNABLE
42%
last 1 year in band
Precipitation History
Precipitation · YTD
WetWetter than normal
2026 to date
11.4in
+26% vs normal
11.43 in of precipitation so far this year, 26% above the 30-year normal of 9.09 in for this point in the season.
YTD Total
11.4in
This year so far
Normal to Date
9.1in
30-yr average
Typical Range
6.6–11.6in
10th–90th pct YTD
Departure
+26%
vs 30-yr normal
By Month
This year
Typical range
Normal
Jan: 0.23" · normal 0.61" (0.2–1.0)
Feb: 0.51" · normal 0.58" (0.2–1.0)
Mar: 2.18" · normal 0.81" (0.4–1.3)
Apr: 1.77" · normal 1.83" (1.1–2.7)
May: 2.49" · normal 2.44" (1.4–4.0)
Jun: 4.14" · normal 2.53" (1.2–4.0)
Jul: 0.11" (so far)· normal 0.78" (0.1–1.9)
Aug: normal 1.05" (0.2–2.5)
Sep: normal 1.23" (0.3–1.9)
Oct: normal 1.08" (0.4–2.0)
Nov: normal 0.75" (0.3–1.2)
Dec: normal 0.62" (0.2–1.3)
Baseline 1991–2020 · Source: Open-Meteo12:34 AM
Your History · Sun River at Simms MT
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Weather Conditions
WEATHER CONDITIONS
TODAY
83°
55°
WED
89°
57°
THU
84°
56°
FRI
89°
54°
SAT
98°
60°
SUN
94°
63°
MON
95°
61°
FISH INDEX
Temperature
Warm
Wind
Calm
Pressure
Stable
Moon Phase
Good
DAYLIGHT
SUNRISE
05:38 AM
SUNSET
09:26 PM
15H 48M OF DAYLIGHT
MOON PHASE
Last Quarter
43% illuminated
Station Location
47.5016, -111.9319Loading map…
DATA · USGS · NOAA · NWSUPDATED 2026-07-08 00:00 UTC
Site #06085800·USGS
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