MEDIAN FLOW RATE · 1 YEAR
151cfs 51.3% vs avg
Optimal band: 59–79 cfs
PERIOD HIGH
291cfs
PERIOD LOW
30cfs
RUNNABLE
25%
last 1 year in band
Precipitation History
Precipitation · YTD
DryDrier than normal
2026 to date
8.0in
-20% vs normal
8.02 in of precipitation so far this year, 20% below the 30-year normal of 9.99 in for this point in the season.
YTD Total
8.0in
This year so far
Normal to Date
10.0in
30-yr average
Typical Range
7.6–12.8in
10th–90th pct YTD
Departure
-20%
vs 30-yr normal
By Month
This year
Typical range
Normal
Jan: 0.66" · normal 0.71" (0.3–1.2)
Feb: 1.52" · normal 0.67" (0.3–1.1)
Mar: 1.38" · normal 1.07" (0.4–1.7)
Apr: 1.43" · normal 2.19" (1.2–3.2)
May: 1.47" · normal 2.70" (1.2–5.4)
Jun: 1.50" · normal 2.45" (1.1–4.7)
Jul: 0.06" (so far)· normal 1.19" (0.2–1.8)
Aug: normal 1.04" (0.2–2.2)
Sep: normal 1.29" (0.4–2.3)
Oct: normal 1.36" (0.5–2.2)
Nov: normal 0.78" (0.3–1.3)
Dec: normal 0.70" (0.3–1.4)
Baseline 1991–2020 · Source: Open-Meteo06:07 AM
Your History · Musselshell River near Roundup MT
Track your history
Sign in to track your sessions at Musselshell River near Roundup MT — best days, monthly trends, and time on the water.
Sign inSPONSORED
Weather Conditions
WEATHER CONDITIONS
TODAY
86°
52°
SAT
91°
56°
SUN
93°
66°
MON
86°
66°
TUE
86°
66°
WED
96°
64°
THU
93°
67°
FISH INDEX
Temperature
Ideal
Wind
Light
Pressure
Rising — Slow
Moon Phase
Average
DAYLIGHT
SUNRISE
05:27 AM
SUNSET
09:09 PM
15H 42M OF DAYLIGHT9H 14M REMAINING
MOON PHASE
Waning Gibbous
87% illuminated
Station Location
46.4277, -108.5701Loading map…
DATA · USGS · NOAA · NWSUPDATED 2026-07-03 11:55 UTC
Site #06126500·USGS
Create a free account to save favorites, set flow alerts, and track conditions