MEDIAN FLOW RATE · 30 DAY
48cfs 70.7% vs avg
Optimal band: 116–158 cfs
PERIOD HIGH
425cfs
PERIOD LOW
48cfs
RUNNABLE
27%
last 30 day in band
Precipitation History
Precipitation · YTD
DryDrier than normal
2026 to date
8.7in
-31% vs normal
8.69 in of precipitation so far this year, 31% below the 30-year normal of 12.57 in for this point in the season.
YTD Total
8.7in
This year so far
Normal to Date
12.6in
30-yr average
Typical Range
10.6–14.7in
10th–90th pct YTD
Departure
-31%
vs 30-yr normal
By Month
This year
Typical range
Normal
Jan: 0.52" · normal 0.89" (0.6–1.3)
Feb: 1.04" · normal 0.95" (0.4–1.7)
Mar: 1.86" · normal 1.41" (0.9–2.1)
Apr: 2.36" · normal 2.38" (1.7–3.1)
May: 2.16" · normal 3.40" (2.4–4.5)
Jun: 0.74" (so far)· normal 3.98" (2.2–5.8)
Jul: normal 1.99" (0.6–3.5)
Aug: normal 1.52" (0.6–2.6)
Sep: normal 1.55" (0.5–2.5)
Oct: normal 1.50" (0.8–2.4)
Nov: normal 1.20" (0.6–1.9)
Dec: normal 1.06" (0.5 –1.7)
Baseline 1991–2020 · Source: Open-Meteo12:07 AM
Your History · Boulder River near Boulder, MT
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Weather Conditions
WEATHER CONDITIONS
TODAY
79°
50°
THU
81°
56°
FRI
72°
51°
SAT
62°
46°
SUN
56°
44°
MON
65°
42°
TUE
77°
45°
FISH INDEX
Temperature
Warm
Wind
Moderate
Pressure
Falling — Active
Moon Phase
Average
DAYLIGHT
SUNRISE
05:37 AM
SUNSET
09:24 PM
15H 47M OF DAYLIGHT21H 16M REMAINING
MOON PHASE
Waxing Gibbous
74% illuminated
Station Location
46.2110, -112.0917Loading map…
DATA · USGS · NOAA · NWSUPDATED 2026-06-25 00:08 UTC
Site #06033000·USGS
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