MEDIAN FLOW RATE · 1 YEAR
93cfs 23.8% vs avg
Optimal band: 26–35 cfs
PERIOD HIGH
461cfs
PERIOD LOW
11cfs
RUNNABLE
10%
last 1 year in band
Precipitation History
Precipitation · YTD
NormalNear-normal year
2026 to date
20.9in
≈ normal
20.93 in of precipitation so far this year — about average for this point in the season (normal 20.21 in).
YTD Total
20.9in
This year so far
Normal to Date
20.2in
30-yr average
Typical Range
15.6–24.8in
10th–90th pct YTD
Departure
+4%
vs 30-yr normal
By Month
This year
Typical range
Normal
Jan: 1.46" · normal 3.48" (2.0–5.2)
Feb: 2.40" · normal 2.86" (1.2–4.3)
Mar: 5.82" · normal 3.19" (1.9–5.3)
Apr: 3.17" · normal 3.15" (2.1–4.5)
May: 3.61" · normal 3.22" (2.2–4.3)
Jun: 4.34" · normal 3.81" (2.3–5.3)
Jul: 0.14" (so far)· normal 1.41" (0.4–2.9)
Aug: normal 1.43" (0.5–2.5)
Sep: normal 2.04" (0.7–3.8)
Oct: normal 2.94" (1.1–4.9)
Nov: normal 3.41" (1.9–5.1)
Dec: normal 3.47" (2.2–5.0)
Baseline 1991–2020 · Source: Open-Meteo10:53 AM
Your History · South Fork Jocko River near Arlee MT
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Station Location
47.1955, -113.8507Loading map…
DATA · USGS · NOAA · NWSUPDATED 2026-07-07 00:00 UTC
Site #12381400·USGS
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