USGS · 06019500

RUBY RIVER

USGS · 06019500LIVE

Ruby River above reservoir near Alder, MT

MADISON COUNTY, MT45.1923°N, -112.1428°W Updated 2 hr ago

FLOW RATE

164cfs

AIR TEMP

78°F

WIND

4mph S

FISH INDEX

81SCORE / 100

GREAT · 4 OF 5

1D 7D 30D 1YR

Flow Rate Historical Avg

MEDIAN FLOW RATE · 1 YEAR

164cfs 9.6% vs avg

Optimal band: 100–136 cfs

PERIOD HIGH

374cfs

PERIOD LOW

70cfs

RUNNABLE

52%

last 1 year in band

Precipitation History

Precipitation · YTD

Normal

Near-normal year

2026 to date

11.1in

≈ normal

11.12 in of precipitation so far this year — about average for this point in the season (normal 9.94 in).

YTD Total

11.1in

This year so far

Normal to Date

9.9in

30-yr average

Typical Range

7.8–11.9in

10th–90th pct YTD

Departure

+12%

vs 30-yr normal

By Month

This year

Typical range

Normal

Jan: 0.52" · normal 0.71" (0.4–1.1)

Jan

Feb: 0.70" · normal 0.77" (0.3–1.3)

Feb

Mar: 1.30" · normal 1.08" (0.7–1.7)

Mar

Apr: 2.45" · normal 2.04" (1.5–2.7)

Apr

May: 2.02" · normal 2.58" (1.2–3.8)

May

Jun: 3.89" · normal 2.54" (1.1–4.3)

Jun

Jul: 0.24" (so far)· normal 0.93" (0.3–1.9)

Jul

Aug: normal 0.84" (0.3–1.8)

Aug

Sep: normal 1.30" (0.5–2.4)

Sep

Oct: normal 1.40" (0.7–2.2)

Oct

Nov: normal 1.06" (0.5–1.8)

Nov

Dec: normal 0.92" (0.5–1.4)

Dec

Baseline 1991–2020 · Source: Open-Meteo01:06 AM

Your History · Ruby River above reservoir near Alder, MT

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Station Location

45.1923, -112.1428

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DATA · USGS · NOAA · NWSUPDATED 2026-07-06 00:00 UTC

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