USGS · 06307500

TONGUE RIVER

USGS · 06307500LIVE

Tongue River at Tongue R Dam nr Decker MT

BIG HORN COUNTY, MT45.1413°N, -106.7714°W Updated 16 hr ago

FLOW RATE

325cfs

AIR TEMP

80°F

WIND

5mph S

FISH INDEX

63SCORE / 100

GOOD · 3 OF 5

1D 7D 30D 1YR

Flow Rate Historical Avg

MEDIAN FLOW RATE · 1 YEAR

325cfs 38.9% vs avg

Optimal band: 159–215 cfs

PERIOD HIGH

332cfs

PERIOD LOW

86cfs

RUNNABLE

14%

last 1 year in band

Precipitation History

Precipitation · YTD

Normal

Near-normal year

2026 to date

10.8in

≈ normal

10.75 in of precipitation so far this year — about average for this point in the season (normal 12.04 in).

YTD Total

10.8in

This year so far

Normal to Date

12.0in

30-yr average

Typical Range

8.7–15.4in

10th–90th pct YTD

Departure

-11%

vs 30-yr normal

By Month

This year

Typical range

Normal

Jan: 0.54" · normal 0.90" (0.4–1.3)

Jan

Feb: 0.97" · normal 0.90" (0.5–1.3)

Feb

Mar: 1.77" · normal 1.55" (0.8–2.4)

Mar

Apr: 2.62" · normal 2.63" (1.5–3.8)

Apr

May: 2.12" · normal 3.35" (1.2–5.8)

May

Jun: 2.61" · normal 2.29" (1.2–3.0)

Jun

Jul: 0.12" (so far)· normal 1.26" (0.4–2.7)

Jul

Aug: normal 0.96" (0.3–1.8)

Aug

Sep: normal 1.53" (0.6–2.7)

Sep

Oct: normal 1.98" (1.0–3.1)

Oct

Nov: normal 0.95" (0.3–1.6)

Nov

Dec: normal 0.80" (0.2–1.4)

Dec

Baseline 1991–2020 · Source: Open-Meteo12:44 PM

Your History · Tongue River at Tongue R Dam nr Decker MT

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Station Location

45.1413, -106.7714

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DATA · USGS · NOAA · NWSUPDATED 2026-07-08 00:00 UTC

Site #06307500·USGS

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