USGS · 06079000

SOUTH FORK SUN

USGS · 06079000LIVE

South Fork Sun River near Augusta MT

LEWIS AND CLARK COUNTY, MT47.6286°N, -112.8658°W Updated 14 hr ago

FLOW RATE

452cfs

1D 7D 30D 1YR

Flow Rate Historical Avg

MEDIAN FLOW RATE · 1 YEAR

452cfs 27.8% vs avg

Optimal band: 107–145 cfs

PERIOD HIGH

2,493cfs

PERIOD LOW

45cfs

RUNNABLE

12%

last 1 year in band

Precipitation History

Precipitation · YTD

Normal

Near-normal year

2026 to date

16.0in

≈ normal

16.02 in of precipitation so far this year — about average for this point in the season (normal 14.98 in).

YTD Total

16.0in

This year so far

Normal to Date

15.0in

30-yr average

Typical Range

11.4–18.2in

10th–90th pct YTD

Departure

+7%

vs 30-yr normal

By Month

This year

Typical range

Normal

Jan: 0.75" · normal 1.50" (0.8–2.2)

Jan

Feb: 1.48" · normal 1.48" (0.4–2.7)

Feb

Mar: 4.15" · normal 1.78" (0.8–2.9)

Mar

Apr: 2.03" · normal 2.46" (1.7–3.5)

Apr

May: 3.04" · normal 3.35" (2.0–4.7)

May

Jun: 4.46" · normal 3.92" (2.1–5.9)

Jun

Jul: 0.10" (so far)· normal 1.80" (0.4–3.8)

Jul

Aug: normal 1.74" (0.6–2.9)

Aug

Sep: normal 1.71" (0.6–2.5)

Sep

Oct: normal 1.81" (0.8–3.1)

Oct

Nov: normal 1.62" (0.8–2.8)

Nov

Dec: normal 1.50" (0.8–2.4)

Dec

Baseline 1991–2020 · Source: Open-Meteo01:21 PM

Your History · South Fork Sun River near Augusta MT

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Station Location

47.6286, -112.8658

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

Site #06079000·USGS

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