CO DWR · SBCABCCO

SOUTH BOULDER CREEK

CO DWR · SBCABCCOLIVE

South Boulder Creek Below Valmont Reservoir Inlet

BOULDER, CO40.0221°N, -105.2153°W Updated 1 d ago

FLOW RATE

1cfs

1D 7D 30D 1YR

Flow Rate Historical Avg

MEDIAN FLOW RATE · 1 YEAR

1cfs

Optimal band: 1–1 cfs

PERIOD HIGH

4cfs

PERIOD LOW

1cfs

RUNNABLE

92%

last 1 year in band

Precipitation History

Precipitation · YTD

Dry

Drier than normal

2026 to date

7.8in

-45% vs normal

7.82 in of precipitation so far this year, 45% below the 30-year normal of 14.21 in for this point in the season.

YTD Total

7.8in

This year so far

Normal to Date

14.2in

30-yr average

Typical Range

9.6–17.6in

10th–90th pct YTD

Departure

-45%

vs 30-yr normal

By Month

This year

Typical range

Normal

Jan: 0.88" · normal 0.94" (0.4–1.7)

Jan

Feb: 0.60" · normal 1.02" (0.3–1.6)

Feb

Mar: 1.60" · normal 1.96" (1.1–3.0)

Mar

Apr: 0.93" · normal 3.02" (1.4–4.4)

Apr

May: 2.97" · normal 3.88" (2.2–5.8)

May

Jun: 0.73" · normal 2.90" (1.2–4.9)

Jun

Jul: 0.11" (so far)· normal 2.78" (1.2–4.3)

Jul

Aug: normal 2.64" (1.2–4.1)

Aug

Sep: normal 2.06" (0.5–3.3)

Sep

Oct: normal 1.82" (0.8–3.0)

Oct

Nov: normal 1.27" (0.7–2.3)

Nov

Dec: normal 0.88" (0.3–1.5)

Dec

Baseline 1991–2020 · Source: Open-Meteo10:03 AM

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Station Location

40.0221, -105.2153

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DATA · CO DWR · NOAA · NWSUPDATED 2026-07-06 00:00 UTC

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