USGS · 05387500

UPPER IOWA RIVER

USGS · 05387500LIVE

Upper Iowa River at Decorah, IA

DECORAH, IA43.3049°N, -91.7955°W Updated 22 hr ago

FLOW RATE

1,503cfs

1D 7D 30D 1YR

Flow Rate Historical Avg

MEDIAN FLOW RATE · 1 YEAR

1,503cfs 3.5% vs avg

Optimal band: 339–459 cfs

PERIOD HIGH

8,371cfs

PERIOD LOW

84cfs

RUNNABLE

17%

last 1 year in band

Precipitation History

Precipitation · YTD

Wet

Wetter than normal

2026 to date

26.5in

+34% vs normal

26.49 in of precipitation so far this year, 34% above the 30-year normal of 19.81 in for this point in the season.

YTD Total

26.5in

This year so far

Normal to Date

19.8in

30-yr average

Typical Range

15.9–25.3in

10th–90th pct YTD

Departure

+34%

vs 30-yr normal

By Month

This year

Typical range

Normal

Jan: 1.66" · normal 1.35" (0.6–2.2)

Jan

Feb: 1.41" · normal 1.38" (0.7–2.1)

Feb

Mar: 2.22" · normal 2.41" (1.2–4.6)

Mar

Apr: 6.74" · normal 4.10" (2.3–6.0)

Apr

May: 4.48" · normal 4.60" (2.7–7.0)

May

Jun: 8.07" · normal 4.96" (3.2–7.2)

Jun

Jul: 1.91" (so far)· normal 3.89" (1.9–4.9)

Jul

Aug: normal 3.80" (1.9–6.4)

Aug

Sep: normal 3.43" (1.1–5.7)

Sep

Oct: normal 2.65" (1.0–4.4)

Oct

Nov: normal 2.05" (0.7–3.5)

Nov

Dec: normal 1.65" (0.7–2.8)

Dec

Baseline 1991–2020 · Source: Open-Meteo10:37 PM

Your History · Upper Iowa River at Decorah, IA

Track your history

Station Location

43.3049, -91.7955

Loading map…

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

Site #05387500·USGS

Create a free account to save favorites, set flow alerts, and track conditions