MEDIAN FLOW RATE · 30 DAY
2,826cfs 8.4% vs avg
Optimal band: 2,741–3,709 cfs
PERIOD HIGH
7,456cfs
PERIOD LOW
1,987cfs
RUNNABLE
26%
last 30 day in band
Precipitation History
Precipitation · YTD
NormalNear-normal year
2026 to date
20.6in
≈ normal
20.59 in of precipitation so far this year — about average for this point in the season (normal 19.94 in).
YTD Total
20.6in
This year so far
Normal to Date
19.9in
30-yr average
Typical Range
15.2–26.4in
10th–90th pct YTD
Departure
+3%
vs 30-yr normal
By Month
This year
Typical range
Normal
Jan: 1.18" · normal 1.44" (0.8–2.4)
Feb: 0.38" · normal 1.69" (0.6–2.9)
Mar: 3.24" · normal 2.62" (1.1–4.9)
Apr: 6.72" · normal 4.47" (2.4–6.6)
May: 2.15" · normal 4.95" (2.7–8.3)
Jun: 6.91" (so far)· normal 4.93" (2.3–7.8)
Jul: normal 3.72" (1.6–6.8)
Aug: normal 3.84" (1.3–7.3)
Sep: normal 3.85" (1.9–6.3)
Oct: normal 2.89" (1.1–4.9)
Nov: normal 2.28" (1.0–3.5)
Dec: normal 1.79" (0.8–3.1)
Baseline 1991–2020 · Source: Open-Meteo02:34 PM
Your History · Iowa River at Marengo, IA
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Weather Conditions
WEATHER CONDITIONS
TODAY
92°
76°
TUE
95°
77°
WED
89°
74°
THU
90°
75°
FRI
89°
72°
SAT
91°
74°
SUN
87°
69°
FISH INDEX
Temperature
Too Hot
Wind
Moderate
Pressure
Stable
Moon Phase
Peak Activity
DAYLIGHT
SUNRISE
05:36 AM
SUNSET
08:47 PM
15H 11M OF DAYLIGHT5H 8M REMAINING
MOON PHASE
Full Moon
100% illuminated
PEAK ACTIVITY
Station Location
41.8127, -92.0648Loading map…
DATA · USGS · NOAA · NWSUPDATED 2026-06-29 15:38 UTC
Site #05453100·USGS
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