MEDIAN FLOW RATE · 30 DAY
250cfs 56.6% vs avg
Optimal band: 166–224 cfs
PERIOD HIGH
907cfs
PERIOD LOW
98cfs
RUNNABLE
19%
last 30 day in band
Precipitation History
Precipitation · YTD
NormalNear-normal year
2026 to date
22.9in
≈ normal
22.88 in of precipitation so far this year — about average for this point in the season (normal 21.11 in).
YTD Total
22.9in
This year so far
Normal to Date
21.1in
30-yr average
Typical Range
16.5–25.8in
10th–90th pct YTD
Departure
+8%
vs 30-yr normal
By Month
This year
Typical range
Normal
Jan: 1.31" · normal 1.32" (0.8–2.0)
Feb: 0.77" · normal 1.52" (0.5–2.4)
Mar: 2.45" · normal 2.53" (1.1–4.5)
Apr: 7.37" · normal 4.42" (3.0–7.0)
May: 3.08" · normal 5.08" (2.9–8.3)
Jun: 6.42" · normal 5.10" (2.2–8.7)
Jul: 1.47" (so far)· normal 3.89" (1.6–5.5)
Aug: normal 4.04" (1.3–7.3)
Sep: normal 3.74" (1.4–6.7)
Oct: normal 2.85" (0.9–4.9)
Nov: normal 2.11" (0.8–4.4)
Dec: normal 1.64" (0.6–2.7)
Baseline 1991–2020 · Source: Open-Meteo08:51 AM
Your History · Timber Creek near Marshalltown, IA
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Weather Conditions
WEATHER CONDITIONS
TODAY
90°
70°
THU
84°
71°
FRI
81°
69°
SAT
84°
69°
SUN
84°
69°
MON
83°
69°
TUE
85°
67°
FISH INDEX
Temperature
Warm
Wind
Light
Pressure
Stable
Moon Phase
Good
DAYLIGHT
SUNRISE
05:44 AM
SUNSET
08:48 PM
15H 4M OF DAYLIGHT
MOON PHASE
Last Quarter
39% illuminated
Station Location
42.0089, -92.8524Loading map…
DATA · USGS · NOAA · NWSUPDATED 2026-07-08 00:00 UTC
Site #05451700·USGS
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