MEDIAN FLOW RATE · 1 YEAR
1,179cfs 25.9% vs avg
Optimal band: 1,038–1,404 cfs
PERIOD HIGH
17,728cfs
PERIOD LOW
321cfs
RUNNABLE
13%
last 1 year in band
Precipitation History
Precipitation · YTD
NormalNear-normal year
2026 to date
19.4in
≈ normal
19.36 in of precipitation so far this year — about average for this point in the season (normal 18.15 in).
YTD Total
19.4in
This year so far
Normal to Date
18.1in
30-yr average
Typical Range
13.8–21.8in
10th–90th pct YTD
Departure
+7%
vs 30-yr normal
By Month
This year
Typical range
Normal
Jan: 2.22" · normal 2.38" (1.0–4.2)
Feb: 1.00" · normal 1.96" (0.9–3.4)
Mar: 4.31" · normal 2.39" (1.0–3.6)
Apr: 6.05" · normal 3.82" (2.4–5.7)
May: 1.32" · normal 4.01" (1.9–6.3)
Jun: 4.46" (so far)· normal 3.71" (1.9–5.2)
Jul: normal 3.28" (1.9–4.2)
Aug: normal 3.33" (1.7–5.5)
Sep: normal 2.80" (1.1–4.8)
Oct: normal 3.19" (1.4–5.5)
Nov: normal 2.60" (1.4–4.5)
Dec: normal 2.22" (1.0–3.3)
Baseline 1991–2020 · Source: Open-Meteo07:21 PM
Your History · GRAND RIVER AT IONIA, MI
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Weather Conditions
WEATHER CONDITIONS
TODAY
85°
60°
MON
94°
68°
TUE
91°
76°
WED
92°
76°
THU
93°
75°
FRI
93°
74°
SAT
94°
74°
FISH INDEX
Temperature
Too Hot
Wind
Light
Pressure
Stable
Moon Phase
Peak Activity
DAYLIGHT
SUNRISE
06:03 AM
SUNSET
09:23 PM
15H 20M OF DAYLIGHT1H 4M REMAINING
MOON PHASE
Full Moon
98% illuminated
PEAK ACTIVITY
Station Location
42.9720, -85.0692Loading map…
DATA · USGS · NOAA · NWSUPDATED 2026-06-28 20:19 UTC
Site #04116000·USGS
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