MEDIAN FLOW RATE · 7 DAY
46cfs 28.3% vs avg
Optimal band: 41–55 cfs
PERIOD HIGH
56cfs
PERIOD LOW
39cfs
RUNNABLE
75%
last 7 day in band
Precipitation History
Precipitation · YTD
NormalNear-normal year
2026 to date
21.2in
≈ normal
21.2 in of precipitation so far this year — about average for this point in the season (normal 20.13 in).
YTD Total
21.2in
This year so far
Normal to Date
20.1in
30-yr average
Typical Range
14.1–24.3in
10th–90th pct YTD
Departure
+5%
vs 30-yr normal
By Month
This year
Typical range
Normal
Jan: 1.81" · normal 2.50" (1.1–4.1)
Feb: 0.58" · normal 2.14" (0.8–3.5)
Mar: 4.10" · normal 2.91" (1.6–5.3)
Apr: 6.26" · normal 4.21" (2.5–6.4)
May: 0.99" · normal 4.57" (2.4–6.5)
Jun: 7.46" (so far)· normal 4.12" (2.1–6.6)
Jul: normal 4.01" (2.4–6.2)
Aug: normal 3.86" (2.3–5.1)
Sep: normal 3.24" (1.1–5.8)
Oct: normal 3.39" (1.7–6.1)
Nov: normal 2.85" (1.8–4.6)
Dec: normal 2.27" (1.2–3.6)
Baseline 1991–2020 · Source: Open-Meteo07:21 PM
Your History · GRAND CALUMET RIVER AT COLUMBIA AV AT HAMMOND, IN
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Weather Conditions
WEATHER CONDITIONS
TODAY
81°
63°
MON
94°
74°
TUE
95°
76°
WED
97°
78°
THU
97°
79°
FRI
95°
78°
SAT
97°
77°
FISH INDEX
Temperature
Warm
Wind
Light
Pressure
Stable
Moon Phase
Peak Activity
DAYLIGHT
SUNRISE
05:18 AM
SUNSET
08:28 PM
15H 10M OF DAYLIGHT0H 10M REMAINING
MOON PHASE
Full Moon
98% illuminated
PEAK ACTIVITY
Station Location
41.6186, -87.4998Loading map…
DATA · USGS · NOAA · NWSUPDATED 2026-06-28 20:18 UTC
Site #05536356·USGS
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