MEDIAN FLOW RATE · 30 DAY
—cfs
No flow data available
Precipitation History
Precipitation · YTD
NormalNear-normal year
2026 to date
21.0in
≈ normal
20.99 in of precipitation so far this year — about average for this point in the season (normal 18.79 in).
YTD Total
21.0in
This year so far
Normal to Date
18.8in
30-yr average
Typical Range
13.2–23.4in
10th–90th pct YTD
Departure
+12%
vs 30-yr normal
By Month
This year
Typical range
Normal
Jan: 2.00" · normal 2.28" (1.2–3.8)
Feb: 0.66" · normal 2.09" (0.8–3.7)
Mar: 3.73" · normal 2.62" (1.5–4.3)
Apr: 6.45" · normal 4.08" (2.4–6.3)
May: 1.32" · normal 4.24" (1.7–6.3)
Jun: 6.84" (so far)· normal 3.80" (1.5–6.1)
Jul: normal 3.63" (2.0–5.3)
Aug: normal 3.75" (1.8–5.5)
Sep: normal 3.05" (1.2–5.5)
Oct: normal 3.38" (1.6–6.5)
Nov: normal 2.66" (1.4–4.3)
Dec: normal 2.30" (1.1–3.9)
Baseline 1991–2020 · Source: Open-Meteo01:37 AM
Your History · CHICAGO RIVER AT CHICAGO LOCK AT CHICAGO, IL
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Weather Conditions
WEATHER CONDITIONS
TODAY
76°
62°
FRI
70°
63°
SAT
73°
65°
SUN
84°
64°
MON
93°
75°
TUE
95°
77°
WED
97°
79°
FISH INDEX
Temperature
Ideal
Wind
Light
Pressure
Stable
Moon Phase
Average
DAYLIGHT
SUNRISE
05:16 AM
SUNSET
08:29 PM
15H 13M OF DAYLIGHT17H 20M REMAINING
MOON PHASE
Waxing Gibbous
84% illuminated
Station Location
41.8893, -87.6079Loading map…
DATA · USGS · NOAA · NWSUPDATED 2026-06-26 03:09 UTC
Site #05536121·USGS
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