MEDIAN FLOW RATE · 1 YEAR
304cfs 25.0% vs avg
Optimal band: 14–20 cfs
PERIOD HIGH
5,622cfs
PERIOD LOW
1cfs
RUNNABLE
6%
last 1 year in band
Precipitation History
Precipitation · YTD
WetWetter than normal
2026 to date
26.4in
+15% vs normal
26.37 in of precipitation so far this year, 15% above the 30-year normal of 22.93 in for this point in the season.
YTD Total
26.4in
This year so far
Normal to Date
22.9in
30-yr average
Typical Range
16.8–29.4in
10th–90th pct YTD
Departure
+15%
vs 30-yr normal
By Month
This year
Typical range
Normal
Jan: 1.55" · normal 2.94" (1.2–4.8)
Feb: 1.32" · normal 2.54" (1.1–3.9)
Mar: 4.51" · normal 3.86" (2.0–5.7)
Apr: 7.53" · normal 4.76" (2.9–7.4)
May: 5.87" · normal 5.16" (2.7–8.2)
Jun: 5.61" (so far)· normal 4.27" (1.8–6.4)
Jul: normal 3.63" (1.2–6.1)
Aug: normal 3.10" (1.5–6.1)
Sep: normal 3.43" (1.4–6.7)
Oct: normal 3.55" (1.7–5.8)
Nov: normal 3.75" (1.6–6.4)
Dec: normal 2.71" (1.5–4.1)
Baseline 1991–2020 · Source: Open-Meteo12:05 PM
Your History · CAHOKIA CREEK AT EDWARDSVILLE, IL
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Weather Conditions
WEATHER CONDITIONS
TODAY
87°
69°
FRI
83°
70°
SAT
82°
66°
SUN
95°
67°
MON
94°
74°
TUE
95°
77°
WED
95°
78°
FISH INDEX
Temperature
Warm
Wind
Light
Pressure
Stable
Moon Phase
Average
DAYLIGHT
SUNRISE
05:36 AM
SUNSET
08:29 PM
14H 53M OF DAYLIGHT8H 22M REMAINING
MOON PHASE
Waxing Gibbous
79% illuminated
Station Location
38.8244, -89.9747Loading map…
DATA · USGS · NOAA · NWSUPDATED 2026-06-25 12:07 UTC
Site #05587900·USGS
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