MEDIAN FLOW RATE · 1 DAY
—cfs
No flow data available
Precipitation History
Precipitation · YTD
WetWetter than normal
2026 to date
28.7in
+26% vs normal
28.74 in of precipitation so far this year, 26% above the 30-year normal of 22.88 in for this point in the season.
YTD Total
28.7in
This year so far
Normal to Date
22.9in
30-yr average
Typical Range
16.9–30.6in
10th–90th pct YTD
Departure
+26%
vs 30-yr normal
By Month
This year
Typical range
Normal
Jan: 1.95" · normal 2.74" (1.2–4.4)
Feb: 0.94" · normal 2.46" (1.0–3.8)
Mar: 4.40" · normal 3.65" (2.1–5.3)
Apr: 7.33" · normal 4.68" (2.7–6.6)
May: 5.12" · normal 4.95" (2.5–7.6)
Jun: 8.94" · normal 4.12" (2.0–6.3)
Jul: 0.07" (so far)· normal 3.52" (1.1–6.7)
Aug: normal 3.11" (1.7–6.3)
Sep: normal 3.46" (1.6–6.2)
Oct: normal 3.41" (1.6–5.7)
Nov: normal 3.64" (1.6–6.0)
Dec: normal 2.53" (1.4–3.7)
Baseline 1991–2020 · Source: Open-Meteo08:17 PM
Your History · Mississippi River Pool Lock and Dam 26 at Alton,IL
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Weather Conditions
WEATHER CONDITIONS
TODAY
97°
75°
FRI
96°
76°
SAT
95°
75°
SUN
85°
71°
MON
82°
65°
TUE
83°
65°
WED
87°
66°
FISH INDEX
Temperature
Too Hot
Wind
Light
Pressure
Stable
Moon Phase
Average
DAYLIGHT
SUNRISE
05:39 AM
SUNSET
08:29 PM
14H 50M OF DAYLIGHT0H 0M REMAINING
MOON PHASE
Waning Gibbous
91% illuminated
Station Location
38.8873, -90.1840Loading map…
DATA · USGS · NOAA · NWSUPDATED 2026-07-02 21:42 UTC
Site #05587498·USGS
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