MEDIAN FLOW RATE · 30 DAY
4,913cfs 10.4% vs avg
Optimal band: 5,195–7,029 cfs
PERIOD HIGH
8,738cfs
PERIOD LOW
4,074cfs
RUNNABLE
29%
last 30 day in band
Precipitation History
Precipitation · YTD
WetWetter than normal
2026 to date
22.5in
+19% vs normal
22.53 in of precipitation so far this year, 19% above the 30-year normal of 18.88 in for this point in the season.
YTD Total
22.5in
This year so far
Normal to Date
18.9in
30-yr average
Typical Range
13.2–24.1in
10th–90th pct YTD
Departure
+19%
vs 30-yr normal
By Month
This year
Typical range
Normal
Jan: 1.54" · normal 1.81" (1.0–2.8)
Feb: 0.47" · normal 1.79" (0.7–3.4)
Mar: 3.81" · normal 2.45" (1.2–4.2)
Apr: 7.75" · normal 4.10" (2.5–6.0)
May: 1.15" · normal 4.09" (1.7–6.9)
Jun: 6.53" · normal 4.04" (1.8–6.7)
Jul: 1.29" (so far)· normal 3.58" (2.1–5.8)
Aug: normal 3.47" (1.3–5.7)
Sep: normal 3.31" (1.3–6.2)
Oct: normal 2.89" (1.2–5.4)
Nov: normal 2.32" (0.8–3.9)
Dec: normal 2.10" (0.9–4.1)
Baseline 1991–2020 · Source: Open-Meteo01:09 AM
Your History · ROCK RIVER AT ROCKTON, IL
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Weather Conditions
WEATHER CONDITIONS
TODAY
80°
64°
MON
83°
63°
TUE
87°
61°
WED
84°
65°
THU
83°
69°
FRI
81°
67°
SAT
82°
64°
FISH INDEX
Temperature
Warm
Wind
Calm
Pressure
Stable
Moon Phase
Good
DAYLIGHT
SUNRISE
05:25 AM
SUNSET
08:36 PM
15H 11M OF DAYLIGHT
MOON PHASE
Last Quarter
64% illuminated
Station Location
42.4503, -89.0725Loading map…
DATA · USGS · NOAA · NWSUPDATED 2026-07-06 00:00 UTC
Site #05437500·USGS
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