MEDIAN FLOW RATE · 30 DAY
306cfs 288.8% vs avg
Optimal band: 424–574 cfs
PERIOD HIGH
2,732cfs
PERIOD LOW
107cfs
RUNNABLE
13%
last 30 day in band
Precipitation History
Precipitation · YTD
NormalNear-normal year
2026 to date
23.6in
≈ normal
23.56 in of precipitation so far this year — about average for this point in the season (normal 21.83 in).
YTD Total
23.6in
This year so far
Normal to Date
21.8in
30-yr average
Typical Range
16.3–26.9in
10th–90th pct YTD
Departure
+8%
vs 30-yr normal
By Month
This year
Typical range
Normal
Jan: 1.58" · normal 2.51" (1.1–4.1)
Feb: 0.62" · normal 2.16" (0.8–3.5)
Mar: 3.75" · normal 2.97" (1.6–5.3)
Apr: 5.97" · normal 4.22" (2.5–6.5)
May: 1.02" · normal 4.62" (2.4–6.8)
Jun: 9.11" · normal 4.20" (2.1–6.8)
Jul: 1.51" (so far)· normal 4.12" (2.4–6.6)
Aug: normal 3.84" (2.3–5.1)
Sep: normal 3.28" (1.1–5.8)
Oct: normal 3.37" (1.7–6.2)
Nov: normal 2.83" (1.8–4.6)
Dec: normal 2.27" (1.2–3.6)
Baseline 1991–2020 · Source: Open-Meteo08:55 AM
Your History · THORN CREEK AT THORNTON, IL
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Weather Conditions
WEATHER CONDITIONS
TODAY
90°
65°
THU
88°
71°
FRI
89°
68°
SAT
88°
67°
SUN
92°
69°
MON
90°
71°
TUE
91°
70°
FISH INDEX
Temperature
Ideal
Wind
Calm
Pressure
Stable
Moon Phase
Good
DAYLIGHT
SUNRISE
05:24 AM
SUNSET
08:26 PM
15H 2M OF DAYLIGHT
MOON PHASE
Last Quarter
39% illuminated
Station Location
41.5682, -87.6083Loading map…
DATA · USGS · NOAA · NWSUPDATED 2026-07-08 00:00 UTC
Site #05536275·USGS
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