MEDIAN FLOW RATE · 1 YEAR
1,048cfs 51.0% vs avg
Optimal band: 29–39 cfs
PERIOD HIGH
8,618cfs
PERIOD LOW
4cfs
RUNNABLE
4%
last 1 year in band
Precipitation History
Precipitation · YTD
NormalNear-normal year
2026 to date
20.2in
≈ normal
20.19 in of precipitation so far this year — about average for this point in the season (normal 20.82 in).
YTD Total
20.2in
This year so far
Normal to Date
20.8in
30-yr average
Typical Range
13.8–27.3in
10th–90th pct YTD
Departure
-3%
vs 30-yr normal
By Month
This year
Typical range
Normal
Jan: 1.58" · normal 2.23" (1.0–3.7)
Feb: 0.12" · normal 2.10" (0.7–3.2)
Mar: 3.99" · normal 3.05" (1.6–4.9)
Apr: 5.38" · normal 4.27" (2.6–6.8)
May: 1.49" · normal 4.78" (2.6–7.4)
Jun: 7.61" · normal 4.26" (2.4–7.1)
Jul: 0.04" (so far)· normal 3.67" (1.9–5.5)
Aug: normal 3.07" (1.4–4.7)
Sep: normal 3.05" (1.1–5.4)
Oct: normal 3.25" (1.5–6.1)
Nov: normal 2.97" (1.2–5.4)
Dec: normal 2.31" (1.4–4.1)
Baseline 1991–2020 · Source: Open-Meteo01:14 AM
Your History · MACKINAW RIVER NEAR CONGERVILLE, IL
Track your history
Sign in to track your sessions at MACKINAW RIVER NEAR CONGERVILLE, IL — best days, monthly trends, and time on the water.
Sign inSPONSORED
Weather Conditions
WEATHER CONDITIONS
TODAY
90°
75°
THU
93°
74°
FRI
90°
73°
SAT
89°
70°
SUN
82°
69°
MON
78°
65°
TUE
77°
64°
FISH INDEX
Temperature
Too Hot
Wind
Light
Pressure
Rising — Slow
Moon Phase
Average
DAYLIGHT
SUNRISE
05:30 AM
SUNSET
08:31 PM
15H 1M OF DAYLIGHT18H 23M REMAINING
MOON PHASE
Waning Gibbous
95% illuminated
Station Location
40.6235, -89.2417Loading map…
DATA · USGS · NOAA · NWSUPDATED 2026-07-02 02:08 UTC
Site #05567500·USGS
Create a free account to save favorites, set flow alerts, and track conditions