MEDIAN FLOW RATE · 1 YEAR
1cfs 12.9% vs avg
Optimal band: 2–2 cfs
PERIOD HIGH
186cfs
PERIOD LOW
1cfs
RUNNABLE
11%
last 1 year in band
Precipitation History
Precipitation · YTD
WetWetter than normal
2026 to date
23.1in
+19% vs normal
23.05 in of precipitation so far this year, 19% above the 30-year normal of 19.35 in for this point in the season.
YTD Total
23.1in
This year so far
Normal to Date
19.4in
30-yr average
Typical Range
13.3–24.6in
10th–90th pct YTD
Departure
+19%
vs 30-yr normal
By Month
This year
Typical range
Normal
Jan: 2.50" · normal 2.08" (1.1–3.2)
Feb: 0.66" · normal 1.97" (0.8–3.6)
Mar: 4.04" · normal 2.54" (1.5–4.3)
Apr: 7.52" · normal 4.15" (2.4–6.1)
May: 1.31" · normal 4.40" (1.8–7.2)
Jun: 6.69" · normal 4.05" (1.8–6.6)
Jul: 0.34" (so far)· normal 3.67" (2.0–4.9)
Aug: normal 3.70" (1.9–5.7)
Sep: normal 2.98" (1.3–5.4)
Oct: normal 3.21" (1.4–6.1)
Nov: normal 2.42" (1.2–4.2)
Dec: normal 2.13" (0.9–3.8)
Baseline 1991–2020 · Source: Open-Meteo07:21 AM
Your History · MC DONALD CREEK NEAR MOUNT PROSPECT, IL
Track your history
Sign in to track your sessions at MC DONALD CREEK NEAR MOUNT PROSPECT, IL — best days, monthly trends, and time on the water.
Sign inSPONSORED
Weather Conditions
WEATHER CONDITIONS
TODAY
96°
74°
FRI
87°
71°
SAT
95°
73°
SUN
83°
69°
MON
76°
67°
TUE
82°
64°
WED
83°
68°
FISH INDEX
Temperature
Warm
Wind
Calm
Pressure
Rising — Slow
Moon Phase
Average
DAYLIGHT
SUNRISE
05:20 AM
SUNSET
08:31 PM
15H 11M OF DAYLIGHT10H 45M REMAINING
MOON PHASE
Waning Gibbous
94% illuminated
Station Location
42.0953, -87.9128Loading map…
DATA · USGS · NOAA · NWSUPDATED 2026-07-02 09:46 UTC
Site #05529500·USGS
Create a free account to save favorites, set flow alerts, and track conditions