MEDIAN FLOW RATE · 1 DAY
—cfs
No flow data available
Precipitation History
Precipitation · YTD
NormalNear-normal year
2026 to date
19.0in
≈ normal
19.02 in of precipitation so far this year — about average for this point in the season (normal 21.57 in).
YTD Total
19.0in
This year so far
Normal to Date
21.6in
30-yr average
Typical Range
15.2–28.1in
10th–90th pct YTD
Departure
-12%
vs 30-yr normal
By Month
This year
Typical range
Normal
Jan: 1.54" · normal 2.11" (1.0–3.6)
Feb: 0.17" · normal 2.08" (0.7–3.4)
Mar: 4.40" · normal 2.93" (1.5–4.4)
Apr: 4.15" · normal 4.46" (3.0–6.8)
May: 1.60" · normal 4.72" (2.0–7.6)
Jun: 5.67" · normal 4.42" (2.0–8.3)
Jul: 1.48" (so far)· normal 3.43" (1.3–5.2)
Aug: normal 3.09" (1.4–4.5)
Sep: normal 3.10" (1.6–6.3)
Oct: normal 2.87" (1.3–4.8)
Nov: normal 2.88" (1.2–5.3)
Dec: normal 2.20" (1.1–4.1)
Baseline 1991–2020 · Source: Open-Meteo03:55 PM
Your History · SPOON RIVER AT DUNCAN MILLS, IL
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Station Location
40.3406, -90.1893Loading map…
DATA · USGS · NOAA · NWS
Site #05570400·USGS
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