MEDIAN FLOW RATE · 1 YEAR
—cfs
No flow data available
Precipitation History
Precipitation · YTD
NormalNear-normal year
2026 to date
23.3in
≈ normal
23.25 in of precipitation so far this year — about average for this point in the season (normal 22.04 in).
YTD Total
23.3in
This year so far
Normal to Date
22.0in
30-yr average
Typical Range
17.5–28.6in
10th–90th pct YTD
Departure
+6%
vs 30-yr normal
By Month
This year
Typical range
Normal
Jan: 1.46" · normal 2.50" (1.1–4.0)
Feb: 0.62" · normal 2.22" (0.8–4.1)
Mar: 5.28" · normal 3.11" (1.8–4.5)
Apr: 5.32" · normal 4.46" (2.9–7.2)
May: 3.38" · normal 4.54" (2.1–7.1)
Jun: 6.19" · normal 4.23" (2.2–7.4)
Jul: 1.00" (so far)· normal 3.56" (1.3–5.6)
Aug: normal 3.03" (1.6–4.5)
Sep: normal 3.17" (1.1–6.1)
Oct: normal 3.28" (1.6–5.5)
Nov: normal 3.36" (1.4–5.6)
Dec: normal 2.37" (1.3–3.7)
Baseline 1991–2020 · Source: Open-Meteo12:07 PM
Your History · SOUTH FORK SANGAMON RIVER BELOW ROCHESTER, IL
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Station Location
39.7538, -89.5657Loading map…
DATA · USGS · NOAA · NWS
Site #05576022·USGS
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