MEDIAN FLOW RATE · 7 DAY
—cfs
No flow data available
Precipitation History
Precipitation · YTD
NormalNear-normal year
2026 to date
19.1in
≈ normal
19.15 in of precipitation so far this year — about average for this point in the season (normal 21.17 in).
YTD Total
19.1in
This year so far
Normal to Date
21.2in
30-yr average
Typical Range
15.6–26.9in
10th–90th pct YTD
Departure
-9%
vs 30-yr normal
By Month
This year
Typical range
Normal
Jan: 1.30" · normal 2.38" (1.0–4.2)
Feb: 0.25" · normal 2.05" (0.7–3.1)
Mar: 4.88" · normal 2.96" (1.4–4.7)
Apr: 3.38" · normal 4.23" (2.5–7.0)
May: 1.38" · normal 4.62" (2.7–7.1)
Jun: 6.22" · normal 4.08" (2.1–7.0)
Jul: 1.75" (so far)· normal 3.91" (2.0–5.8)
Aug: normal 3.26" (1.5–5.8)
Sep: normal 2.90" (0.7–4.0)
Oct: normal 3.21" (1.5–6.0)
Nov: normal 2.89" (1.4–5.2)
Dec: normal 2.23" (1.4–4.0)
Baseline 1991–2020 · Source: Open-Meteo01:21 PM
Your History · SOUTH FORK VERMILION RIVER AT FORREST, IL
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Station Location
40.7486, -88.4162Loading map…
DATA · USGS · NOAA · NWS
Site #05554200·USGS
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