USGS · 05536118

NB CHICAGO RIVER

USGS · 05536118LIVE

NB CHICAGO RIVER AT GRAND AVENUE AT CHICAGO, IL

CHICAGO, IL41.8923°N, -87.6424°W

AIR TEMP

72°F

WIND

6mph SSE

FISH INDEX

63SCORE / 100

GOOD · 3 OF 5

1D 7D 30D 1YR

Flow Rate Historical Avg

MEDIAN FLOW RATE · 7 DAY

—cfs

No flow data available

Precipitation History

Precipitation · YTD

Normal

Near-normal year

2026 to date

22.0in

≈ normal

21.97 in of precipitation so far this year — about average for this point in the season (normal 19.36 in).

YTD Total

22.0in

This year so far

Normal to Date

19.4in

30-yr average

Typical Range

13.4–25.0in

10th–90th pct YTD

Departure

+14%

vs 30-yr normal

By Month

This year

Typical range

Normal

Jan: 2.00" · normal 2.28" (1.2–3.8)

Jan

Feb: 0.66" · normal 2.09" (0.8–3.7)

Feb

Mar: 3.73" · normal 2.62" (1.5–4.3)

Mar

Apr: 6.45" · normal 4.08" (2.4–6.3)

Apr

May: 1.32" · normal 4.24" (1.7–6.3)

May

Jun: 7.15" · normal 3.80" (1.5–6.1)

Jun

Jul: 0.66" (so far)· normal 3.63" (2.0–5.3)

Jul

Aug: normal 3.75" (1.8–5.5)

Aug

Sep: normal 3.05" (1.2–5.5)

Sep

Oct: normal 3.38" (1.6–6.5)

Oct

Nov: normal 2.66" (1.4–4.3)

Nov

Dec: normal 2.30" (1.1–3.9)

Dec

Baseline 1991–2020 · Source: Open-Meteo07:14 AM

Your History · NB CHICAGO RIVER AT GRAND AVENUE AT CHICAGO, IL

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Station Location

41.8923, -87.6424

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DATA · USGS · NOAA · NWSUPDATED 2026-07-03 08:30 UTC

Site #05536118·USGS

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