MEDIAN FLOW RATE · 30 DAY
—cfs
No flow data available
Precipitation History
Precipitation · YTD
WetWetter than normal
2026 to date
24.9in
+19% vs normal
24.89 in of precipitation so far this year, 19% above the 30-year normal of 20.9 in for this point in the season.
YTD Total
24.9in
This year so far
Normal to Date
20.9in
30-yr average
Typical Range
15.2–27.6in
10th–90th pct YTD
Departure
+19%
vs 30-yr normal
By Month
This year
Typical range
Normal
Jan: 1.17" · normal 1.50" (0.9–2.4)
Feb: 0.44" · normal 1.77" (0.7–3.3)
Mar: 2.23" · normal 2.69" (1.3–4.8)
Apr: 9.84" · normal 4.32" (2.7–5.9)
May: 2.15" · normal 4.80" (2.5–8.1)
Jun: 8.41" · normal 4.93" (2.0–8.9)
Jul: 0.65" (so far)· normal 3.68" (1.8–6.5)
Aug: normal 3.75" (1.3–7.0)
Sep: normal 3.79" (1.6–6.3)
Oct: normal 2.89" (1.1–4.8)
Nov: normal 2.31" (1.0–3.7)
Dec: normal 1.94" (1.0–3.3)
Baseline 1991–2020 · Source: Open-Meteo11:00 AM
Your History · South Branch Ralston Creek at Iowa City, IA
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Station Location
41.6514, -91.5077Loading map…
DATA · USGS · NOAA · NWS
Site #05455010·USGS
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