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USGS Surface-Water Daily Statistics for Iowa

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Boating safety tips are available from the U.S. Coast Guard.

NOTE: Station Numbers for Iowa precipitation gages have changed (see list).


The statistics generated from this site are based on approved daily-mean data and may not match those published by the USGS in official publications. The user is responsible for assessment and use of statistics from this site. For more details on why the statistics may not match, click here.

USGS 06601200 Missouri River at Decatur, NE


Monona County, Iowa
Hydrologic Unit Code 10230001
Latitude  42°00'28.2", Longitude  96°14'34.5" NAD83
Drainage area 316,200  square miles
Gage datum 1,010.56 feet above NAVD88
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00060, Discharge, cubic feet per second,
Day of
month		 Mean of daily mean values for each day for water year of record in, ft3/s   (Calculation Period 1987-10-01 -> 2024-09-30)

Calculation period restricted by USGS staff due to special conditions at/near site
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1 19,400 19,200 20,500 35,000 36,300 40,400 42,300 40,500 38,900 39,200 34,700 27,400
2 19,100 19,200 20,600 35,100 36,400 40,400 42,200 40,400 39,100 39,200 34,500 27,200
3 19,200 19,100 20,400 34,900 36,400 40,200 42,000 40,200 39,400 39,100 34,400 26,800
4 19,500 19,100 20,600 34,500 36,500 40,200 41,800 40,200 39,600 38,900 34,400 26,300
5 19,500 19,100 20,600 34,300 36,500 39,900 42,100 40,500 39,600 38,900 34,400 25,600
6 19,200 19,300 20,800 34,300 36,200 39,900 42,200 40,500 39,500 38,800 34,400 24,800
7 19,300 19,400 20,700 34,500 35,800 40,300 41,900 40,300 39,500 38,600 34,400 24,200
8 19,100 19,300 20,700 34,800 35,800 40,100 42,200 40,400 39,600 38,700 34,200 23,600
9 19,400 19,300 20,900 34,900 36,300 40,400 42,500 40,200 39,500 38,500 34,100 23,000
10 19,500 19,500 21,400 35,100 36,700 40,900 42,500 40,300 39,500 38,300 34,000 22,400
11 19,600 19,600 21,700 35,200 36,700 41,400 42,400 40,200 39,700 38,100 33,900 21,600
12 19,700 19,500 21,800 35,500 37,100 41,400 42,200 40,000 39,900 37,900 33,800 21,100
13 19,400 19,600 23,000 35,500 37,800 41,400 42,000 40,000 39,900 37,900 33,700 20,800
14 19,200 20,000 24,800 35,600 38,200 40,800 42,000 40,000 40,100 37,800 33,500 20,800
15 19,300 20,200 25,900 35,800 37,900 41,500 42,000 39,900 40,300 37,700 33,400 20,400
16 19,400 19,900 26,700 35,900 38,100 42,000 41,900 40,000 40,700 37,500 33,500 19,800
17 19,500 19,900 27,300 35,700 37,900 42,400 42,200 40,100 40,900 37,300 33,500 19,700
18 19,500 20,300 27,700 35,300 37,400 42,600 42,200 40,100 40,800 37,200 33,500 19,800
19 19,300 20,700 28,000 35,300 37,400 42,500 41,200 40,000 40,900 37,000 33,300 19,800
20 19,200 20,800 28,500 35,500 37,400 42,400 40,900 39,900 40,700 36,800 33,200 19,600
21 19,300 20,900 29,300 35,500 37,100 42,600 40,800 39,700 40,600 36,700 33,200 19,600
22 19,400 20,700 30,300 35,300 37,400 42,400 40,900 39,800 40,700 36,600 33,000 19,700
23 19,400 20,400 30,800 35,300 37,700 42,000 41,000 40,000 40,700 36,600 32,700 19,700
24 19,400 20,200 31,100 35,400 37,800 41,600 40,700 39,700 40,600 36,600 32,300 19,600
25 19,400 20,200 31,300 35,900 37,600 41,800 40,600 39,200 40,500 36,400 31,400 19,400
26 19,400 20,000 31,900 36,200 38,000 42,700 40,800 39,200 40,400 36,300 30,400 19,500
27 19,400 20,000 32,900 36,400 38,000 42,700 40,600 39,300 40,100 36,100 29,600 19,700
28 19,400 20,200 33,600 36,400 38,700 42,700 40,600 39,200 39,900 35,700 28,800 19,700
29 19,400 23,700 34,200 36,300 39,200 42,700 40,600 39,100 39,800 35,400 28,000 19,700
30 19,200   34,700 36,200 39,300 42,500 40,500 39,200 39,600 35,100 27,700 19,600
31 19,100   34,600   39,800   40,600 38,900   34,900   19,500