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USGS Daily Statistics for the Nation

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 05586100 ILLINOIS RIVER AT VALLEY CITY, IL


Scott County, Illinois
Hydrologic Unit Code 07130011
Latitude  39°42'12", Longitude  90°38'43" NAD27
Drainage area 26,743  square miles
Gage datum 418.00 feet above NGVD29
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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 1938-10-01 -> 2020-09-30)

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 20,700 22,500 31,200 36,700 39,100 35,000 30,800 17,700 12,100 13,300 13,400 17,500
2 21,300 22,400 31,300 36,800 38,900 35,100 30,500 17,000 12,000 13,200 13,800 17,800
3 21,600 22,400 31,600 36,700 39,000 34,900 30,000 16,400 12,200 13,300 14,300 18,000
4 22,100 22,400 31,900 36,700 38,900 34,500 29,200 16,000 12,300 13,400 14,600 18,200
5 22,500 22,700 32,100 36,800 39,300 34,200 28,500 15,700 12,200 13,700 14,800 18,200
6 22,600 23,000 32,300 36,800 39,300 33,900 27,800 15,800 11,900 13,700 14,900 18,500
7 22,500 23,200 32,500 36,900 39,000 33,300 27,200 16,000 11,700 13,700 15,000 18,800
8 22,500 23,300 32,500 36,800 38,700 33,000 26,600 15,800 11,600 13,700 15,000 19,000
9 22,400 23,500 32,400 36,600 38,400 32,500 26,100 15,400 11,500 13,600 14,800 19,100
10 22,500 23,900 32,800 36,400 38,400 32,100 25,700 15,100 11,600 13,600 14,700 18,900
11 22,700 24,100 33,200 36,500 38,300 32,000 25,200 14,900 11,500 13,500 14,900 19,000
12 22,500 24,200 33,600 36,600 38,200 31,800 24,500 14,400 11,300 13,600 15,000 19,000
13 22,300 24,500 34,100 36,500 38,000 31,900 23,700 14,200 11,300 13,500 14,900 19,000
14 22,400 24,600 34,500 36,600 37,800 31,800 23,100 13,700 11,700 13,400 15,000 18,800
15 22,600 24,700 35,100 36,700 37,800 31,700 22,700 13,300 11,800 13,400 14,800 19,000
16 22,700 25,000 35,700 36,700 38,000 31,900 22,200 13,100 12,100 13,400 14,600 19,000
17 22,700 25,300 36,100 36,800 38,300 32,200 21,500 12,800 12,500 13,400 14,600 19,300
18 22,600 25,600 36,400 37,100 38,600 32,100 20,900 12,700 12,600 13,300 14,600 19,300
19 22,600 25,900 36,500 37,500 39,100 32,100 20,300 12,500 12,600 13,100 14,800 19,100
20 22,300 26,500 36,600 37,800 39,100 32,200 20,000 12,500 12,800 13,100 15,100 18,900
21 21,800 27,300 36,800 38,100 39,100 32,300 20,000 12,500 13,100 13,000 15,600 18,700
22 21,900 28,200 36,800 38,500 38,800 32,400 20,200 12,300 13,100 12,700 16,000 18,500
23 22,100 28,900 36,800 38,900 38,300 32,200 19,900 12,400 13,300 12,900 16,000 18,300
24 22,400 29,600 36,900 39,000 37,900 32,100 20,100 12,300 13,100 12,900 16,000 18,300
25 22,500 30,100 36,800 39,100 37,500 32,100 20,200 12,100 13,200 13,000 16,000 18,500
26 22,800 30,700 36,900 39,000 37,000 32,000 20,100 12,200 13,300 13,100 16,000 18,600
27 22,800 31,000 37,000 39,000 36,500 31,900 19,900 12,000 13,100 13,200 16,200 18,800
28 22,600 31,000 37,000 39,100 36,200 31,500 19,600 11,800 13,000 13,100 16,600 19,000
29 22,300 25,200 36,800 39,100 35,900 31,100 19,300 12,000 13,000 13,200 16,800 19,300
30 22,500   36,800 39,100 35,600 31,100 18,700 12,100 13,200 13,100 17,000 19,900
31 22,600   36,700   35,300   18,200 12,000   13,100   20,200