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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 05558300 ILLINOIS RIVER AT HENRY, IL


Marshall County, Illinois
Hydrologic Unit Code 07130001
Latitude  41°06'26", Longitude  89°21'22" NAD83
Drainage area 13,544  square miles
Gage datum 425.88 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 1981-10-01 -> 2021-09-30)

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 16,300 13,800 22,800 21,700 24,100 22,100 17,000 10,600 9,820 9,320 11,900 14,700
2 16,000 13,700 22,600 22,000 25,700 22,200 16,600 9,980 9,620 8,730 12,200 15,400
3 15,500 14,200 22,200 22,000 25,300 21,600 16,100 9,900 9,890 8,830 12,100 15,500
4 14,900 14,600 21,900 22,000 23,800 20,600 16,300 9,940 9,730 9,750 11,600 15,700
5 15,500 14,600 22,600 21,600 22,100 19,800 15,500 10,400 9,280 9,590 11,500 15,600
6 16,100 14,700 22,000 21,300 20,600 19,300 14,800 10,200 8,880 9,520 11,500 16,000
7 15,800 15,100 21,100 21,400 20,500 18,700 14,500 9,590 8,590 9,490 11,400 15,600
8 15,000 15,100 21,300 21,200 20,400 18,300 14,100 9,110 9,250 9,190 11,100 15,500
9 15,000 15,300 22,000 20,800 21,500 18,300 13,500 9,130 9,380 9,160 11,000 15,100
10 15,700 15,300 23,000 20,900 22,300 19,100 13,200 9,040 9,490 8,860 11,000 15,000
11 15,700 15,300 25,000 21,300 22,500 19,600 13,600 8,830 10,200 8,560 11,100 14,600
12 15,700 15,700 25,400 21,100 23,000 19,600 13,700 8,420 9,830 8,440 11,100 14,500
13 15,600 15,300 25,000 21,900 23,500 19,100 13,800 8,450 10,200 8,530 11,400 15,100
14 16,200 15,100 24,700 21,500 24,000 19,600 14,000 8,370 11,100 8,880 11,400 14,600
15 16,500 15,300 25,400 21,800 24,300 20,000 13,700 8,400 11,900 9,230 11,000 14,700
16 16,200 15,600 25,000 22,900 23,900 20,000 12,900 8,230 12,300 9,610 11,000 14,800
17 15,600 15,600 24,300 23,300 23,300 20,000 12,300 8,500 11,800 9,520 10,700 14,100
18 15,000 16,200 23,800 23,300 22,800 19,600 12,400 8,670 10,700 10,100 10,900 13,600
19 14,700 16,800 23,800 25,000 22,900 19,300 13,500 8,740 10,400 10,600 11,800 13,100
20 14,100 17,600 25,000 24,700 22,500 18,900 15,000 8,940 10,300 10,400 12,600 12,600
21 14,000 19,200 25,200 23,800 21,300 19,500 14,700 9,000 9,900 9,830 13,700 12,600
22 14,200 21,200 24,200 23,000 20,400 19,400 14,300 9,540 9,520 9,860 13,000 12,700
23 14,300 22,100 24,000 22,700 20,400 19,800 14,700 9,620 9,470 9,990 12,800 13,400
24 15,000 22,500 23,800 22,300 20,100 19,900 14,400 10,100 9,180 10,400 12,600 14,000
25 15,200 22,600 23,800 21,500 20,000 19,500 14,200 10,700 8,730 10,600 12,800 14,100
26 15,100 22,800 22,500 20,900 20,100 19,000 13,700 10,800 8,530 10,800 12,400 14,300
27 14,400 23,000 21,800 21,300 20,600 18,700 13,100 10,900 8,550 10,800 12,900 14,800
28 13,700 23,100 21,400 21,200 21,000 18,900 12,400 11,200 9,050 11,000 14,000 15,500
29 13,200 13,900 21,100 21,100 21,700 18,700 11,700 11,100 9,480 11,000 14,600 16,400
30 13,300   21,500 22,000 22,100 17,200 11,300 10,500 9,300 10,900 14,900 16,900
31 13,400   21,300   22,300   10,900 10,300   11,300   16,800