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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 05443500 ROCK RIVER AT COMO, IL


Whiteside County, Illinois
Hydrologic Unit Code 07090005
Latitude  41°46'20", Longitude  89°44'44" NAD83
Drainage area 8,753  square miles
Gage datum 603.03 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 1934-10-01 -> 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 5,350 4,830 8,600 10,900 9,000 7,250 7,270 4,750 4,210 4,430 4,860 5,250
2 5,320 4,700 8,650 11,000 8,910 7,270 7,350 4,650 4,160 4,360 5,080 5,270
3 5,150 4,690 8,780 10,900 8,790 7,390 7,520 4,540 4,150 4,360 5,240 5,410
4 5,070 4,760 8,980 10,800 8,590 7,450 7,430 4,450 4,160 4,380 5,290 5,410
5 5,150 4,810 9,190 10,700 8,400 7,550 7,050 4,450 4,060 4,390 5,190 5,320
6 5,410 5,120 9,340 10,600 8,180 7,280 6,760 4,630 3,920 4,420 5,170 5,190
7 5,390 5,150 9,300 10,500 8,100 6,950 6,530 4,660 3,840 4,510 5,170 5,130
8 5,330 5,230 9,010 10,300 7,980 6,980 6,520 4,730 3,950 4,510 5,090 5,040
9 5,350 5,440 9,000 10,200 7,970 7,180 6,660 4,640 4,120 4,470 5,020 4,980
10 5,300 5,580 9,230 10,100 7,950 7,130 6,390 4,500 4,220 4,560 5,080 4,900
11 5,220 5,720 9,860 10,000 8,050 7,160 6,140 4,380 4,260 4,790 5,160 4,820
12 5,170 5,730 10,400 10,100 8,090 7,130 5,930 4,340 4,280 4,720 5,160 4,740
13 5,230 5,860 10,800 9,950 8,260 7,540 5,850 4,290 4,410 4,550 5,150 4,750
14 5,150 6,000 10,900 9,850 8,350 7,900 5,830 4,260 4,680 4,480 5,190 4,800
15 5,150 6,130 11,000 9,780 8,370 7,950 5,670 4,370 4,760 4,430 5,110 4,770
16 5,040 6,100 11,300 9,720 8,220 7,870 5,450 4,340 4,700 4,410 4,980 4,840
17 4,990 5,990 11,200 9,790 8,140 7,680 5,320 4,350 4,570 4,310 5,120 4,860
18 5,020 5,880 10,800 9,820 8,000 7,530 5,460 4,420 4,560 4,430 5,070 4,890
19 4,860 6,410 10,800 9,740 7,980 7,550 5,810 4,310 4,640 4,460 5,090 4,790
20 4,800 7,380 11,300 9,640 7,910 7,620 6,130 4,410 4,590 4,500 5,120 4,690
21 4,660 8,360 11,400 9,660 7,840 7,660 5,880 4,480 4,700 4,490 5,120 4,680
22 4,700 8,590 11,300 9,610 7,680 7,690 5,860 4,420 4,790 4,460 5,110 4,700
23 4,950 8,350 11,100 9,480 7,660 7,630 5,840 4,380 4,770 4,550 5,050 4,680
24 5,380 8,370 11,200 9,380 7,580 7,500 5,720 4,330 4,820 4,660 5,020 4,680
25 5,700 8,740 11,100 9,280 7,460 7,490 5,690 4,270 4,760 4,770 4,930 4,750
26 5,680 8,790 10,800 9,210 7,460 7,410 5,520 4,310 4,780 4,810 4,930 4,800
27 5,320 8,930 10,700 9,270 7,230 7,400 5,310 4,510 4,860 4,810 5,060 4,930
28 5,050 9,020 10,700 9,200 7,260 7,300 5,200 4,640 4,800 4,830 5,130 5,290
29 4,900 8,540 10,600 9,070 7,520 7,410 5,110 4,600 4,770 4,790 5,170 5,450
30 5,020   10,800 9,010 7,480 7,350 4,980 4,460 4,730 4,750 5,190 5,500
31 5,160   10,800   7,270   4,910 4,330   4,860   5,470