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USGS Daily Statistics for Illinois

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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 05442300 ROCK RIVER AT DIXON, IL


Lee County, Illinois
Hydrologic Unit Code 07090005
Latitude  41°50'39", Longitude  89°29'09" NAD83
Drainage area 8,615  square miles
Gage datum 628.51 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 2009-10-01 -> 2025-09-30)

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 7,460 7,140 9,170 12,100 11,900 10,100 11,600 8,280 5,590 6,180 6,930 7,220
2 7,430 6,960 9,180 11,900 12,100 9,730 11,100 7,940 5,720 6,370 6,810 7,380
3 7,330 6,910 9,030 12,200 11,900 9,320 10,600 7,540 6,210 6,970 6,630 7,660
4 7,230 6,830 8,770 12,400 11,700 8,850 10,100 7,330 6,510 7,190 6,730 7,640
5 6,860 6,760 8,740 12,500 11,400 8,850 9,740 7,200 6,390 7,350 6,790 7,450
6 6,560 6,590 8,910 12,600 11,100 8,870 9,540 6,880 6,320 7,600 6,890 7,170
7 6,470 6,460 9,020 12,400 10,800 8,650 9,400 6,710 6,170 7,910 6,870 6,960
8 6,550 6,310 8,970 12,100 10,600 8,400 9,220 6,960 6,050 8,000 6,820 6,670
9 6,670 6,330 9,080 11,800 10,500 8,390 8,910 7,030 6,000 7,770 6,910 6,480
10 6,670 6,510 10,200 11,700 10,500 8,800 8,750 6,880 6,050 7,370 7,320 6,330
11 6,720 6,560 12,000 11,700 10,500 8,800 8,550 6,650 6,100 7,400 7,270 6,260
12 6,840 6,530 12,600 11,700 10,500 8,680 8,310 6,620 6,620 7,350 7,160 6,310
13 6,780 6,460 13,100 11,500 10,800 8,560 8,180 6,390 7,370 7,300 7,000 6,090
14 6,530 6,310 13,200 11,300 11,100 8,490 8,410 6,420 7,670 7,330 6,730 6,450
15 6,180 6,250 13,100 11,300 11,400 8,660 8,770 6,370 7,550 7,480 6,600 7,010
16 6,220 6,230 13,000 11,600 11,400 9,240 8,900 6,240 7,150 7,660 6,490 7,480
17 6,660 6,440 12,800 12,000 11,200 9,100 8,950 6,020 6,630 7,520 6,480 7,450
18 6,750 6,640 12,500 12,500 10,900 8,860 8,670 6,000 6,420 7,310 6,470 7,190
19 6,380 6,860 12,200 12,700 10,800 9,460 8,260 5,910 6,290 7,110 6,610 6,880
20 6,300 7,830 12,200 12,700 10,400 9,850 8,270 5,870 6,310 6,960 6,640 6,850
21 6,120 9,150 12,300 12,500 10,100 9,920 8,460 5,930 6,250 6,790 6,610 6,750
22 6,100 9,450 12,100 12,000 9,950 10,300 9,200 5,910 6,350 6,620 6,760 6,680
23 6,340 9,020 11,800 11,700 10,100 10,600 9,490 5,730 6,670 6,570 6,710 6,460
24 6,720 9,480 11,600 11,500 9,960 10,700 10,200 5,670 6,630 6,610 6,550 6,700
25 6,880 9,640 11,700 11,200 10,100 10,500 10,900 5,570 6,420 6,700 6,510 6,640
26 6,700 9,130 11,700 10,900 9,920 10,500 10,100 5,500 6,270 6,820 6,580 6,610
27 6,640 8,930 11,900 10,700 10,000 11,000 9,440 5,570 6,390 7,110 6,900 6,650
28 6,690 8,930 12,000 10,600 9,970 11,200 9,350 5,430 6,310 7,360 7,120 6,910
29 6,790 6,980 12,100 10,700 10,100 11,200 9,310 5,560 6,160 7,340 7,310 7,130
30 7,050   12,000 11,300 10,500 11,400 9,130 5,670 6,180 7,170 7,380 7,290
31 7,270   12,000   10,400   8,720 5,560   7,170   7,340