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USGS Surface-Water 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 05440700 ROCK RIVER AT BYRON, IL


Ogle County, Illinois
Hydrologic Unit Code 07090005
Latitude  42°07'19.88", Longitude  89°15'19.31" NAD83
Drainage area 7,990  square miles
Contributing drainage area 7,990.00  square miles
Gage datum 666.00 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 1999-10-01 -> 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 6,930 6,090 8,630 11,400 11,100 9,470 9,690 6,120 5,230 5,260 6,160 6,270
2 6,790 5,990 8,780 11,300 10,800 9,560 9,260 5,920 5,240 5,500 6,060 6,350
3 6,600 5,990 8,780 11,400 10,600 9,370 9,160 5,650 5,430 5,790 5,980 6,400
4 6,500 5,950 8,730 11,400 10,400 9,690 8,760 5,550 5,520 5,930 5,970 6,300
5 6,320 5,920 8,730 11,500 10,200 9,950 8,410 5,460 5,600 5,990 5,990 6,140
6 6,250 5,850 8,730 11,400 9,940 9,630 8,240 5,390 5,460 6,200 6,020 5,920
7 6,260 5,930 8,670 11,300 9,720 9,300 8,010 5,540 5,300 6,290 6,000 5,750
8 6,310 6,360 8,830 11,200 9,480 9,060 7,810 5,830 5,270 6,260 5,920 5,650
9 6,350 6,610 9,190 11,200 9,390 9,240 7,540 5,870 5,300 6,090 5,980 5,620
10 6,320 6,860 10,100 11,300 9,400 9,400 7,310 5,700 5,300 5,930 6,120 5,690
11 6,290 7,030 11,100 11,500 9,520 9,410 7,230 5,590 5,390 5,980 6,080 5,630
12 6,370 6,950 11,700 11,500 9,670 9,600 7,200 5,510 5,860 5,920 6,040 5,530
13 6,400 6,910 12,300 11,500 9,990 10,100 7,350 5,310 6,330 5,830 5,920 5,590
14 6,310 6,870 12,500 11,300 10,200 10,200 7,170 5,310 6,510 5,840 5,800 5,820
15 6,120 6,900 12,500 11,300 10,200 10,200 6,930 5,180 6,450 5,970 5,770 6,070
16 5,990 6,950 12,300 11,300 10,300 10,100 6,790 4,960 6,090 6,050 5,690 6,180
17 6,150 7,050 12,100 11,300 10,000 9,850 6,600 4,830 5,890 6,020 5,650 5,990
18 6,260 7,250 11,800 11,600 10,000 9,610 6,440 4,670 5,740 6,010 5,700 5,900
19 6,100 7,360 11,600 11,500 10,100 10,100 6,280 4,740 5,670 5,880 5,770 5,800
20 5,880 7,680 11,500 11,500 9,760 10,500 6,490 5,110 5,630 5,770 5,720 5,690
21 5,810 8,220 11,500 11,400 9,510 10,300 6,590 5,370 5,550 5,600 5,690 5,810
22 5,820 8,190 11,300 11,000 9,420 10,100 6,820 5,660 5,650 5,550 5,710 5,950
23 5,850 8,030 11,100 10,800 9,580 10,000 6,980 5,720 5,940 5,730 5,630 6,020
24 6,000 8,380 11,000 10,500 9,710 9,790 7,570 5,720 5,840 6,000 5,570 6,310
25 6,120 8,820 11,200 10,400 9,600 9,590 7,560 5,840 5,590 6,120 5,560 6,410
26 6,130 8,620 11,400 10,300 9,350 9,750 7,080 5,920 5,510 6,230 5,670 6,400
27 6,060 8,710 11,300 10,500 9,220 10,100 6,950 5,920 5,470 6,430 5,990 6,490
28 6,030 8,820 11,300 10,400 9,270 9,920 6,910 5,850 5,330 6,530 6,180 6,910
29 6,010 7,180 11,300 10,400 9,200 9,980 6,890 5,840 5,260 6,390 6,230 7,180
30 5,860   11,200 10,700 9,230 9,950 6,640 5,670 5,260 6,330 6,250 7,200
31 6,040   11,200   9,370   6,390 5,430   6,310   7,010