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USGS Daily Statistics for Iowa

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Boating safety tips are available from the U.S. Coast Guard.

NOTE: Station Numbers for Iowa precipitation gages have changed (see list).


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 06485950 BIG SIOUX RIVER AT SIOUX CITY, IA


Woodbury County, Iowa
Hydrologic Unit Code 10170203
Latitude  42°31'28", Longitude  96°28'48.7" NAD27
Drainage area 8,430  square miles
Contributing drainage area 7,546  square miles
Gage datum 1,060 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 2014-10-01 -> 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 2,640 1,800 2,260 8,050 8,980 10,800 9,410 2,930 2,620 5,190 4,200 3,630
2 2,600 1,790 2,270 8,040 9,340 10,100 8,460 2,850 2,530 5,190 4,130 3,630
3 2,580 1,760 2,170 7,640 9,160 9,380 7,570 2,830 2,450 4,960 4,070 3,480
4 2,520 1,730 2,150 7,170 9,040 8,500 7,070 2,890 2,420 4,860 4,110 3,350
5 2,490 1,700 2,200 6,730 8,660 7,720 6,620 2,850 2,700 5,150 4,110 2,730
6 2,450 1,670 2,300 6,330 7,890 7,060 6,290 2,900 2,600 5,530 4,120 2,630
7 2,450 1,610 2,350 6,050 7,050 6,600 6,350 2,860 2,520 6,010 4,150 2,550
8 2,410 1,550 2,650 5,900 6,560 6,320 6,570 2,760 2,530 6,090 4,190 2,570
9 2,330 1,540 2,860 6,060 6,300 6,160 6,660 2,690 2,410 6,050 4,180 2,570
10 2,240 1,540 2,810 6,570 6,190 6,020 6,560 2,620 2,330 6,170 4,180 2,570
11 2,130 1,580 2,690 7,050 6,010 5,940 5,950 2,490 2,420 6,370 4,140 2,530
12 2,020 1,660 2,670 6,990 6,300 5,720 5,580 2,420 2,630 6,430 4,030 2,570
13 1,940 1,850 3,900 6,840 6,930 5,320 5,600 2,440 3,070 6,710 3,840 2,690
14 1,900 2,150 6,510 6,800 7,130 5,220 5,850 2,510 4,040 6,990 3,740 2,770
15 1,850 2,130 8,310 6,730 7,250 5,340 5,570 2,570 5,330 7,000 3,760 2,780
16 1,750 2,020 11,700 6,730 6,860 5,310 5,470 2,560 6,610 6,520 3,830 2,760
17 1,700 1,960 14,200 6,680 6,590 5,490 5,450 2,550 8,250 6,030 3,910 2,700
18 1,670 1,940 12,200 6,680 6,510 5,770 5,360 2,620 9,270 5,700 3,970 2,580
19 1,670 1,960 10,500 6,880 6,310 5,660 5,320 2,750 9,350 5,450 3,990 2,520
20 1,710 2,130 9,650 7,250 6,470 5,460 5,500 2,870 8,960 5,260 4,060 2,440
21 1,760 2,410 9,080 7,590 6,350 5,610 5,330 2,850 8,920 5,060 4,210 2,360
22 1,840 2,600 8,620 7,660 6,180 6,060 4,970 2,950 9,320 4,890 4,180 2,440
23 2,040 2,760 8,470 7,620 6,230 6,510 4,780 3,010 9,760 4,720 4,060 2,430
24 2,240 2,780 8,310 7,670 6,760 8,440 4,600 3,020 10,700 4,690 3,980 2,490
25 2,240 2,700 8,280 8,020 6,840 10,800 4,380 2,980 10,800 4,640 3,910 2,380
26 2,080 2,620 8,210 8,370 7,130 11,700 4,170 3,000 9,640 4,580 3,830 2,440
27 1,920 2,680 8,010 8,500 7,870 10,400 3,970 2,820 8,120 4,520 3,660 2,570
28 1,860 2,740 8,090 8,460 8,180 9,820 3,690 2,760 7,070 4,440 3,520 2,670
29 1,840 5,900 8,220 8,210 8,760 10,500 3,490 2,700 6,330 4,330 3,580 2,730
30 1,820   8,080 8,330 10,200 10,600 3,230 2,860 5,610 4,220 3,760 2,720
31 1,810   7,850   11,100   3,040 2,800   4,210   2,670