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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 05453520 Iowa River below Coralville Dam nr Coralville, IA


Johnson County, Iowa
Hydrologic Unit Code 07080208
Latitude  41°42'55.06", Longitude  91°31'48.6" NAD83
Drainage area 3,115  square miles
Gage datum 599.70 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 1992-10-01 -> 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 1,660 980 2,480 3,610 4,100 4,870 5,500 2,790 2,000 1,360 1,530 1,520
2 1,600 992 2,350 3,540 3,970 4,910 5,570 2,800 2,020 1,380 1,600 1,560
3 1,480 1,010 2,280 3,490 3,990 4,850 5,730 2,640 1,990 1,530 1,660 1,600
4 1,460 1,050 2,240 3,460 3,970 4,810 5,690 2,380 2,000 1,670 1,640 1,660
5 1,440 1,090 2,280 3,400 3,960 4,810 5,690 2,310 1,980 1,620 1,650 1,650
6 1,360 1,110 2,330 3,370 4,090 4,790 5,650 2,240 1,920 1,590 1,660 1,670
7 1,360 1,130 2,350 3,310 4,190 4,810 5,450 2,190 1,800 1,600 1,610 1,660
8 1,420 1,160 2,450 3,330 4,080 4,870 5,320 2,180 1,720 1,550 1,520 1,670
9 1,420 1,250 2,690 3,430 4,010 4,890 5,240 2,120 1,690 1,440 1,480 1,690
10 1,340 1,300 2,890 3,450 3,890 4,750 5,020 2,040 1,800 1,480 1,480 1,660
11 1,290 1,330 3,030 3,410 3,710 4,710 5,000 2,090 1,750 1,560 1,520 1,640
12 1,250 1,360 3,220 3,480 3,760 4,970 4,910 2,100 1,630 1,560 1,530 1,680
13 1,140 1,400 3,580 3,530 3,800 5,290 4,740 2,120 1,700 1,520 1,530 1,720
14 1,100 1,460 3,940 3,400 3,920 5,330 4,840 2,110 1,690 1,480 1,540 1,640
15 1,070 1,520 4,080 3,320 3,970 5,220 4,790 2,070 1,720 1,630 1,480 1,620
16 1,030 1,520 4,110 3,420 3,940 5,030 4,620 1,910 1,610 1,700 1,470 1,620
17 1,040 1,550 4,040 3,530 4,100 5,040 4,480 1,880 1,500 1,730 1,400 1,600
18 986 1,590 3,920 3,410 4,140 5,070 4,300 1,910 1,460 1,630 1,440 1,570
19 915 1,650 3,650 3,150 4,050 5,040 4,180 1,890 1,470 1,550 1,430 1,510
20 920 1,870 3,590 3,070 3,890 5,010 4,080 1,920 1,420 1,660 1,500 1,450
21 916 2,070 3,510 3,110 3,850 4,920 4,040 1,960 1,410 1,680 1,500 1,410
22 915 2,120 3,550 3,080 4,040 4,870 3,900 1,920 1,390 1,670 1,390 1,390
23 960 2,210 3,610 3,100 4,160 4,750 3,670 1,960 1,400 1,690 1,350 1,350
24 1,100 2,250 3,600 3,200 4,280 4,680 3,420 1,930 1,400 1,750 1,380 1,260
25 1,200 2,320 3,610 3,350 4,260 4,800 3,260 1,870 1,360 1,820 1,430 1,260
26 1,170 2,490 3,690 3,690 4,200 4,900 3,190 1,870 1,210 1,830 1,450 1,330
27 1,090 2,700 3,730 4,050 4,230 5,060 3,200 1,840 1,250 1,780 1,470 1,430
28 1,030 2,620 3,700 4,270 4,220 5,160 3,230 1,860 1,250 1,740 1,490 1,510
29 1,010 2,390 3,650 4,300 4,290 5,210 3,260 1,790 1,260 1,710 1,470 1,630
30 984   3,610 4,270 4,550 5,330 3,140 1,840 1,350 1,640 1,480 1,680
31 950   3,650   4,770   2,950 1,960   1,570   1,670