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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 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 -> 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 1,680 997 2,540 3,770 4,130 4,770 5,520 2,740 2,030 1,390 1,570 1,560
2 1,620 1,010 2,400 3,670 3,990 4,810 5,580 2,750 2,060 1,420 1,640 1,600
3 1,510 1,030 2,330 3,600 4,020 4,750 5,720 2,610 2,040 1,580 1,700 1,640
4 1,490 1,060 2,280 3,580 4,000 4,710 5,680 2,360 2,050 1,710 1,660 1,700
5 1,470 1,100 2,310 3,530 4,000 4,710 5,700 2,300 2,030 1,660 1,660 1,690
6 1,380 1,130 2,350 3,500 4,160 4,710 5,720 2,250 1,960 1,640 1,660 1,710
7 1,380 1,150 2,370 3,440 4,250 4,730 5,550 2,210 1,850 1,640 1,620 1,700
8 1,440 1,190 2,470 3,460 4,140 4,830 5,450 2,200 1,760 1,600 1,540 1,710
9 1,450 1,270 2,710 3,560 4,070 4,900 5,370 2,140 1,730 1,480 1,500 1,730
10 1,360 1,330 2,920 3,590 3,940 4,780 5,150 2,060 1,850 1,520 1,490 1,690
11 1,300 1,360 3,050 3,550 3,740 4,750 5,120 2,110 1,800 1,600 1,540 1,650
12 1,260 1,390 3,250 3,630 3,770 5,040 5,000 2,130 1,680 1,600 1,550 1,680
13 1,160 1,430 3,620 3,680 3,800 5,410 4,770 2,150 1,750 1,560 1,560 1,720
14 1,110 1,490 3,990 3,540 3,930 5,490 4,790 2,140 1,740 1,520 1,560 1,640
15 1,090 1,560 4,140 3,470 3,980 5,410 4,670 2,050 1,760 1,670 1,510 1,620
16 1,050 1,550 4,170 3,580 3,960 5,210 4,540 1,910 1,660 1,750 1,490 1,630
17 1,050 1,590 4,110 3,690 4,150 5,220 4,400 1,890 1,540 1,780 1,420 1,600
18 1,000 1,630 3,990 3,570 4,230 5,240 4,220 1,930 1,500 1,680 1,460 1,570
19 929 1,690 3,710 3,280 4,140 5,210 4,100 1,910 1,510 1,590 1,450 1,510
20 933 1,920 3,650 3,200 3,960 5,160 3,980 1,950 1,460 1,700 1,520 1,470
21 929 2,130 3,570 3,220 3,880 5,040 3,930 1,990 1,440 1,730 1,530 1,430
22 932 2,180 3,620 3,170 3,990 4,970 3,790 1,960 1,420 1,720 1,420 1,420
23 981 2,270 3,680 3,170 4,080 4,800 3,570 2,000 1,430 1,740 1,370 1,380
24 1,130 2,310 3,660 3,260 4,160 4,710 3,320 1,970 1,430 1,800 1,410 1,280
25 1,230 2,380 3,680 3,390 4,060 4,820 3,200 1,900 1,400 1,870 1,450 1,290
26 1,200 2,560 3,870 3,750 4,010 4,910 3,170 1,910 1,240 1,880 1,480 1,360
27 1,120 2,770 3,900 4,120 4,010 5,080 3,200 1,880 1,290 1,830 1,510 1,460
28 1,050 2,680 3,880 4,340 4,010 5,170 3,260 1,900 1,290 1,790 1,530 1,530
29 1,030 2,390 3,820 4,360 4,110 5,210 3,280 1,830 1,290 1,760 1,500 1,660
30 1,000   3,780 4,320 4,400 5,330 3,140 1,880 1,390 1,680 1,520 1,710
31 966   3,820   4,660   2,920 2,000   1,610   1,690