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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°42'55.0", Longitude  91°31'48.0" NAD27
Drainage area 3,115  square miles
Gage datum 600.00 feet above NGVD29
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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 -> 2021-09-30)

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 1,830 1,070 2,610 3,910 4,240 4,960 5,780 2,900 2,230 1,520 1,700 1,670
2 1,760 1,090 2,430 3,800 4,120 5,020 5,860 2,910 2,260 1,550 1,770 1,710
3 1,640 1,110 2,340 3,710 4,150 4,920 6,010 2,760 2,230 1,720 1,840 1,760
4 1,620 1,140 2,290 3,680 4,090 4,890 5,970 2,490 2,240 1,870 1,800 1,830
5 1,600 1,190 2,320 3,630 4,060 4,900 6,000 2,430 2,220 1,820 1,790 1,810
6 1,500 1,220 2,370 3,610 4,220 4,880 6,020 2,370 2,140 1,790 1,790 1,830
7 1,510 1,230 2,410 3,550 4,330 4,910 5,850 2,330 2,020 1,800 1,760 1,820
8 1,570 1,270 2,520 3,570 4,210 5,020 5,710 2,320 1,920 1,740 1,670 1,840
9 1,580 1,360 2,780 3,680 4,090 5,090 5,650 2,260 1,900 1,610 1,610 1,860
10 1,480 1,410 3,010 3,730 3,910 4,950 5,400 2,180 2,030 1,660 1,610 1,810
11 1,410 1,430 3,190 3,700 3,700 4,920 5,370 2,240 1,970 1,750 1,650 1,770
12 1,370 1,460 3,430 3,770 3,740 5,230 5,240 2,260 1,840 1,750 1,670 1,800
13 1,250 1,490 3,860 3,830 3,790 5,630 4,990 2,280 1,920 1,710 1,670 1,850
14 1,200 1,570 4,280 3,680 3,950 5,740 5,020 2,270 1,900 1,660 1,670 1,740
15 1,180 1,660 4,450 3,600 4,030 5,650 4,890 2,170 1,940 1,830 1,620 1,700
16 1,130 1,650 4,480 3,720 4,020 5,440 4,760 2,030 1,820 1,910 1,590 1,710
17 1,130 1,700 4,420 3,860 4,240 5,460 4,630 2,010 1,690 1,950 1,520 1,690
18 1,070 1,740 4,290 3,750 4,330 5,460 4,450 2,050 1,640 1,830 1,560 1,670
19 987 1,780 3,970 3,430 4,240 5,400 4,320 2,020 1,650 1,730 1,560 1,610
20 992 2,020 3,880 3,310 4,050 5,330 4,190 2,070 1,600 1,860 1,630 1,560
21 988 2,230 3,790 3,320 3,970 5,220 4,150 2,110 1,580 1,890 1,640 1,520
22 991 2,280 3,840 3,260 4,090 5,160 4,010 2,070 1,560 1,880 1,520 1,500
23 1,050 2,390 3,870 3,230 4,200 4,990 3,770 2,110 1,570 1,900 1,470 1,480
24 1,210 2,470 3,870 3,290 4,290 4,890 3,510 2,150 1,570 1,960 1,510 1,380
25 1,320 2,560 3,910 3,400 4,200 4,990 3,370 2,070 1,530 2,030 1,570 1,390
26 1,290 2,740 4,000 3,750 4,140 5,050 3,350 2,070 1,350 2,050 1,590 1,470
27 1,200 2,920 4,030 4,170 4,140 5,220 3,400 2,040 1,410 1,980 1,620 1,570
28 1,130 2,820 4,010 4,430 4,140 5,360 3,450 2,060 1,410 1,940 1,650 1,650
29 1,110 2,690 3,960 4,470 4,240 5,430 3,480 2,000 1,410 1,890 1,620 1,780
30 1,080   3,930 4,440 4,550 5,570 3,330 2,060 1,520 1,810 1,630 1,850
31 1,040   3,970   4,830   3,100 2,190   1,730   1,840