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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 05453100 Iowa River at Marengo, IA


Iowa County, Iowa
Hydrologic Unit Code 07080208
Latitude  41°48'45.8", Longitude  92°03'52.6" NAD27
Drainage area 2,794  square miles
Gage datum 720.45 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 1956-10-01 -> 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 1,090 898 2,060 3,660 3,430 4,050 3,830 1,790 1,360 1,280 1,260 1,140
2 1,070 936 2,060 3,640 3,280 3,970 3,680 1,710 1,340 1,380 1,390 1,140
3 1,050 916 2,100 3,670 3,170 3,850 3,560 1,580 1,330 1,390 1,370 1,100
4 1,030 924 2,320 3,650 3,160 3,650 3,530 1,510 1,400 1,340 1,350 1,070
5 992 965 2,450 3,450 3,190 3,500 3,690 1,540 1,370 1,310 1,400 1,080
6 964 974 2,430 3,370 3,190 3,360 3,510 1,570 1,350 1,300 1,330 1,080
7 927 980 2,380 3,320 3,280 3,350 3,260 1,420 1,270 1,270 1,260 1,040
8 906 1,030 2,500 3,200 3,250 3,480 3,150 1,320 1,240 1,270 1,220 1,030
9 877 1,090 2,590 3,100 3,230 3,530 3,200 1,360 1,190 1,360 1,190 1,020
10 848 1,070 2,790 3,050 3,290 3,880 3,190 1,430 1,140 1,390 1,180 983
11 839 1,070 2,910 3,020 3,300 3,780 3,180 1,400 1,080 1,360 1,170 955
12 903 1,030 2,980 2,970 3,370 4,020 3,270 1,530 1,030 1,320 1,230 940
13 980 1,020 3,300 3,000 3,440 4,190 3,140 1,480 1,110 1,300 1,190 923
14 951 1,080 3,450 3,040 3,530 4,100 3,060 1,550 1,100 1,310 1,160 1,030
15 883 1,140 3,520 3,050 3,390 4,170 2,920 1,530 1,080 1,320 1,130 1,100
16 849 1,150 3,560 3,110 3,350 4,130 2,680 1,550 1,030 1,290 1,140 1,090
17 928 1,170 3,550 3,170 3,430 4,360 2,450 1,530 992 1,240 1,130 1,100
18 914 1,340 3,770 3,340 3,430 4,450 2,620 1,470 1,110 1,250 1,140 1,170
19 904 1,590 4,020 3,420 3,370 4,410 2,760 1,430 1,100 1,230 1,140 1,170
20 935 1,790 4,230 3,510 3,250 4,360 2,730 1,460 1,100 1,210 1,140 1,150
21 932 1,950 4,090 3,510 3,220 4,270 2,580 1,360 1,160 1,180 1,160 1,120
22 920 2,080 4,060 3,410 3,180 4,200 2,330 1,370 1,110 1,160 1,150 1,110
23 992 2,190 4,130 3,310 3,140 4,280 2,180 1,290 1,170 1,250 1,140 1,080
24 940 2,180 3,980 3,290 3,240 4,180 2,080 1,230 1,150 1,300 1,100 1,060
25 905 2,130 3,640 3,270 3,280 4,130 2,010 1,160 1,270 1,280 1,110 1,070
26 847 2,100 3,440 3,180 3,380 4,000 1,990 1,190 1,340 1,270 1,100 1,110
27 853 2,170 3,360 3,160 3,730 3,910 1,920 1,350 1,310 1,230 1,120 1,130
28 853 2,120 3,350 3,160 4,000 3,810 1,890 1,470 1,260 1,190 1,130 1,210
29 835 2,140 3,310 3,290 4,260 3,730 1,860 1,550 1,260 1,160 1,130 1,210
30 863   3,440 3,460 4,220 3,850 1,820 1,650 1,260 1,210 1,140 1,180
31 899   3,720   4,130   1,780 1,450   1,200   1,140