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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 05465700 Iowa River at Oakville, IA


Louisa County, Iowa
Hydrologic Unit Code 07080209
Latitude  41°06'11.5", Longitude  91°03'48.7" NAD83
Drainage area 12,630  square miles
Gage datum 535.32 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 2008-10-01 -> 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 8,250 6,260 10,800 16,600 18,300 24,800 26,200 9,690 8,940 13,200 10,500 7,630
2 8,080 6,430 10,500 16,200 18,400 24,900 26,400 8,780 8,940 12,500 10,300 8,030
3 8,180 6,610 10,300 16,600 18,200 24,600 26,500 8,550 9,560 11,700 9,920 8,260
4 7,770 6,820 10,300 16,300 19,300 23,900 25,500 8,440 9,650 11,400 9,620 7,820
5 7,350 6,760 10,600 15,900 19,700 23,000 24,100 8,280 9,780 11,400 9,480 7,500
6 6,940 6,880 10,800 15,700 19,100 21,600 22,700 8,160 9,350 11,500 9,390 7,390
7 6,740 7,030 10,900 15,200 18,800 20,000 22,200 7,790 9,530 11,900 9,260 7,200
8 6,910 7,190 11,000 14,700 18,600 19,200 21,000 7,330 10,300 12,700 8,850 6,980
9 7,220 7,280 11,600 14,400 18,500 18,700 19,300 7,170 10,600 12,900 8,330 6,790
10 7,100 7,000 13,700 14,200 18,600 18,800 18,000 7,510 10,900 12,900 7,970 6,530
11 6,890 6,760 17,100 14,900 18,900 19,200 17,900 7,870 11,200 12,700 7,800 6,280
12 6,680 6,700 18,600 14,900 18,800 18,600 17,100 8,490 11,100 12,700 7,750 6,070
13 6,340 6,110 19,300 14,000 18,900 19,000 16,400 9,610 10,600 12,800 7,740 6,010
14 6,020 5,760 19,400 13,200 19,100 19,700 15,800 9,710 10,500 12,700 7,510 6,370
15 5,940 5,540 19,600 13,600 19,100 20,300 15,200 9,060 9,850 12,700 7,330 6,870
16 5,900 5,490 20,100 14,200 19,300 20,700 14,500 8,350 9,070 12,300 7,110 7,270
17 5,900 5,550 20,000 14,700 18,700 20,700 13,800 7,760 8,190 11,800 7,090 7,430
18 5,970 6,150 19,300 15,900 18,400 20,500 12,900 7,170 7,660 11,200 7,200 7,370
19 5,960 7,130 19,400 17,900 18,400 20,300 12,100 6,820 7,900 10,400 7,300 6,990
20 5,850 7,900 19,700 19,300 18,100 20,100 11,700 6,810 8,120 9,680 7,240 6,890
21 5,980 9,790 20,100 18,200 17,600 21,000 11,300 6,790 8,150 9,020 7,070 7,020
22 6,180 10,600 19,900 16,600 17,400 22,500 11,700 6,840 8,350 8,590 6,890 7,140
23 6,230 10,000 19,000 15,400 17,300 23,200 12,300 6,360 8,390 8,750 6,820 7,190
24 6,570 10,400 18,600 15,100 17,400 23,200 12,000 6,160 8,800 9,200 6,640 7,250
25 6,850 11,300 18,500 15,600 17,800 24,000 12,000 6,440 9,420 9,640 6,830 7,240
26 7,040 11,600 18,100 15,700 18,800 25,200 11,900 6,400 9,920 10,000 7,240 7,750
27 7,210 11,000 17,900 15,900 20,600 25,900 11,700 6,680 10,500 9,990 8,000 7,990
28 7,120 11,100 17,700 16,200 21,900 26,600 11,300 7,530 11,300 9,780 8,390 8,180
29 6,740 10,300 17,500 17,000 23,100 26,100 10,800 8,480 12,800 9,610 8,280 8,380
30 6,530   17,200 17,800 24,400 25,900 10,600 9,110 13,500 10,000 7,920 8,420
31 6,370   16,900   24,900   10,200 9,340   10,300   8,400