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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 -> 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 8,090 6,250 10,300 16,000 19,000 24,100 27,000 10,100 8,840 12,500 9,980 7,330
2 7,940 6,390 10,000 15,700 19,000 24,200 27,600 9,310 8,770 11,800 9,850 7,670
3 8,030 6,520 9,830 16,100 18,700 23,800 27,800 9,070 9,310 11,100 9,500 7,870
4 7,600 6,620 9,860 15,900 19,600 23,300 26,900 8,860 9,360 10,800 9,230 7,470
5 7,080 6,570 10,200 15,600 19,800 22,400 25,600 8,610 9,460 10,800 9,180 7,170
6 6,650 6,660 10,500 15,400 19,200 21,000 24,100 8,450 9,040 10,900 9,270 7,030
7 6,440 6,800 10,800 14,900 18,800 19,400 23,500 8,060 9,190 11,300 9,260 6,870
8 6,600 6,930 10,900 14,500 18,500 18,700 22,300 7,570 9,930 12,000 8,860 6,750
9 6,920 6,980 11,400 14,200 18,400 18,200 20,700 7,380 10,200 12,300 8,240 6,610
10 6,810 6,690 13,400 14,000 18,300 18,400 19,700 7,660 10,500 12,200 7,840 6,390
11 6,670 6,480 16,600 14,600 18,600 18,700 19,900 7,970 10,700 12,000 7,650 6,110
12 6,530 6,390 18,000 14,600 18,400 18,200 19,500 8,530 10,700 12,000 7,580 5,900
13 6,220 5,810 18,600 13,700 18,500 18,500 18,900 9,570 10,200 12,100 7,560 5,800
14 5,870 5,550 18,700 13,000 18,600 19,100 18,100 9,630 10,000 12,000 7,330 6,140
15 5,740 5,430 18,900 13,300 18,600 19,700 17,300 9,020 9,420 12,000 7,140 6,650
16 5,680 5,400 19,400 13,800 18,700 20,100 16,700 8,540 8,690 11,600 6,930 7,060
17 5,690 5,420 19,300 14,200 18,100 20,200 15,900 8,020 7,860 11,100 6,900 7,260
18 5,790 5,960 18,600 15,400 17,800 20,200 14,900 7,310 7,360 10,600 7,000 7,250
19 5,810 6,860 18,600 17,300 17,800 20,000 14,100 6,910 7,580 9,900 7,100 6,900
20 5,710 7,560 19,000 18,600 17,600 19,800 13,700 6,860 7,780 9,190 7,040 6,770
21 5,940 9,340 19,400 17,600 17,300 20,800 13,400 6,800 7,810 8,570 6,900 6,830
22 6,190 10,100 19,100 16,400 17,300 22,300 12,500 6,820 7,990 8,160 6,730 6,910
23 6,230 9,590 18,300 15,400 17,300 23,100 13,000 6,360 8,030 8,310 6,660 6,950
24 6,510 9,960 17,900 15,300 17,400 23,200 12,600 6,150 8,410 8,740 6,490 7,000
25 6,730 10,800 17,700 15,900 17,800 24,100 12,600 6,390 8,990 9,160 6,660 6,970
26 6,880 11,000 17,400 16,100 18,800 25,000 12,400 6,340 9,460 9,520 7,050 7,450
27 7,040 10,600 17,200 16,400 20,500 25,900 12,200 6,600 10,000 9,500 7,760 7,680
28 6,930 10,600 17,100 16,800 21,700 26,700 11,600 7,390 10,800 9,290 8,110 7,870
29 6,560 10,300 16,800 17,600 22,800 26,400 11,100 8,270 12,100 9,120 8,000 8,090
30 6,360   16,600 18,400 23,900 26,300 10,900 8,890 12,800 9,480 7,640 8,210
31 6,280   16,200   24,300   10,700 9,150   9,820   8,230