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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 8,730 6,450 11,400 17,500 18,900 23,500 26,200 9,690 8,940 13,200 10,500 7,630
2 8,550 6,620 11,100 16,800 19,000 23,800 26,400 8,780 8,940 12,500 10,300 8,030
3 8,660 6,820 10,900 16,300 18,800 23,700 26,500 8,550 9,560 11,700 9,920 8,260
4 8,220 7,030 10,900 15,900 19,600 23,300 25,500 8,440 9,650 11,400 9,620 7,820
5 7,780 6,960 11,200 15,900 20,000 22,600 24,100 8,280 9,780 11,400 9,480 7,500
6 7,330 7,110 11,400 16,000 19,500 21,200 22,700 8,160 9,350 11,500 9,390 7,820
7 7,130 7,280 11,500 15,600 19,100 19,600 22,200 7,790 9,530 11,900 9,260 7,620
8 7,320 7,450 11,700 15,200 18,700 18,800 21,000 7,330 10,300 12,700 8,850 7,390
9 7,630 7,490 12,300 14,800 18,500 18,300 19,300 7,170 10,600 12,900 8,330 7,190
10 7,510 7,160 14,500 14,700 18,400 18,500 18,000 7,510 10,900 12,900 7,970 6,900
11 7,300 6,920 18,200 15,500 18,700 19,000 17,900 7,870 11,200 12,700 7,800 6,640
12 7,100 6,870 19,800 15,600 18,500 18,500 17,100 8,490 11,100 12,700 7,750 6,420
13 6,730 6,270 20,500 14,600 18,500 19,100 16,400 9,610 10,600 12,800 7,740 6,350
14 6,370 5,920 20,600 13,800 18,400 19,900 15,800 9,710 10,500 12,700 7,510 6,730
15 6,280 5,700 20,800 14,300 18,300 20,600 15,200 9,060 9,850 12,700 7,330 7,280
16 6,240 5,650 21,400 14,900 18,500 21,100 14,500 8,350 9,070 12,300 7,110 7,700
17 6,230 5,740 21,200 15,300 18,100 21,300 13,800 7,760 8,190 11,800 7,090 7,870
18 6,290 6,400 20,500 16,700 18,100 21,100 12,900 7,170 7,660 11,200 7,200 7,810
19 6,280 7,450 20,600 18,800 18,300 20,900 12,100 6,820 7,900 10,400 7,300 7,410
20 6,160 8,290 21,000 20,300 18,200 20,500 11,700 6,810 8,120 9,680 7,240 7,300
21 6,290 10,300 21,400 19,100 17,700 21,500 11,300 6,790 8,150 9,020 7,070 7,420
22 6,510 11,200 21,200 17,300 17,300 23,000 11,700 6,840 8,350 8,590 6,890 7,560
23 6,550 10,600 20,300 16,000 16,900 23,700 12,300 6,360 8,390 8,750 6,820 7,620
24 6,910 11,000 19,800 15,700 16,700 23,700 12,000 6,160 8,800 9,200 6,640 7,680
25 7,200 12,000 19,700 16,200 16,800 24,400 12,000 6,440 9,420 9,640 6,830 7,660
26 7,390 12,300 19,300 16,300 17,400 25,200 11,900 6,400 9,920 10,000 7,240 8,210
27 7,550 11,700 19,100 16,500 19,100 25,900 11,700 6,680 10,500 9,990 8,000 8,460
28 7,430 11,700 18,900 16,700 20,200 26,600 11,300 7,530 11,300 9,780 8,390 8,640
29 6,990 13,200 18,600 17,400 21,400 26,100 10,800 8,480 12,800 9,610 8,280 8,860
30 6,730   18,300 18,300 22,800 25,900 10,600 9,110 13,500 10,000 7,920 8,910
31 6,580   17,900   23,500   10,200 9,340   10,300   8,880