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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 05487520 Des Moines River near Swan, IA


Marion County, Iowa
Hydrologic Unit Code 07100008
Latitude  41°29'21.8", Longitude  93°16'41.6" NAD83
Drainage area 11,700  square miles
Gage datum 698.99 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 2009-10-01 -> 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 4,890 2,700 6,730 12,100 12,500 18,300 19,100 9,450 5,820 6,180 5,690 4,550
2 4,560 2,700 6,570 12,100 12,800 18,600 19,100 8,640 6,460 6,980 5,600 4,790
3 4,380 2,820 6,410 11,900 13,400 18,000 19,200 8,320 6,940 7,350 5,610 5,400
4 4,280 2,920 6,330 11,900 13,900 17,400 18,700 7,950 6,830 7,460 5,460 5,710
5 3,980 2,780 6,420 11,800 14,100 17,100 17,700 7,760 6,220 7,500 5,330 5,480
6 3,910 2,680 6,460 11,700 14,700 17,200 17,000 7,530 5,770 7,410 5,120 4,870
7 3,820 2,580 6,490 11,300 15,400 17,500 16,600 7,500 5,480 7,430 4,960 4,360
8 3,750 2,590 6,720 11,200 15,200 17,500 16,500 7,290 5,630 7,590 4,900 3,910
9 3,700 2,510 7,560 10,800 14,700 17,300 16,300 7,680 5,800 8,050 4,510 3,690
10 3,530 2,480 9,150 10,400 14,500 16,800 15,800 7,420 6,340 8,160 4,250 3,640
11 3,330 2,460 10,400 10,200 14,800 16,500 15,500 7,500 6,840 8,330 4,360 3,590
12 3,040 2,430 10,500 9,930 15,500 16,300 15,100 7,570 7,200 8,240 4,420 3,550
13 2,870 2,360 10,300 10,100 16,300 16,100 14,900 7,390 7,170 8,110 4,460 3,650
14 2,760 2,380 10,400 10,700 15,200 15,800 14,100 7,120 6,790 8,100 4,490 4,000
15 2,730 2,500 10,500 11,300 14,800 15,400 13,700 6,920 5,890 8,050 4,550 4,020
16 2,690 2,890 11,000 12,100 14,300 15,800 12,900 6,680 5,540 7,810 4,560 4,210
17 2,850 3,630 11,100 11,700 14,300 16,100 12,200 6,130 5,400 7,500 4,500 4,500
18 2,990 4,120 11,400 11,900 14,600 16,600 11,700 6,040 5,310 7,110 4,420 4,490
19 2,940 4,640 11,600 11,800 14,800 16,900 11,600 5,950 5,600 6,840 4,190 4,640
20 2,790 5,450 12,100 12,300 15,700 17,900 12,200 6,150 5,370 6,570 4,170 4,720
21 2,700 5,740 12,300 12,700 16,200 18,700 13,400 6,480 5,540 6,360 4,280 4,800
22 2,730 5,680 12,100 12,900 16,300 18,700 12,600 6,800 5,820 6,330 4,460 4,610
23 2,970 5,570 12,100 13,300 16,600 18,600 11,600 7,060 6,100 6,470 4,390 4,470
24 3,040 5,880 12,200 13,400 16,100 18,200 11,100 7,230 6,140 6,220 4,430 4,400
25 3,050 5,900 11,900 13,500 16,600 18,300 10,600 6,640 6,260 6,300 4,390 4,290
26 2,880 5,950 11,600 13,700 16,800 19,100 10,200 5,850 6,600 5,950 4,260 4,310
27 2,790 6,240 11,600 14,000 17,100 19,200 10,200 5,210 6,670 5,620 4,400 4,340
28 2,760 6,640 11,400 13,800 17,500 19,400 9,150 4,740 6,560 5,570 4,500 4,720
29 2,610 9,480 11,200 13,100 18,400 19,500 9,300 4,730 6,430 5,600 4,500 4,880
30 2,580   11,700 12,300 18,500 19,200 9,560 5,350 6,440 5,710 4,490 4,960
31 2,620   11,900   18,400   10,200 5,480   5,760   4,940