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USGS Daily Statistics for Iowa

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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 05421740 Wapsipinicon River near Anamosa, IA


Jones County, Iowa
Hydrologic Unit Code 07080103
Latitude  42°05'00.1", Longitude  91°16'02.6" NAD83
Drainage area 1,575  square miles
Gage datum 754.37 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 2001-10-01 -> 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
1 964 625 1,390 2,280 3,130 4,170 3,180 1,030 1,070 1,060 1,090 789
2 922 618 1,330 2,260 2,890 4,040 2,930 897 1,170 1,150 1,060 804
3 888 633 1,270 2,270 2,750 3,600 2,830 811 1,480 1,510 976 784
4 875 685 1,220 2,320 2,670 3,090 2,790 770 1,500 1,660 981 746
5 852 666 1,290 2,380 2,620 2,770 2,700 749 1,590 1,450 1,010 731
6 843 634 1,340 2,450 2,570 2,610 2,510 724 1,650 1,320 981 736
7 883 653 1,400 2,420 2,550 2,560 2,280 912 1,700 1,290 944 713
8 887 672 1,540 2,360 2,530 2,540 2,260 1,030 1,620 1,350 919 667
9 829 696 1,720 2,300 2,540 2,610 2,270 1,010 1,440 1,370 886 639
10 782 723 2,170 2,170 2,560 2,890 2,470 1,010 1,330 1,420 856 603
11 736 765 2,460 2,080 2,610 3,130 2,420 968 1,210 1,520 853 576
12 686 777 2,490 2,050 2,570 3,580 2,170 913 1,090 1,450 848 563
13 673 745 2,740 2,050 2,540 3,910 2,020 846 991 1,290 848 557
14 658 727 3,100 2,110 2,560 3,620 1,850 798 944 1,280 835 665
15 640 733 3,310 2,100 2,660 3,340 1,620 734 894 1,290 806 764
16 616 764 3,320 2,170 2,640 3,150 1,450 696 939 1,210 781 814
17 622 784 3,420 2,180 2,550 3,030 1,410 654 905 1,110 765 951
18 622 822 3,390 2,420 2,450 2,930 1,380 642 843 1,060 752 967
19 666 893 3,220 2,500 2,320 2,910 1,400 609 826 987 735 848
20 730 1,020 3,210 2,530 2,190 2,780 1,300 628 860 938 715 768
21 797 1,130 3,170 2,560 2,160 2,670 1,230 697 925 909 701 733
22 836 1,190 3,000 2,610 2,280 2,870 1,200 766 1,060 888 691 722
23 830 1,230 2,760 2,630 2,420 3,220 1,230 883 1,240 941 688 708
24 826 1,300 2,650 2,630 2,810 3,340 1,450 895 1,340 1,070 683 691
25 812 1,310 2,570 2,740 3,360 3,300 2,290 850 1,590 1,170 688 722
26 769 1,280 2,560 2,970 3,550 3,490 2,830 856 1,840 1,150 698 789
27 723 1,350 2,550 3,180 3,570 3,690 2,670 1,130 1,950 1,090 733 862
28 693 1,390 2,490 3,420 3,660 3,570 2,170 1,400 1,840 1,060 753 921
29 689 1,030 2,420 3,570 3,640 3,400 1,700 1,120 1,580 1,030 761 959
30 664   2,350 3,430 3,610 3,430 1,400 1,050 1,270 1,090 772 995
31 649   2,290   4,060   1,210 1,000   1,080   972