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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 05462000 Shell Rock River at Shell Rock, IA


Butler County, Iowa
Hydrologic Unit Code 07080202
Latitude  42°42'42.93", Longitude  92°34'58.68" NAD83
Drainage area 1,746  square miles
Gage datum 885.36 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 1953-10-01 -> 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
1 571 357 1,040 2,690 1,960 2,160 2,120 944 1,070 1,040 847 630
2 547 363 1,190 2,600 1,950 1,900 1,900 908 1,070 1,000 835 628
3 522 352 1,120 2,360 1,940 1,770 1,770 884 953 999 845 622
4 498 360 1,130 2,290 1,930 1,730 1,680 866 844 1,000 810 608
5 488 365 1,100 2,330 1,970 1,730 1,580 837 863 986 784 594
6 473 361 1,080 2,340 2,020 1,750 1,560 836 985 996 759 591
7 459 367 1,230 2,270 2,010 1,680 1,650 838 887 977 761 583
8 446 393 1,270 2,100 1,940 1,740 1,590 852 846 975 759 576
9 435 452 1,290 2,050 1,890 2,470 1,660 892 867 1,020 730 568
10 418 469 1,360 1,920 1,930 2,790 1,710 936 842 1,060 718 551
11 396 417 1,450 1,850 2,020 2,300 1,600 957 816 1,040 741 531
12 392 425 1,580 1,890 1,950 2,010 1,590 946 758 1,020 745 539
13 386 410 1,640 2,000 1,940 2,090 1,470 844 702 1,010 744 566
14 379 429 1,730 2,000 1,970 2,180 1,460 831 714 940 731 598
15 363 463 1,940 2,150 1,950 2,020 1,450 807 698 889 725 625
16 356 520 2,060 2,140 1,820 2,020 1,400 771 748 859 711 629
17 370 523 2,050 2,080 1,760 1,990 1,380 757 812 821 708 602
18 397 571 2,040 1,990 1,880 2,100 1,430 802 825 801 706 579
19 396 634 2,050 1,920 1,960 2,180 1,450 818 831 785 713 563
20 407 704 2,100 1,980 1,970 2,210 1,480 878 1,070 780 728 547
21 420 787 2,120 2,110 1,860 2,300 1,460 884 1,280 798 739 531
22 440 862 1,980 2,120 2,050 2,450 1,300 900 1,400 818 760 519
23 440 847 1,920 2,000 2,240 2,540 1,230 1,040 1,690 860 753 507
24 425 823 1,950 1,920 2,180 2,540 1,200 1,240 1,440 904 726 492
25 404 742 2,010 1,920 2,060 2,400 1,210 1,150 1,210 878 696 490
26 393 687 2,140 1,950 1,980 2,470 1,190 1,160 1,150 835 688 497
27 373 713 2,320 1,890 2,010 2,560 1,170 1,070 1,110 845 676 516
28 368 841 2,500 1,890 2,070 2,430 1,130 996 1,050 830 673 598
29 367 1,150 2,430 2,030 2,140 2,200 1,100 1,090 1,060 800 661 629
30 362   2,440 2,000 2,130 2,230 1,040 1,120 1,090 820 638 611
31 360   2,500   2,220   973 1,070   852   605