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USGS Daily Statistics for Michigan

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NOTE: During winter months, stage and discharge may be significantly affected by backwater from ice, resulting in incorrect discharge data. Consequently, discharge data may not be displayed during periods of ice effect. Click here for more information.

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 04040000 ONTONAGON RIVER NEAR ROCKLAND, MI


Ontonagon County, Michigan
Hydrologic Unit Code 04020102
Latitude  46°43'15", Longitude  89°12'25" NAD27
Drainage area 1,340  square miles
Gage datum 638.66 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 1941-10-01 -> 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
1 812 779 894 3,220 3,160 1,570 1,140 662 759 979 1,230 1,060
2 826 771 875 3,200 2,970 1,470 1,210 723 720 932 1,370 1,010
3 819 761 859 3,250 2,850 1,380 1,270 754 759 960 1,340 979
4 813 762 858 3,260 2,650 1,300 1,260 915 749 972 1,200 1,040
5 809 770 868 3,310 2,610 1,270 1,170 862 757 1,230 1,170 1,070
6 807 760 913 3,570 2,600 1,380 1,140 752 742 1,270 1,190 1,050
7 811 774 1,010 3,830 2,500 1,360 1,050 758 693 1,260 1,140 960
8 804 776 1,080 4,030 2,410 1,300 993 737 706 1,120 1,160 922
9 804 773 1,050 3,980 2,600 1,260 1,010 695 774 1,070 1,150 907
10 803 774 1,000 3,970 2,550 1,370 967 701 808 1,240 1,260 955
11 805 768 1,050 4,200 2,370 1,360 937 681 800 1,180 1,290 914
12 802 767 1,140 4,430 2,380 1,340 916 663 747 1,180 1,270 919
13 796 778 1,290 4,640 2,190 1,310 927 646 771 1,140 1,310 908
14 795 778 1,520 4,630 2,140 1,230 915 635 764 1,140 1,300 902
15 800 797 1,700 4,540 1,970 1,310 850 604 716 1,220 1,260 933
16 787 783 1,830 4,600 1,820 1,300 811 702 728 1,160 1,400 1,010
17 776 784 1,800 4,810 1,690 1,430 826 723 825 1,070 1,360 1,010
18 776 797 1,870 4,780 1,690 1,440 837 703 816 1,080 1,310 941
19 782 806 1,770 4,830 1,730 1,370 876 669 810 1,040 1,260 900
20 773 825 1,600 4,640 1,790 1,310 848 627 761 1,020 1,260 886
21 775 865 1,600 4,540 1,740 1,320 893 729 873 1,030 1,310 879
22 777 879 1,710 4,550 1,810 1,310 846 1,090 888 1,030 1,200 860
23 784 866 1,790 4,620 1,760 1,440 849 920 830 1,110 1,130 856
24 777 873 1,910 4,530 1,780 1,470 813 814 929 1,280 1,120 872
25 779 860 1,990 4,190 1,730 1,390 771 737 948 1,550 1,110 862
26 768 878 2,030 3,800 1,720 1,320 746 710 956 1,360 1,060 886
27 786 922 2,260 3,560 1,610 1,340 712 665 986 1,270 1,060 867
28 795 888 2,570 3,420 1,520 1,260 730 701 912 1,280 1,020 863
29 797 955 2,710 3,360 1,590 1,140 714 711 878 1,190 1,070 855
30 793   2,860 3,250 1,530 1,060 683 697 913 1,210 1,100 842
31 794   2,870   1,630   679 797   1,190   839