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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 04116000 GRAND RIVER AT IONIA, MI


Ionia County, Michigan
Hydrologic Unit Code 04050006
Latitude  42°58'19", Longitude  85°04'09" NAD27
Drainage area 2,840  square miles
Gage datum 614.63 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 1930-10-01 -> 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 2,510 2,370 3,450 4,570 3,550 2,260 1,750 937 845 1,170 1,360 2,060
2 2,490 2,360 3,450 4,590 3,550 2,210 1,660 895 859 1,350 1,460 2,050
3 2,430 2,290 3,490 4,570 3,480 2,170 1,550 875 820 1,400 1,510 2,060
4 2,350 2,250 3,690 4,530 3,370 2,080 1,470 875 819 1,450 1,520 2,040
5 2,310 2,230 3,910 4,510 3,200 2,020 1,420 879 796 1,400 1,530 2,000
6 2,330 2,200 4,130 4,550 3,040 1,940 1,380 866 790 1,340 1,610 1,980
7 2,250 2,140 4,190 4,690 2,930 1,880 1,310 857 806 1,330 1,620 1,950
8 2,180 2,130 4,190 4,670 2,850 1,870 1,290 854 816 1,270 1,570 1,950
9 2,150 2,150 4,190 4,580 2,750 1,850 1,320 864 843 1,230 1,550 1,930
10 2,150 2,230 4,250 4,490 2,790 1,800 1,300 859 879 1,190 1,550 1,930
11 2,160 2,280 4,390 4,380 2,910 1,790 1,270 862 890 1,180 1,560 1,900
12 2,240 2,310 4,540 4,370 2,970 1,780 1,270 859 914 1,160 1,570 1,910
13 2,290 2,320 4,710 4,320 3,000 1,800 1,260 855 923 1,130 1,550 1,950
14 2,310 2,270 4,860 4,210 3,010 1,800 1,290 825 928 1,130 1,560 1,950
15 2,280 2,230 5,020 4,100 2,990 1,820 1,250 829 967 1,150 1,580 1,980
16 2,210 2,240 5,030 4,060 3,050 1,780 1,190 844 991 1,180 1,610 1,990
17 2,150 2,300 4,910 3,970 3,060 1,720 1,110 869 977 1,190 1,620 1,950
18 2,210 2,460 4,700 3,900 3,040 1,700 1,050 882 960 1,210 1,620 1,920
19 2,180 2,610 4,510 3,890 3,160 1,740 1,020 854 940 1,200 1,640 1,870
20 2,110 2,720 4,460 3,910 3,200 1,810 991 859 913 1,230 1,670 1,830
21 2,100 3,020 4,390 3,980 3,100 1,840 981 909 908 1,220 1,690 1,830
22 2,110 3,310 4,340 3,930 3,050 1,830 976 910 930 1,200 1,680 1,830
23 2,180 3,450 4,330 3,860 2,940 1,790 983 924 991 1,220 1,640 1,840
24 2,260 3,440 4,330 3,790 2,820 1,800 932 909 1,030 1,280 1,660 1,840
25 2,320 3,470 4,320 3,740 2,700 1,820 943 912 997 1,350 1,700 1,910
26 2,310 3,510 4,310 3,740 2,580 1,860 957 873 986 1,360 1,680 1,930
27 2,260 3,470 4,280 3,700 2,490 1,890 935 857 1,010 1,380 1,700 1,960
28 2,240 3,460 4,280 3,660 2,420 1,870 897 865 1,020 1,390 1,840 2,100
29 2,220 2,640 4,330 3,670 2,390 1,840 928 872 1,010 1,340 1,940 2,160
30 2,260   4,400 3,580 2,320 1,800 956 875 1,030 1,320 2,020 2,270
31 2,340   4,460   2,280   959 848   1,350   2,360