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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.
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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 -> 2026-09-30)

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 4,550 3,520 2,260 1,760 936 840 1,160 1,350 2,060
2 2,490 2,360 3,450 4,570 3,530 2,200 1,660 893 853 1,340 1,450 2,050
3 2,430 2,290 3,490 4,590 3,460 2,160 1,550 873 815 1,390 1,500 2,060
4 2,350 2,250 3,690 4,570 3,340 2,080 1,470 872 815 1,440 1,510 2,040
5 2,310 2,230 3,910 4,580 3,190 2,010 1,420 876 795 1,390 1,520 2,000
6 2,330 2,200 4,130 4,610 3,040 1,930 1,380 862 788 1,330 1,590 1,980
7 2,250 2,140 4,190 4,750 2,950 1,890 1,310 854 802 1,320 1,610 1,950
8 2,180 2,130 4,180 4,720 2,880 1,870 1,290 848 811 1,260 1,560 1,950
9 2,150 2,150 4,180 4,610 2,780 1,850 1,320 859 838 1,220 1,540 1,930
10 2,150 2,230 4,230 4,520 2,820 1,800 1,290 854 873 1,180 1,540 1,930
11 2,160 2,280 4,370 4,400 2,920 1,790 1,270 857 884 1,170 1,550 1,900
12 2,240 2,310 4,520 4,380 2,980 1,780 1,270 854 907 1,150 1,550 1,910
13 2,290 2,320 4,680 4,320 3,000 1,800 1,260 853 917 1,120 1,540 1,950
14 2,310 2,270 4,830 4,200 3,000 1,790 1,280 822 921 1,120 1,550 1,950
15 2,280 2,230 4,990 4,100 2,990 1,810 1,250 826 959 1,140 1,570 1,980
16 2,210 2,240 5,000 4,050 3,040 1,780 1,180 840 983 1,170 1,600 1,990
17 2,150 2,300 4,880 3,960 3,050 1,710 1,110 865 969 1,180 1,610 1,950
18 2,210 2,460 4,680 3,890 3,030 1,690 1,040 877 952 1,200 1,600 1,920
19 2,180 2,610 4,490 3,870 3,150 1,740 1,010 850 932 1,190 1,620 1,870
20 2,110 2,720 4,440 3,900 3,190 1,810 988 855 905 1,240 1,660 1,830
21 2,100 3,020 4,360 3,960 3,090 1,840 980 908 901 1,220 1,690 1,830
22 2,110 3,310 4,320 3,910 3,040 1,830 973 906 922 1,200 1,680 1,830
23 2,180 3,450 4,310 3,840 2,940 1,790 979 919 983 1,220 1,640 1,840
24 2,260 3,440 4,300 3,770 2,810 1,800 929 904 1,020 1,280 1,660 1,840
25 2,320 3,470 4,290 3,720 2,700 1,820 938 907 991 1,350 1,700 1,910
26 2,310 3,510 4,280 3,720 2,580 1,860 956 868 979 1,350 1,680 1,930
27 2,260 3,470 4,250 3,680 2,490 1,890 933 852 999 1,370 1,700 1,960
28 2,240 3,460 4,250 3,630 2,410 1,870 895 860 1,010 1,380 1,840 2,100
29 2,220 2,640 4,300 3,650 2,390 1,840 925 867 1,010 1,330 1,940 2,160
30 2,260   4,370 3,550 2,310 1,800 955 870 1,020 1,310 2,020 2,270
31 2,340   4,440   2,270   958 843   1,340   2,360