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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 4,550 3,520 2,260 1,760 936 845 1,170 1,360 2,060
2 2,490 2,360 3,450 4,570 3,530 2,200 1,660 893 859 1,350 1,460 2,050
3 2,430 2,290 3,490 4,590 3,460 2,160 1,550 873 820 1,400 1,510 2,060
4 2,350 2,250 3,690 4,570 3,340 2,080 1,470 872 819 1,450 1,520 2,040
5 2,310 2,230 3,910 4,580 3,190 2,010 1,420 876 796 1,400 1,530 2,000
6 2,330 2,200 4,130 4,610 3,040 1,930 1,380 862 790 1,340 1,610 1,980
7 2,250 2,140 4,190 4,750 2,950 1,890 1,310 854 806 1,330 1,620 1,950
8 2,180 2,130 4,180 4,720 2,880 1,870 1,290 848 816 1,270 1,570 1,950
9 2,150 2,150 4,180 4,610 2,780 1,850 1,320 859 843 1,230 1,550 1,930
10 2,150 2,230 4,230 4,520 2,820 1,800 1,290 854 879 1,190 1,550 1,930
11 2,160 2,280 4,370 4,400 2,920 1,790 1,270 857 890 1,180 1,560 1,900
12 2,240 2,310 4,520 4,380 2,980 1,780 1,270 854 914 1,160 1,570 1,910
13 2,290 2,320 4,680 4,320 3,000 1,800 1,260 855 923 1,130 1,550 1,950
14 2,310 2,270 4,830 4,200 3,000 1,790 1,280 825 928 1,130 1,560 1,950
15 2,280 2,230 4,990 4,100 2,990 1,810 1,250 829 967 1,150 1,580 1,980
16 2,210 2,240 5,000 4,050 3,040 1,780 1,180 844 991 1,180 1,610 1,990
17 2,150 2,300 4,880 3,960 3,050 1,710 1,110 869 977 1,190 1,620 1,950
18 2,210 2,460 4,680 3,890 3,030 1,690 1,040 882 960 1,210 1,620 1,920
19 2,180 2,610 4,490 3,870 3,150 1,740 1,010 854 940 1,200 1,640 1,870
20 2,110 2,720 4,440 3,900 3,190 1,810 988 859 913 1,230 1,670 1,830
21 2,100 3,020 4,360 3,960 3,090 1,840 980 909 908 1,220 1,690 1,830
22 2,110 3,310 4,320 3,910 3,040 1,830 973 910 930 1,200 1,680 1,830
23 2,180 3,450 4,310 3,840 2,940 1,790 979 924 991 1,220 1,640 1,840
24 2,260 3,440 4,300 3,770 2,810 1,800 929 909 1,030 1,280 1,660 1,840
25 2,320 3,470 4,290 3,720 2,700 1,820 938 912 997 1,350 1,700 1,910
26 2,310 3,510 4,280 3,720 2,580 1,860 956 873 986 1,360 1,680 1,930
27 2,260 3,470 4,250 3,680 2,490 1,890 933 857 1,010 1,380 1,700 1,960
28 2,240 3,460 4,250 3,630 2,410 1,870 895 865 1,020 1,390 1,840 2,100
29 2,220 2,640 4,300 3,650 2,390 1,840 925 872 1,010 1,340 1,940 2,160
30 2,260   4,370 3,550 2,310 1,800 955 875 1,030 1,320 2,020 2,270
31 2,340   4,440   2,270   958 848   1,350   2,360