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USGS Daily Statistics for Illinois

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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 05587450 Mississippi River at Grafton, IL


Jersey County, Illinois
Hydrologic Unit Code 07110009
Latitude  38°58'04.7", Longitude  90°25'44.4" NAD83
Drainage area 171,300  square miles
Gage datum 403.79 feet above NGVD29
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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 1986-10-01 -> 2022-09-30)

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 97,900 90,600 123,000 179,000 223,000 209,000 204,000 137,000 103,000 91,200 103,000 96,500
2 95,100 89,800 125,000 179,000 223,000 209,000 203,000 130,000 100,000 93,300 103,000 95,600
3 94,100 90,100 125,000 182,000 222,000 210,000 201,000 128,000 96,000 95,600 106,000 96,300
4 95,900 91,100 124,000 184,000 222,000 209,000 199,000 126,000 93,600 97,700 107,000 98,000
5 96,900 92,400 124,000 185,000 223,000 208,000 193,000 122,000 93,600 99,900 106,000 96,000
6 95,700 93,100 129,000 184,000 226,000 206,000 191,000 118,000 91,500 97,300 104,000 95,100
7 92,800 91,700 131,000 184,000 225,000 205,000 188,000 116,000 86,800 97,300 101,000 93,300
8 93,000 91,600 130,000 185,000 225,000 202,000 186,000 113,000 84,100 98,900 99,500 93,000
9 93,100 92,400 133,000 187,000 224,000 200,000 182,000 109,000 83,600 101,000 97,400 89,400
10 90,600 94,500 140,000 192,000 223,000 198,000 182,000 105,000 86,500 101,000 97,400 87,400
11 93,000 94,000 147,000 197,000 221,000 198,000 178,000 104,000 90,200 99,900 98,100 88,600
12 92,400 94,200 150,000 200,000 221,000 199,000 176,000 102,000 89,100 100,000 98,600 87,000
13 91,800 95,900 154,000 202,000 221,000 198,000 174,000 98,800 88,000 101,000 97,300 85,200
14 91,000 97,500 158,000 203,000 219,000 200,000 168,000 96,300 91,300 102,000 97,600 86,700
15 88,600 93,400 162,000 202,000 218,000 200,000 164,000 95,800 93,200 105,000 96,400 86,100
16 88,700 90,300 165,000 201,000 218,000 201,000 164,000 93,700 95,600 103,000 94,700 87,900
17 87,100 92,300 166,000 204,000 221,000 199,000 164,000 93,000 95,400 104,000 94,800 89,700
18 86,700 94,300 170,000 204,000 223,000 200,000 158,000 92,900 94,000 103,000 95,500 89,700
19 83,400 95,100 174,000 206,000 223,000 199,000 153,000 92,400 92,600 104,000 95,300 89,000
20 82,700 96,100 177,000 207,000 222,000 199,000 151,000 91,500 92,700 105,000 94,400 86,700
21 83,400 102,000 175,000 209,000 221,000 199,000 149,000 90,900 92,600 105,000 94,500 88,600
22 83,500 107,000 171,000 211,000 218,000 198,000 148,000 90,100 90,000 102,000 94,500 89,000
23 86,200 113,000 168,000 214,000 213,000 199,000 147,000 90,700 91,400 102,000 92,000 88,300
24 87,700 116,000 169,000 214,000 208,000 202,000 147,000 92,500 89,600 103,000 91,800 89,700
25 90,200 119,000 170,000 214,000 206,000 205,000 146,000 94,500 89,000 104,000 93,100 89,200
26 91,800 121,000 172,000 214,000 208,000 210,000 144,000 95,400 89,500 102,000 92,700 88,600
27 91,700 122,000 174,000 215,000 210,000 212,000 143,000 96,300 89,700 100,000 93,800 89,600
28 92,100 124,000 174,000 217,000 213,000 210,000 142,000 99,700 90,200 100,000 96,200 91,500
29 90,800 115,000 174,000 221,000 214,000 208,000 140,000 101,000 90,500 101,000 94,800 93,900
30 92,800   176,000 223,000 214,000 206,000 139,000 101,000 89,000 102,000 94,400 95,200
31 93,300   178,000   212,000   137,000 102,000   102,000   96,900