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USGS Daily Statistics for the Nation

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 -> 2021-09-30)

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 98,800 90,600 123,000 179,000 224,000 211,000 203,000 136,000 103,000 92,300 102,000 97,300
2 96,000 89,800 125,000 179,000 224,000 212,000 202,000 130,000 99,600 94,600 103,000 96,300
3 94,900 90,100 125,000 182,000 225,000 212,000 201,000 128,000 95,500 96,900 105,000 97,200
4 97,300 91,100 124,000 184,000 225,000 212,000 199,000 126,000 93,100 99,000 106,000 98,800
5 98,500 92,400 124,000 185,000 227,000 211,000 195,000 123,000 93,200 101,000 106,000 96,500
6 97,000 93,100 129,000 184,000 229,000 209,000 192,000 120,000 90,900 98,600 103,000 95,900
7 94,500 91,700 131,000 184,000 228,000 208,000 190,000 117,000 86,100 98,700 101,000 94,400
8 94,400 91,600 130,000 185,000 228,000 206,000 187,000 114,000 84,000 100,000 99,000 94,300
9 94,100 92,400 133,000 187,000 228,000 203,000 184,000 110,000 83,600 102,000 97,000 90,200
10 91,700 94,500 140,000 191,000 226,000 202,000 183,000 107,000 86,500 102,000 97,200 88,100
11 93,900 94,000 147,000 196,000 223,000 201,000 178,000 105,000 90,400 101,000 98,300 89,500
12 93,300 94,200 150,000 198,000 222,000 203,000 176,000 103,000 90,100 101,000 98,900 87,600
13 92,500 95,900 154,000 199,000 223,000 202,000 172,000 98,500 88,900 102,000 97,700 85,700
14 91,700 97,500 158,000 200,000 222,000 203,000 167,000 95,800 92,300 103,000 97,900 87,100
15 89,400 93,400 162,000 200,000 221,000 204,000 164,000 95,300 94,300 105,000 96,100 86,500
16 89,600 90,300 165,000 200,000 222,000 204,000 163,000 93,400 96,400 104,000 94,700 88,200
17 88,100 92,300 166,000 203,000 223,000 203,000 162,000 93,000 96,600 105,000 94,700 90,000
18 86,700 94,300 170,000 204,000 223,000 204,000 156,000 93,000 95,200 104,000 95,900 90,300
19 83,400 95,100 174,000 207,000 222,000 203,000 151,000 92,400 93,700 105,000 95,400 89,900
20 82,700 96,100 177,000 208,000 221,000 202,000 150,000 91,600 93,800 106,000 94,500 87,500
21 83,400 102,000 175,000 210,000 221,000 203,000 149,000 91,500 93,700 106,000 94,700 89,500
22 83,500 107,000 171,000 212,000 219,000 201,000 149,000 90,800 91,200 104,000 94,700 89,700
23 86,200 113,000 168,000 215,000 215,000 203,000 147,000 91,700 92,400 104,000 92,300 88,800
24 87,700 116,000 169,000 215,000 210,000 206,000 148,000 93,900 90,600 104,000 92,200 90,200
25 90,200 119,000 170,000 215,000 207,000 208,000 148,000 96,000 90,200 103,000 93,700 89,900
26 91,800 121,000 172,000 214,000 209,000 210,000 146,000 96,800 90,700 102,000 93,800 89,400
27 91,700 122,000 174,000 216,000 211,000 211,000 145,000 97,200 90,800 100,000 94,800 90,300
28 92,100 124,000 174,000 219,000 214,000 209,000 144,000 101,000 91,000 100,000 97,400 91,600
29 90,800 115,000 174,000 222,000 215,000 208,000 141,000 103,000 91,300 100,000 96,100 94,100
30 92,800   176,000 224,000 215,000 206,000 140,000 102,000 89,900 101,000 95,600 95,700
31 93,300   178,000   214,000   138,000 103,000   101,000   97,500