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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 403.32 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 1986-10-01 -> 2024-09-30)

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 96,000 89,700 121,000 178,000 226,000 209,000 199,000 135,000 99,800 88,700 99,700 94,200
2 93,600 88,800 125,000 179,000 225,000 210,000 198,000 130,000 96,600 90,700 100,000 93,100
3 92,500 89,400 125,000 181,000 225,000 211,000 197,000 128,000 93,500 92,900 103,000 94,000
4 94,200 90,300 124,000 186,000 225,000 210,000 195,000 125,000 91,300 94,700 104,000 95,400
5 95,500 92,600 125,000 187,000 227,000 209,000 189,000 120,000 91,500 96,900 104,000 93,500
6 94,600 93,200 130,000 186,000 229,000 206,000 187,000 117,000 89,300 94,600 101,000 93,100
7 91,600 91,900 132,000 186,000 229,000 205,000 186,000 113,000 84,700 94,500 98,600 91,300
8 92,300 91,500 130,000 187,000 228,000 202,000 184,000 110,000 82,100 96,000 97,100 90,600
9 91,800 92,000 133,000 188,000 227,000 198,000 182,000 107,000 81,800 97,500 95,200 87,200
10 89,800 94,200 139,000 192,000 226,000 197,000 182,000 104,000 84,300 97,600 94,800 85,300
11 92,000 94,200 145,000 196,000 225,000 197,000 178,000 102,000 87,700 96,900 95,400 86,400
12 91,200 94,900 149,000 199,000 225,000 198,000 176,000 101,000 86,900 96,900 96,200 85,100
13 90,700 95,500 152,000 200,000 224,000 197,000 173,000 98,300 86,200 98,000 95,100 83,800
14 89,900 97,200 155,000 202,000 223,000 198,000 168,000 95,400 89,100 99,300 95,500 85,100
15 87,700 93,700 159,000 201,000 222,000 198,000 164,000 94,200 90,800 102,000 94,400 84,400
16 87,600 90,500 162,000 200,000 222,000 198,000 163,000 92,300 93,400 101,000 92,800 86,100
17 85,800 92,700 162,000 202,000 224,000 197,000 163,000 92,200 93,100 101,000 93,100 88,000
18 84,500 95,000 166,000 202,000 225,000 198,000 158,000 91,600 91,700 101,000 93,600 87,800
19 82,100 95,400 169,000 206,000 225,000 196,000 153,000 91,300 90,600 100,000 93,200 88,100
20 81,200 96,300 173,000 206,000 223,000 196,000 151,000 90,000 90,900 102,000 92,600 86,000
21 81,700 102,000 171,000 208,000 222,000 196,000 149,000 88,800 90,500 101,000 92,500 87,800
22 82,100 107,000 166,000 209,000 219,000 194,000 148,000 88,200 87,800 99,400 92,400 87,800
23 85,200 113,000 163,000 212,000 214,000 195,000 146,000 88,800 89,100 99,100 89,800 86,700
24 86,700 116,000 165,000 213,000 208,000 197,000 146,000 91,100 87,500 99,400 89,500 87,500
25 88,200 118,000 167,000 213,000 206,000 200,000 146,000 92,100 86,600 101,000 90,800 87,200
26 89,900 120,000 171,000 213,000 208,000 205,000 145,000 92,700 86,900 99,500 90,500 86,400
27 90,300 120,000 173,000 215,000 210,000 206,000 144,000 93,600 87,200 97,700 91,400 87,400
28 91,000 121,000 173,000 219,000 213,000 204,000 142,000 96,600 88,000 97,700 93,500 89,400
29 90,000 110,000 172,000 222,000 213,000 203,000 138,000 98,000 88,300 98,100 92,400 92,100
30 91,800   173,000 226,000 213,000 200,000 138,000 98,200 86,600 99,400 92,100 93,200
31 91,900   177,000   212,000   136,000 99,000   99,000   94,600