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USGS Daily Statistics for the Nation

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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 403.32 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 -> 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 95,500 88,700 120,000 176,000 226,000 206,000 198,000 138,000 101,000 87,500 98,200 93,500
2 93,100 88,000 123,000 177,000 225,000 207,000 198,000 133,000 97,400 89,500 99,100 92,400
3 92,300 88,800 124,000 179,000 224,000 208,000 196,000 130,000 93,400 91,500 102,000 93,100
4 93,900 89,600 123,000 184,000 225,000 208,000 193,000 128,000 91,500 93,300 103,000 94,300
5 95,100 91,600 123,000 186,000 226,000 208,000 188,000 123,000 91,600 95,400 104,000 92,200
6 94,300 92,500 128,000 185,000 228,000 206,000 186,000 120,000 89,200 93,100 102,000 91,600
7 90,600 91,200 131,000 186,000 227,000 203,000 185,000 116,000 85,100 93,100 99,100 89,900
8 90,900 90,800 130,000 185,000 226,000 199,000 184,000 113,000 82,800 94,600 97,300 89,200
9 90,900 91,200 132,000 188,000 225,000 196,000 182,000 109,000 82,300 96,000 95,200 86,000
10 89,000 93,400 138,000 192,000 224,000 194,000 182,000 106,000 83,800 96,200 95,200 84,400
11 91,200 93,300 144,000 196,000 223,000 195,000 178,000 105,000 87,200 95,400 95,900 85,700
12 90,400 94,000 147,000 198,000 223,000 196,000 176,000 103,000 86,600 95,200 96,100 84,400
13 89,900 94,400 150,000 199,000 222,000 194,000 174,000 99,700 85,900 96,300 94,600 83,100
14 88,900 96,200 154,000 200,000 220,000 195,000 169,000 96,100 88,400 97,500 95,000 84,100
15 86,600 92,700 157,000 198,000 218,000 196,000 165,000 95,700 89,500 99,800 93,700 83,500
16 86,500 89,600 160,000 197,000 218,000 196,000 165,000 94,900 92,300 98,900 92,100 85,200
17 85,000 91,800 160,000 199,000 220,000 194,000 165,000 94,900 91,900 99,200 92,400 87,400
18 83,900 94,100 164,000 200,000 221,000 195,000 159,000 93,900 90,600 99,000 92,900 87,400
19 81,500 94,600 167,000 203,000 221,000 194,000 154,000 92,900 89,700 98,800 92,400 87,700
20 80,100 95,700 171,000 203,000 223,000 194,000 151,000 91,500 90,000 100,000 91,800 85,300
21 80,700 102,000 169,000 207,000 220,000 194,000 151,000 90,500 89,700 99,700 91,800 87,100
22 81,100 106,000 165,000 209,000 216,000 193,000 150,000 90,200 87,300 97,700 91,900 87,100
23 84,000 112,000 161,000 212,000 211,000 193,000 148,000 91,200 88,700 97,400 89,400 86,000
24 85,500 115,000 164,000 211,000 205,000 196,000 147,000 93,600 87,200 97,700 89,100 86,700
25 87,100 117,000 166,000 212,000 204,000 198,000 145,000 94,400 85,900 99,000 90,500 86,200
26 88,800 118,000 169,000 212,000 206,000 203,000 145,000 95,100 86,200 97,900 90,200 85,600
27 89,200 118,000 171,000 214,000 208,000 205,000 146,000 95,900 86,500 96,300 91,000 86,600
28 89,800 120,000 172,000 217,000 211,000 204,000 144,000 98,700 87,300 96,200 93,000 88,600
29 88,900 110,000 170,000 221,000 211,000 203,000 141,000 100,000 87,700 96,500 91,800 91,300
30 90,700   171,000 225,000 211,000 200,000 140,000 99,800 85,800 97,800 91,500 92,400
31 90,800   175,000   209,000   138,000 100,000   97,400   93,900