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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 32 - 33 years of record in, ft3/s   (Calculation Period 1986-10-01 -> 2019-09-30)

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 93,300 88,900 119,000 166,000 219,000 200,000 198,000 134,000 105,000 90,100 92,900 92,500
2 89,200 87,900 121,000 167,000 218,000 200,000 197,000 129,000 101,000 88,400 93,700 91,100
3 88,200 87,700 122,000 170,000 218,000 200,000 196,000 127,000 97,100 90,200 97,400 91,700
4 91,000 87,900 121,000 172,000 218,000 200,000 194,000 125,000 94,400 92,300 98,800 93,500
5 92,900 87,700 122,000 174,000 219,000 199,000 190,000 121,000 94,200 94,700 98,500 90,500
6 91,300 87,800 129,000 174,000 221,000 197,000 188,000 119,000 91,800 91,200 95,600 89,400
7 88,400 86,400 131,000 174,000 221,000 196,000 185,000 117,000 86,500 91,200 92,700 88,400
8 88,400 86,300 129,000 175,000 221,000 194,000 183,000 113,000 84,000 92,300 91,100 88,700
9 88,900 87,000 132,000 177,000 221,000 191,000 180,000 108,000 83,400 93,200 89,200 85,000
10 86,500 89,100 137,000 182,000 218,000 190,000 179,000 105,000 86,900 92,500 89,600 83,500
11 87,200 87,900 143,000 187,000 216,000 190,000 174,000 104,000 90,600 90,700 91,200 85,200
12 86,000 88,700 147,000 190,000 215,000 191,000 173,000 102,000 90,300 90,000 91,700 83,400
13 85,100 91,600 150,000 191,000 216,000 191,000 169,000 98,000 88,500 91,100 90,800 81,100
14 85,200 94,300 154,000 192,000 216,000 193,000 163,000 95,400 91,300 91,600 90,900 83,000
15 84,000 90,100 156,000 192,000 215,000 194,000 161,000 95,500 93,700 93,700 89,500 83,100
16 84,700 87,400 159,000 192,000 216,000 195,000 160,000 93,500 95,500 92,500 87,900 85,900
17 83,400 89,800 160,000 196,000 217,000 194,000 158,000 93,200 95,200 93,000 88,200 87,900
18 82,400 91,200 162,000 196,000 216,000 196,000 151,000 92,900 93,900 92,400 89,800 88,400
19 78,600 92,000 164,000 199,000 216,000 195,000 147,000 92,700 93,000 92,800 89,500 88,600
20 78,100 93,800 167,000 201,000 215,000 195,000 146,000 91,400 92,800 94,800 88,800 86,500
21 80,300 101,000 164,000 204,000 215,000 196,000 146,000 90,900 92,700 94,500 89,100 88,500
22 81,500 107,000 159,000 206,000 213,000 195,000 146,000 90,800 89,900 92,500 89,600 87,600
23 83,700 113,000 156,000 209,000 208,000 196,000 145,000 91,600 91,300 92,500 87,200 87,300
24 84,800 116,000 157,000 210,000 202,000 200,000 146,000 93,400 89,400 92,500 87,900 88,700
25 87,400 118,000 158,000 209,000 199,000 202,000 146,000 96,200 89,000 92,300 89,600 88,900
26 89,900 119,000 160,000 208,000 201,000 205,000 144,000 96,700 89,300 91,400 89,400 88,500
27 90,100 119,000 162,000 210,000 203,000 206,000 143,000 96,700 89,200 89,800 90,500 89,700
28 90,400 121,000 162,000 213,000 205,000 205,000 143,000 101,000 89,200 90,000 93,400 92,000
29 89,000 110,000 162,000 217,000 206,000 204,000 141,000 104,000 89,000 90,100 92,200 93,700
30 91,900   163,000 219,000 205,000 201,000 139,000 103,000 87,200 91,800 91,800 94,100
31 91,700   166,000   203,000   136,000 104,000   91,900   94,300