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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 05591200 KASKASKIA RIVER AT COOKS MILLS, IL


Coles County, Illinois
Hydrologic Unit Code 07140201
Latitude  39°35'00.5", Longitude  88°24'49.7" NAD83
Drainage area 473  square miles
Gage datum 616.89 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 1970-10-01 -> 2026-09-30)

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
1 824 455 684 861 888 560 424 222 96 134 174 481
2 764 468 633 829 907 548 378 253 85 131 216 478
3 674 457 649 796 873 569 345 293 78 127 232 469
4 619 445 720 754 882 619 351 285 77 144 251 462
5 629 458 771 740 849 684 378 232 73 174 237 446
6 668 510 791 741 774 663 399 183 63 185 213 422
7 602 571 753 695 748 708 396 151 51 155 196 412
8 516 569 688 645 739 693 354 133 54 140 182 401
9 438 527 666 613 771 669 326 109 72 131 168 389
10 408 484 673 582 772 623 332 87 92 135 165 367
11 454 469 675 598 782 582 327 81 100 144 181 395
12 499 486 724 727 812 577 337 93 87 151 238 437
13 529 473 750 821 878 561 368 100 75 146 277 468
14 536 463 761 827 860 563 360 104 72 147 274 461
15 532 432 739 773 819 578 324 111 81 145 282 473
16 499 419 715 754 822 580 296 126 106 139 279 494
17 449 451 679 726 760 566 258 137 140 133 306 506
18 416 548 655 719 812 524 212 124 138 134 360 490
19 408 605 666 764 944 550 174 103 113 154 383 450
20 435 643 714 746 895 577 163 86 93 154 417 423
21 464 756 745 706 802 581 188 77 81 144 403 396
22 516 917 709 749 736 577 225 66 70 136 362 403
23 564 1,080 647 808 673 645 223 54 66 134 324 405
24 568 1,110 600 762 622 629 198 46 70 147 304 410
25 567 1,010 595 687 587 605 184 46 82 172 308 477
26 552 859 599 693 617 550 190 47 108 191 332 529
27 516 794 610 692 732 556 210 62 122 208 374 643
28 490 738 671 714 776 577 219 76 134 203 419 736
29 453 330 733 782 714 543 208 80 144 185 450 780
30 432   774 855 656 482 202 100 140 167 469 852
31 433   834   598   210 99   157   863