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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 07195430 Illinois River South of Siloam Springs, AR


Benton County, Arkansas
Hydrologic Unit Code 11110103
Latitude  36°06'31", Longitude  94°32'00" NAD83
Drainage area 575  square miles
Gage datum 913.14 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 1994-10-01 -> 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
1 668 646 627 1,190 1,410 748 778 305 214 243 599 929
2 612 525 566 808 1,310 787 539 267 240 234 461 600
3 584 497 932 795 1,470 668 957 272 284 270 427 499
4 973 630 932 910 1,670 633 627 306 424 240 458 469
5 1,550 636 752 761 3,090 681 536 252 283 294 659 470
6 936 604 642 736 1,630 598 472 262 248 1,040 451 434
7 687 726 580 686 1,220 848 469 257 226 684 1,010 462
8 751 654 731 1,080 1,020 664 578 390 221 336 828 437
9 631 698 790 797 1,090 612 664 415 329 910 762 439
10 568 586 819 1,320 1,420 623 768 348 315 705 513 435
11 903 666 746 973 1,400 570 542 319 252 769 444 435
12 714 688 655 826 1,060 525 426 285 228 473 406 403
13 966 730 826 1,130 1,050 527 843 329 224 531 364 545
14 878 638 1,040 929 955 507 562 559 427 576 357 742
15 689 776 989 745 980 561 458 394 400 422 353 654
16 556 725 888 687 1,010 516 626 310 272 358 368 710
17 505 993 962 639 990 741 514 406 267 319 482 992
18 697 748 1,150 811 854 792 479 421 341 290 549 1,070
19 655 590 2,010 909 706 945 368 368 276 274 431 662
20 528 629 1,980 648 1,060 622 316 346 259 280 370 550
21 518 1,210 1,230 662 1,100 1,080 310 307 255 296 350 579
22 504 788 1,160 1,310 1,040 943 415 298 354 294 436 580
23 522 701 999 1,480 1,020 753 358 325 446 300 394 483
24 494 1,520 1,060 2,640 1,960 860 318 318 494 379 608 509
25 594 1,160 1,250 2,910 1,420 640 359 257 387 506 817 543
26 616 770 1,210 2,570 1,460 521 317 256 557 404 535 494
27 515 749 1,080 1,410 1,130 553 309 261 743 418 539 2,180
28 558 747 1,140 1,850 1,180 683 298 250 325 450 657 1,980
29 548 371 1,050 2,320 877 947 292 226 284 553 588 726
30 621   1,030 3,150 951 789 346 242 253 806 1,080 612
31 621   1,110   791   398 222   553   639