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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 1,170 1,510 763 770 321 214 243 599 929
2 612 525 566 792 1,400 796 538 294 240 234 461 600
3 584 497 916 783 1,540 677 942 282 284 270 427 499
4 973 630 919 933 1,680 657 623 312 424 240 458 469
5 1,550 636 787 1,310 3,040 699 533 258 283 294 659 470
6 936 604 655 1,060 1,620 646 471 266 248 1,040 451 434
7 687 726 588 780 1,220 1,240 467 261 226 684 1,010 462
8 751 654 730 1,120 1,020 844 578 390 221 336 828 437
9 631 698 784 828 1,090 684 665 415 329 910 762 439
10 568 586 812 1,320 1,400 666 760 348 315 705 513 435
11 903 666 739 975 1,380 601 539 319 252 769 444 435
12 714 688 651 828 1,050 551 435 285 228 473 406 403
13 966 730 815 1,110 1,040 553 850 329 224 531 364 545
14 878 638 1,020 921 945 534 573 559 427 576 357 742
15 689 776 973 742 968 588 472 394 400 422 353 654
16 556 725 874 684 1,000 546 627 310 272 358 368 710
17 505 993 944 637 975 758 516 406 267 319 482 992
18 697 748 1,120 802 845 840 645 421 341 290 549 1,070
19 655 590 1,960 1,070 755 977 409 368 276 274 431 662
20 528 629 1,920 1,040 1,290 646 339 346 259 280 370 550
21 518 1,210 1,200 970 1,150 1,090 327 307 255 296 350 579
22 504 788 1,130 1,390 1,060 943 425 298 354 294 436 580
23 522 701 977 1,510 1,030 755 367 325 446 300 394 483
24 494 1,520 1,040 2,610 1,930 857 326 318 494 379 608 509
25 594 1,160 1,210 2,860 1,550 642 365 257 387 506 817 543
26 616 770 1,180 2,520 1,700 525 323 256 557 404 535 494
27 515 749 1,060 1,410 1,260 555 314 261 743 418 539 2,180
28 558 747 1,120 1,830 1,250 680 302 250 325 450 657 1,980
29 548 371 1,030 2,280 927 938 296 226 284 553 588 726
30 621   1,000 3,110 977 784 348 242 253 806 1,080 612
31 621   1,080   812   397 222   553   639