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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 07195400 Illinois River at Hwy. 16 near Siloam Springs AR


Benton County, Arkansas
Hydrologic Unit Code 11110103
Latitude  36°08'41", Longitude  94°29'41" NAD83
Drainage area 509  square miles
Gage datum 933.07 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 1978-10-01 -> 2023-09-30)

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
1 734 427 544 1,130 1,490 743 471 330 211 198 553 837
2 628 409 480 740 1,360 749 397 282 248 190 428 571
3 576 398 580 727 1,590 659 860 344 313 234 367 485
4 884 544 650 895 1,690 637 514 351 428 203 357 449
5 979 514 582 827 3,040 651 435 277 281 221 375 425
6 633 545 490 696 1,500 548 409 306 256 1,100 362 399
7 534 562 465 654 989 1,000 433 292 237 624 658 437
8 489 508 448 1,140 951 736 613 518 232 293 606 408
9 463 466 579 681 988 668 652 377 336 938 588 398
10 457 447 611 1,440 1,590 650 811 381 300 576 354 476
11 935 556 549 930 1,190 555 453 346 261 725 337 547
12 644 595 583 747 978 502 368 308 245 393 327 594
13 985 654 553 1,100 894 492 788 304 219 480 296 600
14 860 553 817 861 933 451 442 325 474 473 281 802
15 658 510 764 698 988 418 362 306 388 395 283 604
16 529 484 718 640 1,060 445 558 275 383 340 328 483
17 475 917 704 585 972 472 444 402 451 303 384 485
18 537 630 1,060 889 782 433 428 354 387 278 675 897
19 542 503 2,430 845 751 1,210 341 334 280 320 914 501
20 472 478 1,310 729 1,170 533 293 298 268 290 552 436
21 476 721 1,000 785 1,080 414 285 290 251 291 360 489
22 464 635 1,030 1,330 1,020 383 397 300 361 291 462 445
23 461 583 844 1,280 1,020 701 308 335 452 322 399 401
24 427 1,210 801 2,540 2,140 720 290 308 404 427 391 372
25 550 840 950 3,160 1,720 426 347 261 313 530 404 353
26 538 573 910 2,720 1,370 382 287 251 343 398 374 395
27 448 530 1,010 1,350 973 479 287 261 261 404 520 2,590
28 521 615 1,060 1,890 999 375 345 252 230 441 693 2,290
29 459 379 994 2,470 750 362 287 229 259 532 485 911
30 512   1,040 3,410 900 391 346 258 1,210 782 930 656
31 447   981   704   402 219   535   674