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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
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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 -> 2021-09-30)

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
1 603 414 529 1,130 1,440 672 474 321 206 191 567 898
2 499 397 466 721 1,300 680 381 272 241 184 422 599
3 512 387 581 718 1,350 620 898 344 292 225 357 486
4 875 549 661 911 1,320 614 518 352 438 200 345 448
5 992 518 591 833 981 639 439 268 281 221 330 428
6 623 553 490 685 1,050 530 413 304 255 1,180 348 400
7 499 569 454 650 780 1,010 440 291 235 660 693 445
8 446 507 439 1,190 806 635 637 538 230 300 640 373
9 432 457 587 690 891 562 682 384 345 1,000 622 354
10 435 438 627 1,530 1,580 548 856 386 307 609 358 426
11 965 560 560 947 1,160 486 465 350 265 771 335 499
12 651 606 597 733 929 466 373 311 247 410 323 586
13 1,030 674 548 886 868 469 832 307 219 503 291 579
14 892 566 825 715 925 432 455 318 498 445 275 726
15 673 520 711 627 992 403 369 306 403 365 267 568
16 533 493 699 576 1,070 436 576 274 399 325 326 454
17 476 802 698 519 976 468 427 389 473 299 392 404
18 546 559 1,080 877 763 428 329 341 404 276 726 383
19 552 471 2,590 845 739 1,280 296 331 287 324 1,000 358
20 477 461 1,370 726 1,210 541 270 297 274 293 590 355
21 483 734 1,040 789 1,100 402 271 271 240 292 372 445
22 471 594 974 1,400 1,000 362 397 286 367 293 476 416
23 469 548 801 1,350 1,020 722 303 334 472 328 404 378
24 433 1,250 781 2,610 2,270 745 285 308 420 442 371 353
25 455 857 936 2,950 1,760 427 333 258 323 512 361 337
26 462 565 846 2,780 1,350 380 276 248 356 377 348 387
27 406 509 1,000 1,340 948 487 282 260 266 407 466 2,790
28 502 603 1,070 1,040 810 365 348 251 233 371 702 2,460
29 443 379 1,010 1,830 677 357 279 226 264 502 484 953
30 506   968 3,460 878 390 312 219 1,300 800 998 669
31 429   909   681   375 211   542   676