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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 -> 2022-09-30)

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
1 707 432 528 1,110 1,500 746 477 322 208 199 566 851
2 565 412 466 716 1,350 754 400 275 241 191 436 577
3 550 400 575 711 1,380 661 883 343 290 237 373 488
4 884 553 651 894 1,510 640 516 350 429 204 360 453
5 988 522 583 819 1,100 655 438 270 279 223 341 429
6 631 554 487 676 1,100 546 413 304 254 1,140 354 401
7 531 569 452 642 823 1,020 438 291 235 643 668 441
8 486 508 437 1,160 835 689 626 527 230 298 617 377
9 460 459 578 680 907 584 668 379 340 970 599 357
10 456 440 615 1,480 1,550 564 834 381 303 593 356 424
11 957 557 551 926 1,160 499 461 346 263 749 339 493
12 654 599 587 720 941 476 372 308 246 402 327 579
13 1,010 663 557 865 872 477 810 305 219 492 297 573
14 880 559 834 714 921 440 449 327 485 485 281 723
15 669 515 779 636 982 410 366 307 395 404 284 572
16 533 489 731 578 1,050 441 570 275 391 346 330 460
17 478 784 718 524 973 470 452 385 461 307 389 410
18 542 551 1,080 865 776 430 435 340 395 281 693 388
19 547 467 2,510 831 747 1,240 344 330 284 325 943 364
20 475 457 1,350 716 1,190 536 294 296 272 295 566 360
21 480 719 1,030 775 1,090 413 286 272 254 296 366 445
22 468 593 959 1,360 1,020 381 403 286 369 295 473 416
23 466 550 796 1,310 1,030 714 311 331 464 328 407 379
24 430 1,220 778 2,610 2,210 734 292 306 413 437 372 354
25 559 841 947 2,910 1,720 428 352 258 319 504 376 338
26 546 561 914 2,700 1,350 382 289 248 350 373 364 385
27 453 509 1,020 1,320 951 484 289 260 264 403 464 2,680
28 529 598 1,070 1,900 995 376 350 251 232 445 676 2,370
29 465 379 1,010 2,500 743 363 283 227 262 542 474 926
30 521   962 3,500 905 393 314 220 1,250 803 944 661
31 453   902   703   373 212   546   682