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USGS Daily Statistics for Arkansas

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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 -> 2020-09-30)

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
1 595 382 522 1,090 1,450 643 476 312 202 191 553 898
2 487 368 456 681 1,320 657 379 266 235 184 422 599
3 502 361 577 681 1,370 598 916 343 293 227 357 427
4 885 417 663 866 1,330 556 515 353 446 201 345 398
5 1,010 417 589 799 954 592 429 266 282 223 330 385
6 623 462 485 650 1,040 499 405 304 256 1,230 348 362
7 494 512 449 619 771 1,010 438 287 237 682 693 414
8 440 461 433 1,190 761 622 646 543 232 306 640 343
9 426 418 589 669 862 547 690 387 351 1,040 622 324
10 399 388 629 1,550 1,600 535 864 391 310 629 358 402
11 438 518 555 946 1,170 472 463 351 266 799 335 482
12 495 546 592 706 925 453 369 301 249 421 323 575
13 960 578 543 763 845 458 852 304 220 518 291 569
14 845 506 628 660 914 421 457 318 512 458 275 724
15 629 472 529 585 913 391 368 307 413 374 267 560
16 492 452 616 540 863 428 586 275 409 332 326 438
17 430 782 641 487 879 459 430 395 486 305 392 377
18 421 530 956 867 695 420 329 346 414 281 726 361
19 467 443 2,100 836 694 1,320 295 336 292 330 1,000 338
20 416 436 843 712 1,200 540 268 300 279 297 590 338
21 434 726 903 780 1,090 396 269 273 243 296 372 434
22 428 582 871 1,420 953 354 359 289 375 297 476 404
23 427 534 712 1,340 968 732 288 340 485 334 404 365
24 391 1,270 688 2,680 2,310 757 277 313 431 448 371 340
25 420 856 864 3,020 1,770 425 331 261 329 526 361 324
26 431 553 792 2,850 1,070 376 273 249 364 383 348 378
27 374 497 968 1,350 804 488 281 261 270 365 466 2,890
28 476 596 1,040 1,040 671 361 342 252 232 331 702 2,550
29 397 315 983 1,830 596 353 274 227 265 311 484 932
30 466   945 3,560 834 388 300 220 1,350 729 998 651
31 394   857   643   362 210   512   667