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USGS Surface-Water 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 07196090 Illinois River at Chewey, OK


Adair County, Oklahoma
Hydrologic Unit Code 11110103
Latitude  36°06'15", Longitude  94°46'57" NAD27
Drainage area 825  square miles
Contributing drainage area 825  square miles
Gage datum 800.91 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 2009-10-01 -> 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 1,110 702 944 1,370 3,370 1,350 511 483 310 280 678 1,140
2 1,190 647 808 1,160 2,690 1,320 510 403 317 282 581 871
3 957 614 997 1,090 2,580 1,100 569 374 356 278 521 698
4 1,170 722 1,180 1,090 3,230 1,110 580 470 348 269 506 647
5 1,180 967 932 1,060 5,720 1,240 541 387 299 315 974 633
6 868 845 821 981 3,910 1,080 542 361 278 818 838 597
7 762 758 762 904 2,260 1,450 548 365 269 2,340 991 551
8 742 887 821 881 1,900 1,370 893 490 268 628 1,280 527
9 694 1,080 997 811 1,920 1,160 893 758 285 491 1,260 594
10 740 872 1,150 778 2,290 962 1,240 589 422 485 915 556
11 1,640 786 1,290 887 2,490 989 855 471 328 1,220 706 644
12 1,450 832 1,040 946 1,830 791 623 420 295 964 636 553
13 1,140 960 1,000 1,320 1,630 717 688 419 275 647 567 783
14 918 835 1,260 1,550 1,440 690 930 665 267 886 517 1,380
15 812 801 1,790 1,200 1,290 736 666 588 287 715 492 1,150
16 741 819 1,320 1,030 1,550 738 727 476 298 601 467 997
17 703 899 1,540 968 1,330 728 829 487 280 494 475 894
18 829 957 1,300 1,380 1,340 741 804 690 290 435 742 1,740
19 994 744 1,640 1,620 1,140 1,310 660 521 314 400 566 1,290
20 916 684 3,050 1,010 1,580 1,390 509 532 336 387 514 900
21 744 1,040 1,800 933 2,260 777 452 445 351 452 485 876
22 683 927 1,770 2,160 2,060 683 498 414 339 461 613 1,010
23 720 916 1,460 1,530 1,670 1,160 625 402 360 438 712 813
24 747 1,870 1,550 2,110 4,390 1,800 470 429 385 519 601 743
25 861 2,210 1,770 5,390 3,740 834 418 375 623 1,060 621 836
26 1,160 1,030 1,630 6,220 3,040 711 414 341 489 796 619 874
27 905 911 1,740 3,130 2,260 766 388 348 495 743 677 3,720
28 800 996 2,330 2,830 2,060 672 407 372 357 706 1,160 6,650
29 758 558 1,590 5,550 1,730 584 401 327 330 916 946 2,100
30 767   1,620 7,440 1,940 534 391 319 302 935 1,030 1,170
31 762   1,670   1,650   535 334   874   969