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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 07196500 Illinois River near Tahlequah, OK


Cherokee County, Oklahoma
Hydrologic Unit Code 11110103
Latitude  35°55'31.97", Longitude  94°55'18.13" NAD83
Drainage area 950  square miles
Contributing drainage area 950  square miles
Gage datum 665.08 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 1935-10-01 -> 2024-09-30)

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
1 974 1,090 1,110 1,570 2,180 1,080 804 422 256 955 1,040 993
2 1,130 1,040 1,130 1,390 1,970 1,100 780 449 270 876 924 855
3 961 1,020 1,310 1,290 2,050 1,170 739 413 316 562 826 766
4 900 852 1,490 1,760 2,330 1,070 808 358 338 522 1,030 873
5 1,230 845 1,280 1,610 2,240 1,090 642 371 382 515 1,140 881
6 1,270 815 1,230 1,380 2,440 1,080 567 372 325 487 1,010 790
7 968 852 1,190 1,330 1,830 1,170 521 394 289 780 886 774
8 869 887 1,120 1,210 1,930 1,400 539 350 270 568 1,070 696
9 889 913 1,160 1,490 1,700 1,610 574 433 265 586 927 641
10 878 928 1,160 1,440 2,650 1,350 636 443 321 769 775 797
11 934 947 1,320 1,610 3,360 1,290 600 424 356 648 751 927
12 965 833 1,490 1,560 2,110 1,290 541 438 283 601 650 947
13 909 892 1,380 1,550 1,630 1,120 723 469 267 493 605 919
14 1,140 995 1,350 1,610 1,430 1,090 759 452 320 562 637 1,020
15 1,200 1,090 1,610 2,110 1,360 1,030 651 851 483 577 711 1,150
16 976 1,280 1,570 1,890 1,450 1,060 535 675 439 569 610 1,180
17 825 1,410 1,390 1,540 1,520 1,130 535 415 389 549 668 1,090
18 784 1,550 1,350 1,480 1,540 1,110 492 398 375 488 852 1,090
19 842 1,410 1,910 1,700 1,500 1,050 471 384 362 443 933 993
20 890 1,230 2,790 1,770 1,680 1,030 437 347 501 421 998 891
21 845 1,510 2,090 1,810 1,770 942 415 326 492 422 785 999
22 802 1,480 1,650 1,750 1,520 1,140 418 298 423 461 748 1,220
23 810 1,280 1,440 1,790 1,370 1,040 478 294 417 420 824 922
24 755 1,500 1,470 1,930 1,760 979 551 298 436 413 803 744
25 787 1,730 1,800 2,350 1,990 902 441 297 469 512 1,120 740
26 849 1,280 1,720 2,520 2,030 791 658 269 472 554 1,310 873
27 783 1,160 1,480 1,960 1,530 761 528 271 581 607 920 1,290
28 761 1,100 1,570 1,590 1,380 755 415 270 597 677 939 2,280
29 790 773 1,640 2,000 1,330 850 424 267 459 639 892 1,520
30 967   1,730 2,370 1,230 873 415 268 649 663 862 986
31 1,210   1,610   1,150   421 258   1,070   923