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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 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 -> 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
1 971 1,090 1,100 1,550 2,190 1,080 799 420 256 946 1,030 987
2 1,130 1,040 1,110 1,390 1,980 1,100 775 447 270 868 918 850
3 958 1,020 1,290 1,280 2,060 1,170 735 411 316 558 821 762
4 897 849 1,470 1,750 2,320 1,070 802 357 337 519 1,020 868
5 1,220 841 1,270 1,600 2,240 1,090 639 369 380 511 1,160 875
6 1,260 811 1,240 1,370 2,450 1,080 567 371 324 484 1,100 785
7 963 848 1,190 1,320 1,860 1,180 526 392 289 773 914 769
8 865 882 1,120 1,210 1,990 1,390 540 349 269 564 1,070 693
9 885 908 1,160 1,480 1,740 1,600 572 431 265 581 931 637
10 874 922 1,150 1,430 2,670 1,340 633 441 320 762 797 792
11 928 942 1,310 1,600 3,350 1,280 599 422 355 642 772 921
12 959 829 1,480 1,550 2,120 1,280 540 436 282 597 661 940
13 904 890 1,370 1,540 1,630 1,110 719 467 267 490 611 913
14 1,130 996 1,350 1,600 1,440 1,080 755 451 319 558 640 1,010
15 1,200 1,090 1,600 2,090 1,360 1,020 648 845 479 572 711 1,140
16 971 1,270 1,560 1,880 1,450 1,050 533 671 437 564 611 1,170
17 821 1,410 1,390 1,530 1,520 1,120 532 417 387 545 668 1,080
18 780 1,540 1,340 1,470 1,530 1,110 490 399 373 485 850 1,080
19 838 1,400 1,890 1,680 1,500 1,040 469 387 360 440 931 991
20 885 1,220 2,760 1,750 1,670 1,020 436 349 498 418 1,010 891
21 840 1,500 2,070 1,800 1,760 936 415 329 489 419 793 996
22 798 1,460 1,640 1,740 1,510 1,130 418 300 420 458 752 1,210
23 806 1,260 1,430 1,770 1,370 1,030 481 295 414 417 825 918
24 751 1,480 1,460 1,910 1,760 972 552 299 433 410 802 742
25 783 1,710 1,790 2,330 1,980 896 442 297 466 509 1,120 740
26 844 1,270 1,710 2,500 2,020 787 656 269 469 550 1,300 881
27 778 1,150 1,490 1,940 1,540 756 526 271 577 602 916 1,290
28 756 1,090 1,570 1,600 1,380 752 414 269 592 671 934 2,260
29 785 763 1,640 2,030 1,330 845 423 267 456 634 888 1,520
30 961   1,720 2,390 1,230 867 414 268 644 658 858 985
31 1,200   1,600   1,150   420 258   1,060   922