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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 1,140 1,040 1,130 1,390 1,970 1,100 780 449 270 876 924 855
3 963 1,020 1,310 1,290 2,050 1,170 739 413 316 562 826 766
4 902 849 1,490 1,760 2,330 1,070 808 358 338 522 1,030 873
5 1,240 837 1,280 1,610 2,240 1,090 642 371 382 515 1,140 881
6 1,270 798 1,230 1,380 2,440 1,080 567 372 325 487 1,010 790
7 972 839 1,190 1,330 1,830 1,170 521 394 289 780 886 774
8 871 878 1,120 1,210 1,930 1,400 539 350 270 568 1,070 696
9 891 907 1,160 1,490 1,700 1,610 574 433 265 586 927 641
10 877 923 1,160 1,440 2,650 1,350 636 443 321 769 775 797
11 931 945 1,320 1,610 3,360 1,290 600 424 356 648 751 927
12 963 830 1,490 1,560 2,110 1,290 541 438 283 601 650 947
13 908 890 1,380 1,550 1,630 1,120 723 469 267 493 605 919
14 1,140 994 1,350 1,610 1,430 1,090 759 452 320 562 637 1,020
15 1,210 1,090 1,610 2,110 1,360 1,030 651 851 483 577 711 1,150
16 978 1,280 1,570 1,890 1,450 1,060 535 675 439 569 610 1,180
17 825 1,420 1,390 1,540 1,520 1,130 535 415 389 549 668 1,090
18 784 1,560 1,350 1,480 1,540 1,110 492 398 375 488 852 1,090
19 843 1,420 1,910 1,700 1,500 1,050 471 384 362 443 933 993
20 892 1,230 2,790 1,770 1,680 1,030 437 347 501 421 998 891
21 847 1,520 2,090 1,810 1,770 942 415 326 492 422 785 1,010
22 804 1,480 1,650 1,750 1,520 1,140 418 298 423 461 748 1,230
23 811 1,280 1,440 1,790 1,370 1,040 478 294 417 420 824 927
24 741 1,500 1,470 1,930 1,760 979 551 298 436 413 803 747
25 772 1,730 1,800 2,350 1,990 902 441 297 469 512 1,120 734
26 838 1,280 1,720 2,520 2,030 791 658 269 472 554 1,310 840
27 770 1,160 1,480 1,960 1,530 761 528 271 581 607 920 1,270
28 750 1,100 1,570 1,590 1,380 755 415 270 597 677 939 2,280
29 778 773 1,640 2,000 1,330 850 424 267 459 639 892 1,520
30 960   1,730 2,370 1,230 873 415 268 649 663 862 982
31 1,210   1,610   1,150   421 258   1,070   921