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USGS Daily Statistics for Oklahoma

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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 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
1 974 1,090 1,100 1,550 2,190 1,080 799 420 256 946 1,030 987
2 1,130 1,040 1,120 1,390 1,980 1,100 775 447 270 868 918 850
3 961 1,020 1,300 1,280 2,060 1,170 735 411 316 558 821 762
4 900 852 1,480 1,750 2,320 1,070 802 357 337 519 1,020 868
5 1,230 845 1,270 1,600 2,240 1,090 639 369 380 511 1,160 875
6 1,270 815 1,220 1,370 2,450 1,080 567 371 324 484 1,100 785
7 968 852 1,180 1,320 1,860 1,180 526 392 289 773 914 769
8 869 887 1,110 1,210 1,990 1,390 540 349 269 564 1,070 693
9 889 913 1,160 1,480 1,740 1,600 572 431 265 581 931 637
10 878 928 1,150 1,430 2,670 1,340 633 441 320 762 797 797
11 934 947 1,310 1,600 3,350 1,280 599 422 355 642 772 927
12 965 833 1,480 1,550 2,120 1,280 540 436 282 597 661 947
13 909 892 1,370 1,540 1,630 1,110 719 467 267 490 611 919
14 1,140 995 1,350 1,600 1,440 1,080 755 451 319 558 640 1,020
15 1,200 1,090 1,600 2,090 1,360 1,020 648 845 479 572 711 1,150
16 976 1,280 1,560 1,880 1,450 1,050 533 671 437 564 611 1,180
17 825 1,410 1,390 1,530 1,520 1,120 532 417 387 545 668 1,090
18 784 1,550 1,340 1,470 1,530 1,110 490 399 373 485 850 1,090
19 842 1,410 1,890 1,680 1,500 1,040 469 387 360 440 931 993
20 890 1,230 2,760 1,750 1,670 1,020 436 349 498 418 1,010 891
21 845 1,510 2,070 1,800 1,760 936 415 329 489 419 793 999
22 802 1,470 1,640 1,740 1,510 1,130 418 300 420 458 752 1,220
23 810 1,270 1,430 1,770 1,370 1,030 481 295 414 417 825 922
24 755 1,490 1,460 1,910 1,760 972 552 299 433 410 802 744
25 787 1,720 1,790 2,330 1,980 896 442 297 466 509 1,120 740
26 849 1,270 1,710 2,500 2,020 787 656 269 469 550 1,300 873
27 783 1,160 1,490 1,940 1,540 756 526 271 577 602 916 1,290
28 761 1,090 1,570 1,600 1,380 752 414 269 592 671 934 2,280
29 790 763 1,640 2,030 1,330 845 423 267 456 634 888 1,520
30 967   1,720 2,390 1,230 867 414 268 644 658 858 986
31 1,210   1,600   1,150   420 258   1,060   923