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USGS Daily Statistics for Montana

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Questions or concerns about USGS data and data products in Montana and Wyoming can be directed to the Wyoming-Montana Water Science Center Data Management Section.


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 12331800 Clark Fork near Drummond MT


Granite County, Montana
Hydrologic Unit Code 17010202
Latitude  46°42'42.89", Longitude 113°19'50.81" NAD83
Drainage area 2,516  square miles
Gage datum 3,810 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 1992-10-01 -> 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
1 519 590 566 739 1,050 1,700 1,130 408 359 514 625 576
2 515 584 569 745 1,040 1,730 1,120 399 363 525 625 579
3 498 537 568 742 1,030 1,720 1,070 388 359 532 632 579
4 499 527 571 740 1,040 1,760 1,060 374 359 544 635 561
5 494 532 575 774 1,060 1,790 1,040 371 363 555 636 546
6 489 527 588 801 1,080 1,800 978 374 370 566 634 529
7 493 547 610 812 1,110 1,820 931 373 377 571 630 521
8 512 637 626 851 1,150 1,830 892 376 388 575 632 516
9 526 777 637 871 1,140 1,860 856 363 407 581 633 512
10 515 694 687 885 1,140 1,840 822 356 414 586 627 513
11 505 586 724 899 1,160 1,860 807 346 413 594 621 525
12 481 551 719 900 1,180 1,810 785 343 410 603 615 537
13 477 550 764 875 1,170 1,750 761 341 414 608 614 546
14 494 558 770 870 1,170 1,780 746 341 414 618 617 533
15 513 562 728 872 1,180 1,690 720 338 419 624 610 531
16 504 577 739 851 1,230 1,650 692 338 428 627 609 521
17 516 569 744 843 1,300 1,690 658 341 434 633 611 518
18 527 566 714 848 1,400 1,760 636 340 439 632 606 497
19 529 564 732 860 1,430 1,760 610 336 447 633 604 496
20 525 569 752 878 1,460 1,750 593 331 460 639 601 496
21 514 557 736 911 1,490 1,680 571 334 468 641 599 505
22 504 551 738 942 1,490 1,590 548 348 472 636 590 493
23 501 555 773 974 1,510 1,520 531 351 478 633 581 477
24 495 525 765 1,000 1,530 1,450 511 355 483 632 575 472
25 508 523 747 1,030 1,590 1,370 492 353 482 625 574 471
26 512 525 740 1,030 1,630 1,320 472 351 482 624 574 471
27 531 515 746 1,030 1,650 1,290 465 355 486 624 578 467
28 509 522 728 1,020 1,650 1,230 462 355 487 627 580 479
29 486 609 732 1,020 1,670 1,190 446 357 491 626 577 490
30 493   713 1,040 1,680 1,170 430 357 498 622 573 491
31 499   720   1,680   421 354   621   491