Warning: Javascript must be enabled to use all the features on this page!


Page Loading - Please Wait...

Click to hideNews Bulletins

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 12370000 Swan River near Bigfork, MT


Lake County, Montana
Hydrologic Unit Code 17010211
Latitude  48°01'27.23", Longitude 113°58'43.75" NAD83
Drainage area 672  square miles
Gage datum 3,062.6 feet above NGVD29
Output formats
HTML table of all data
Tab-separated data
Reselect output format

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 1921-10-01 -> 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
1 511 480 519 985 2,040 3,490 2,560 910 559 503 578 596
2 505 487 519 1,020 2,080 3,520 2,500 886 555 503 579 593
3 499 492 522 1,050 2,110 3,540 2,430 865 550 503 580 595
4 497 490 526 1,080 2,140 3,580 2,360 845 545 503 584 599
5 494 487 529 1,100 2,200 3,630 2,290 824 539 503 589 598
6 492 485 532 1,140 2,260 3,640 2,220 804 534 504 595 592
7 491 484 535 1,180 2,330 3,650 2,150 783 530 501 601 585
8 494 483 538 1,220 2,390 3,650 2,070 766 528 502 604 577
9 497 485 542 1,260 2,430 3,640 1,990 746 528 504 611 566
10 499 493 547 1,290 2,460 3,600 1,930 729 525 504 610 557
11 499 501 553 1,330 2,490 3,540 1,860 713 522 507 610 555
12 497 507 560 1,360 2,520 3,460 1,790 698 520 512 614 557
13 495 510 572 1,390 2,560 3,400 1,720 686 518 518 618 558
14 494 510 585 1,440 2,620 3,370 1,660 673 514 524 622 555
15 495 509 599 1,500 2,700 3,360 1,610 667 513 526 622 551
16 497 508 621 1,530 2,770 3,340 1,560 660 513 532 617 548
17 500 508 654 1,570 2,850 3,350 1,500 651 513 536 610 545
18 508 508 680 1,610 2,950 3,340 1,450 640 516 543 603 539
19 508 508 699 1,650 3,030 3,290 1,390 631 518 549 599 532
20 507 510 717 1,690 3,090 3,250 1,350 619 523 554 592 529
21 503 514 729 1,750 3,140 3,180 1,300 613 526 558 587 527
22 500 519 741 1,800 3,190 3,130 1,260 605 527 565 586 529
23 499 523 752 1,830 3,260 3,080 1,210 602 526 570 583 540
24 498 522 772 1,860 3,310 3,040 1,170 597 524 572 586 556
25 497 518 790 1,900 3,350 3,000 1,130 593 520 570 600 559
26 495 515 808 1,940 3,400 2,940 1,090 590 517 573 615 551
27 491 515 829 1,960 3,460 2,860 1,050 585 516 577 620 546
28 487 515 854 1,980 3,500 2,780 1,020 581 513 579 614 542
29 482 509 885 1,990 3,500 2,690 987 574 509 579 606 535
30 478   915 2,010 3,490 2,620 960 567 507 578 599 527
31 477   948   3,490   932 563   576   521