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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 12340000 Blackfoot River near Bonner MT


Missoula County, Montana
Hydrologic Unit Code 17010203
Latitude  46°53'57.88", Longitude 113°45'22.75" NAD83
Drainage area 2,287  square miles
Gage datum 3,344.76 feet above NGVD29
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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 1897-10-01 -> 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
1 539 565 643 1,200 3,310 5,930 2,990 1,000 687 626 653 644
2 530 574 653 1,250 3,400 5,900 2,880 985 685 637 655 655
3 526 575 643 1,270 3,510 5,960 2,770 963 680 631 653 657
4 526 565 636 1,310 3,640 6,030 2,680 942 671 630 658 662
5 530 570 635 1,350 3,810 6,020 2,590 924 664 623 662 655
6 540 575 642 1,430 3,950 5,950 2,480 909 662 623 666 635
7 561 571 643 1,520 4,140 5,830 2,370 894 658 624 666 616
8 566 582 656 1,580 4,280 5,670 2,260 878 658 624 683 612
9 565 609 665 1,640 4,360 5,560 2,170 860 657 629 679 605
10 559 598 675 1,710 4,460 5,440 2,090 847 658 626 671 605
11 548 600 699 1,810 4,560 5,260 2,000 833 655 626 664 608
12 540 599 722 1,880 4,650 5,110 1,920 822 652 632 654 609
13 544 590 736 1,960 4,790 5,020 1,850 810 651 633 654 609
14 550 587 740 2,010 4,870 4,980 1,790 801 651 636 658 612
15 555 584 748 2,060 4,970 4,840 1,720 786 651 635 658 605
16 574 592 784 2,100 5,130 4,760 1,650 778 649 639 652 594
17 577 598 826 2,140 5,330 4,730 1,580 771 648 642 651 583
18 576 598 842 2,180 5,500 4,640 1,520 762 648 640 647 577
19 567 599 862 2,250 5,610 4,530 1,460 751 648 638 644 568
20 560 613 871 2,380 5,680 4,410 1,420 744 647 639 639 569
21 559 624 882 2,520 5,780 4,300 1,370 740 647 638 637 565
22 559 618 915 2,630 5,820 4,140 1,320 736 644 640 637 566
23 557 611 949 2,760 5,850 3,980 1,270 736 642 640 632 569
24 552 612 973 2,860 5,920 3,840 1,220 732 640 644 645 575
25 555 610 980 2,950 5,980 3,690 1,190 725 635 642 660 571
26 546 605 990 3,030 6,050 3,550 1,150 719 634 651 661 572
27 546 613 1,010 3,090 6,090 3,410 1,120 712 633 651 652 573
28 539 625 1,050 3,130 6,080 3,250 1,090 707 635 654 642 563
29 532 625 1,080 3,160 6,030 3,140 1,070 697 632 650 634 550
30 533   1,110 3,240 6,030 3,070 1,040 691 629 649 638 550
31 556   1,150   5,980   1,020 688   652   552