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USGS Surface-Water 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 -> 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
1 541 567 643 1,200 3,310 5,970 3,010 1,010 691 629 656 647
2 532 575 653 1,250 3,400 5,950 2,900 991 688 640 658 657
3 527 577 643 1,270 3,510 6,000 2,790 969 683 634 656 660
4 527 568 636 1,310 3,640 6,080 2,700 948 674 632 661 665
5 531 573 635 1,350 3,810 6,060 2,610 929 666 626 665 658
6 542 579 642 1,430 3,950 5,990 2,490 914 665 626 668 638
7 563 574 643 1,520 4,140 5,870 2,380 899 661 627 669 617
8 568 585 656 1,580 4,280 5,710 2,280 882 661 627 686 613
9 567 612 665 1,640 4,360 5,590 2,190 865 660 631 682 607
10 561 601 675 1,710 4,460 5,470 2,100 851 661 629 674 607
11 550 603 699 1,810 4,560 5,300 2,020 837 658 629 666 611
12 542 602 722 1,880 4,650 5,150 1,940 826 655 635 657 611
13 546 593 736 1,960 4,790 5,060 1,860 814 654 636 656 612
14 552 590 740 2,010 4,870 5,010 1,800 805 654 639 661 615
15 557 587 748 2,060 4,970 4,880 1,730 790 653 638 661 607
16 577 595 784 2,100 5,160 4,800 1,660 782 652 642 655 596
17 580 601 826 2,140 5,360 4,760 1,590 774 650 644 654 585
18 579 600 842 2,180 5,530 4,670 1,530 765 651 642 649 578
19 570 601 862 2,250 5,640 4,560 1,470 754 651 641 647 570
20 563 616 871 2,380 5,720 4,450 1,430 747 649 642 642 571
21 563 627 882 2,520 5,820 4,330 1,380 743 649 641 639 567
22 563 621 915 2,630 5,860 4,170 1,330 740 647 643 640 567
23 559 614 949 2,760 5,890 4,010 1,280 740 645 643 634 571
24 554 614 973 2,860 5,960 3,870 1,230 735 642 646 647 577
25 557 612 980 2,950 6,020 3,710 1,190 728 638 645 662 573
26 548 606 990 3,030 6,090 3,570 1,160 723 637 653 664 574
27 549 613 1,010 3,090 6,140 3,430 1,130 716 636 654 654 575
28 542 625 1,050 3,130 6,130 3,270 1,100 710 637 656 644 565
29 535 625 1,080 3,160 6,080 3,160 1,070 700 635 653 636 551
30 537   1,110 3,240 6,070 3,090 1,050 694 632 652 641 551
31 559   1,150   6,020   1,030 691   655   553