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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 06052500 Gallatin River at Logan MT


Gallatin County, Montana
Hydrologic Unit Code 10020008
Latitude  45°53'10.49", Longitude 111°26'31.23" NAD83
Drainage area 1,789  square miles
Gage datum 4,086.42 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 1893-10-01 -> 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
1 685 671 708 864 1,360 3,090 2,030 452 532 691 806 782
2 684 674 711 892 1,380 3,140 1,920 448 537 696 807 785
3 677 666 711 877 1,420 3,160 1,830 445 540 701 810 783
4 675 668 708 869 1,480 3,240 1,760 445 536 707 818 773
5 677 688 699 878 1,540 3,310 1,680 448 538 710 819 760
6 679 686 712 895 1,580 3,410 1,570 448 544 713 818 754
7 683 675 724 909 1,650 3,440 1,470 443 550 717 817 747
8 685 668 727 904 1,690 3,430 1,380 441 556 721 821 744
9 685 673 732 924 1,710 3,410 1,290 444 565 720 824 740
10 681 668 743 956 1,740 3,350 1,210 443 570 720 820 739
11 674 675 752 957 1,770 3,330 1,130 444 580 726 820 745
12 669 673 749 971 1,810 3,240 1,070 443 600 737 821 736
13 671 677 755 968 1,870 3,230 999 450 603 742 825 734
14 674 680 748 986 1,930 3,220 946 452 601 743 823 729
15 673 679 747 1,010 2,020 3,140 891 455 604 752 817 729
16 671 676 752 1,020 2,120 3,110 824 457 610 761 814 729
17 675 688 766 1,020 2,210 3,150 763 461 615 764 815 724
18 670 689 788 1,040 2,300 3,100 715 459 624 765 816 716
19 670 690 799 1,050 2,350 3,030 688 461 640 761 818 711
20 668 698 804 1,070 2,410 2,970 654 469 650 761 814 712
21 672 697 807 1,100 2,520 2,890 615 480 661 765 813 717
22 672 694 820 1,120 2,590 2,790 584 486 666 773 806 721
23 673 687 824 1,170 2,620 2,710 564 493 665 778 800 710
24 673 691 836 1,210 2,640 2,640 539 499 666 782 805 702
25 670 701 845 1,230 2,680 2,570 521 505 662 781 806 697
26 670 701 850 1,240 2,730 2,520 506 507 662 785 798 694
27 664 701 855 1,240 2,800 2,450 500 510 670 788 794 694
28 666 712 847 1,260 2,880 2,370 483 511 683 787 788 695
29 663 750 863 1,290 2,990 2,240 470 519 679 791 781 694
30 662   864 1,330 3,090 2,130 464 520 686 792 780 693
31 667   852   3,100   456 524   802   689