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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 06065500 Missouri River bl Hauser Dam near Helena MT


Lewis And Clark County, Montana
Hydrologic Unit Code 10030101
Latitude  46°45'58.29", Longitude 111°53'19.66" NAD83
Drainage area 16,669  square miles
Gage datum 3,580 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 1922-10-01 -> 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 3,660 3,780 3,950 4,520 5,890 7,660 6,690 3,490 3,430 3,530 3,740 3,890
2 3,760 3,890 3,950 4,590 5,820 7,620 6,570 3,470 3,410 3,560 3,720 3,920
3 3,840 3,830 4,000 4,590 5,830 7,760 6,290 3,510 3,470 3,580 3,750 4,000
4 3,800 3,860 4,020 4,570 5,890 7,770 5,870 3,470 3,570 3,570 3,690 4,000
5 3,820 3,930 4,030 4,640 5,900 7,660 5,990 3,440 3,580 3,550 3,730 4,010
6 3,800 3,980 4,070 4,670 5,920 7,620 6,190 3,520 3,490 3,540 3,730 3,960
7 3,760 4,090 4,120 4,800 5,880 7,890 6,000 3,550 3,390 3,460 3,650 4,010
8 3,770 4,090 4,140 4,750 5,950 8,060 5,850 3,460 3,490 3,450 3,660 3,990
9 3,780 4,090 4,150 4,720 6,020 8,220 5,700 3,420 3,550 3,570 3,660 3,930
10 3,870 4,040 4,270 4,760 6,130 8,410 5,570 3,460 3,590 3,630 3,680 3,910
11 3,880 3,990 4,300 4,830 6,130 8,520 5,340 3,500 3,600 3,610 3,740 3,890
12 3,880 3,950 4,340 4,870 6,150 8,500 5,220 3,460 3,520 3,640 3,720 3,840
13 3,900 3,940 4,420 5,020 6,140 8,360 5,030 3,480 3,630 3,640 3,750 3,800
14 3,860 3,990 4,450 5,140 6,270 8,280 4,840 3,520 3,610 3,630 3,750 3,870
15 3,850 3,960 4,450 5,230 6,380 8,270 4,650 3,500 3,640 3,710 3,730 3,840
16 3,890 3,980 4,390 5,320 6,410 8,200 4,540 3,470 3,650 3,690 3,810 3,820
17 3,840 4,070 4,400 5,340 6,480 8,280 4,450 3,490 3,630 3,640 3,800 3,840
18 3,850 3,960 4,400 5,290 6,560 8,570 4,390 3,490 3,610 3,680 3,840 3,840
19 3,860 3,920 4,440 5,250 6,620 8,380 4,200 3,480 3,560 3,720 3,930 3,760
20 3,920 3,920 4,490 5,360 6,910 8,170 4,120 3,460 3,590 3,680 3,940 3,730
21 3,890 3,930 4,590 5,440 7,060 8,100 4,040 3,480 3,580 3,720 3,830 3,760
22 3,790 3,880 4,610 5,410 7,060 7,840 3,970 3,470 3,610 3,700 3,800 3,800
23 3,820 3,960 4,550 5,370 7,140 7,810 3,930 3,560 3,630 3,650 3,810 3,870
24 3,820 3,990 4,560 5,510 7,170 7,670 3,850 3,510 3,720 3,670 3,780 3,860
25 3,810 4,040 4,570 5,570 7,170 7,580 3,750 3,540 3,750 3,720 3,740 3,490
26 3,780 3,990 4,520 5,610 7,340 7,380 3,640 3,520 3,620 3,680 3,870 3,660
27 3,740 3,940 4,460 5,530 7,460 7,190 3,620 3,530 3,560 3,720 3,900 3,850
28 3,790 3,970 4,470 5,710 7,700 7,070 3,580 3,570 3,640 3,690 3,810 3,760
29 3,890 4,520 4,530 5,740 7,890 6,930 3,570 3,540 3,620 3,770 3,900 3,720
30 3,900   4,530 5,780 7,760 6,790 3,510 3,530 3,620 3,750 3,880 3,690
31 3,870   4,520   7,740   3,550 3,500   3,710   3,700