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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 06054500 Missouri River at Toston MT


Broadwater County, Montana
Hydrologic Unit Code 10030101
Latitude  46°08'47.66", Longitude 111°25'13.00" NAD83
Drainage area 14,641  square miles
Gage datum 3,905.68 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 1889-10-01 -> 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 3,290 3,480 3,700 4,460 6,340 12,200 8,630 2,710 2,750 3,620 4,520 4,100
2 3,250 3,470 3,680 4,560 6,410 12,300 8,270 2,690 2,780 3,660 4,520 4,090
3 3,220 3,500 3,680 4,620 6,430 12,400 7,900 2,660 2,800 3,690 4,560 4,100
4 3,220 3,520 3,680 4,620 6,500 12,700 7,630 2,640 2,810 3,770 4,580 4,120
5 3,270 3,540 3,670 4,640 6,610 13,000 7,440 2,620 2,840 3,800 4,640 3,980
6 3,280 3,500 3,700 4,750 6,720 13,200 7,170 2,590 2,870 3,830 4,660 3,840
7 3,320 3,490 3,790 4,830 6,860 13,500 6,820 2,570 2,840 3,890 4,640 3,770
8 3,360 3,510 3,840 4,910 7,070 13,600 6,470 2,530 2,880 3,910 4,600 3,710
9 3,340 3,510 3,870 5,000 7,300 13,500 6,120 2,500 2,920 3,930 4,610 3,640
10 3,320 3,520 3,920 5,050 7,450 13,500 5,850 2,470 2,970 3,960 4,610 3,630
11 3,310 3,550 3,930 5,110 7,640 13,500 5,630 2,450 3,010 3,980 4,590 3,630
12 3,290 3,560 3,970 5,220 7,760 13,400 5,390 2,450 3,060 4,030 4,550 3,670
13 3,320 3,590 4,000 5,280 7,790 13,200 5,150 2,440 3,100 4,070 4,520 3,700
14 3,360 3,620 3,980 5,360 7,860 13,000 4,930 2,460 3,130 4,120 4,570 3,640
15 3,420 3,640 3,960 5,430 8,020 12,800 4,690 2,460 3,160 4,190 4,580 3,620
16 3,420 3,650 3,990 5,490 8,190 12,600 4,470 2,440 3,180 4,240 4,540 3,590
17 3,420 3,700 4,050 5,570 8,450 12,500 4,210 2,460 3,200 4,270 4,550 3,550
18 3,390 3,760 4,140 5,620 8,770 12,400 3,990 2,450 3,240 4,310 4,530 3,540
19 3,430 3,760 4,190 5,700 9,120 12,200 3,830 2,490 3,300 4,300 4,490 3,490
20 3,410 3,770 4,150 5,800 9,380 12,000 3,690 2,470 3,320 4,320 4,440 3,450
21 3,380 3,730 4,180 5,890 9,610 11,700 3,550 2,500 3,380 4,360 4,410 3,490
22 3,380 3,750 4,220 5,970 10,000 11,400 3,450 2,520 3,450 4,390 4,370 3,530
23 3,390 3,710 4,260 6,070 10,300 11,100 3,320 2,550 3,470 4,410 4,320 3,550
24 3,400 3,670 4,320 6,210 10,500 10,800 3,200 2,580 3,490 4,450 4,360 3,470
25 3,380 3,690 4,340 6,230 10,600 10,500 3,080 2,610 3,460 4,470 4,360 3,430
26 3,380 3,650 4,340 6,260 10,800 10,200 2,990 2,650 3,470 4,450 4,340 3,400
27 3,370 3,640 4,370 6,240 10,900 9,870 2,890 2,650 3,480 4,460 4,280 3,380
28 3,360 3,670 4,390 6,220 11,200 9,630 2,820 2,640 3,540 4,470 4,240 3,370
29 3,350 3,740 4,430 6,220 11,500 9,320 2,790 2,680 3,560 4,490 4,180 3,340
30 3,350   4,450 6,260 11,900 8,970 2,760 2,680 3,600 4,490 4,120 3,340
31 3,400   4,460   12,100   2,720 2,700   4,500   3,360