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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 06329500 Yellowstone River near Sidney MT


Richland County, Montana
Hydrologic Unit Code 10100004
Latitude  47°40'38.69", Longitude 104°09'19.48" NAD83
Drainage area 69,099  square miles
Contributing drainage area 68,407  square miles
Gage datum 1,882.87 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 1910-10-01 -> 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 5,560 5,870 8,140 11,900 11,300 31,900 35,600 11,600 6,210 8,310 7,840 6,800
2 5,540 5,910 8,020 11,600 11,400 33,000 34,200 11,300 6,230 8,640 7,840 6,790
3 5,530 5,940 8,030 12,100 11,400 33,300 33,100 11,100 6,300 8,900 7,820 6,700
4 5,540 5,940 8,060 11,300 11,700 33,500 32,300 10,800 6,260 8,490 7,830 6,610
5 5,600 6,000 8,280 11,200 11,900 33,900 31,700 10,600 6,250 8,330 7,840 6,500
6 5,580 6,070 8,780 11,200 12,100 34,400 31,000 10,300 6,290 8,330 7,790 6,390
7 5,630 6,120 8,870 10,900 12,500 35,400 29,800 9,910 6,370 8,380 7,740 6,380
8 5,630 6,180 8,930 10,600 13,100 35,900 28,800 9,560 6,630 8,440 7,720 6,270
9 5,550 6,290 9,040 10,300 13,400 37,300 27,700 9,350 6,580 8,330 7,660 6,110
10 5,520 6,440 9,260 10,100 14,000 38,600 26,900 8,940 6,650 8,290 7,640 5,910
11 5,570 6,440 9,790 9,820 14,900 39,300 26,100 8,610 6,600 8,250 7,610 5,770
12 5,710 6,470 9,940 9,550 16,000 39,800 24,900 8,260 6,560 8,290 7,550 5,660
13 5,800 6,510 10,000 9,410 16,400 40,300 23,900 8,020 6,640 8,220 7,490 5,720
14 5,790 6,660 10,300 9,460 16,600 40,300 23,000 7,860 6,690 8,160 7,430 5,810
15 5,770 6,790 10,400 9,450 16,800 40,000 22,400 7,800 6,810 8,170 7,320 5,850
16 5,760 6,850 10,600 9,390 16,600 40,400 21,900 7,830 6,960 8,140 7,280 5,800
17 5,820 6,990 10,700 9,310 16,900 40,700 20,900 7,840 6,930 8,090 7,250 5,820
18 5,810 7,060 10,700 9,320 17,600 41,000 19,900 7,790 6,970 8,070 7,220 5,820
19 5,880 7,090 11,200 9,350 18,500 42,400 18,900 7,580 6,980 8,100 7,160 5,830
20 5,890 7,210 11,900 9,430 19,600 43,000 17,900 7,360 7,010 8,120 7,130 5,770
21 5,930 7,480 12,900 9,530 21,100 42,800 17,000 7,090 7,100 8,070 7,100 5,750
22 5,940 7,710 13,400 9,490 22,600 41,800 16,200 6,880 7,200 8,110 7,060 5,770
23 5,970 7,420 13,700 9,550 23,900 40,700 15,700 6,730 7,280 8,080 6,970 5,730
24 5,940 7,290 13,500 9,650 25,100 39,900 14,900 6,890 7,390 8,060 6,910 5,730
25 5,910 7,360 12,700 9,870 25,800 39,200 14,200 6,820 7,470 8,050 6,900 5,730
26 5,900 7,490 11,900 10,100 26,300 38,600 13,800 6,780 7,600 8,080 6,940 5,790
27 5,930 7,680 11,300 10,400 26,800 38,400 13,500 6,620 7,770 7,990 6,930 5,730
28 5,880 7,770 11,700 10,600 27,600 38,200 13,200 6,410 7,790 7,960 6,850 5,720
29 5,840 8,300 12,000 10,900 28,600 37,300 13,000 6,310 7,810 7,980 6,870 5,740
30 5,840   11,400 11,100 29,700 36,600 12,600 6,390 8,050 7,920 6,850 5,740
31 5,880   11,800   30,800   12,200 6,260   7,870   5,670