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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 12354500 Clark Fork at St. Regis MT


Mineral County, Montana
Hydrologic Unit Code 17010204
Latitude  47°18'05.90", Longitude 115°05'12.73" NAD83
Drainage area 10,728  square miles
Gage datum 2,600.37 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 1929-10-01 -> 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 3,070 3,110 3,630 5,930 13,500 25,500 13,300 3,790 2,770 3,050 3,550 3,550
2 3,010 3,160 3,600 6,090 13,700 25,300 12,700 3,730 2,790 3,080 3,550 3,550
3 2,970 3,190 3,610 6,250 14,000 25,100 12,200 3,630 2,790 3,120 3,590 3,630
4 2,920 3,200 3,630 6,350 14,500 25,300 11,700 3,560 2,780 3,130 3,590 3,670
5 2,910 3,170 3,600 6,410 15,100 25,400 11,200 3,480 2,760 3,140 3,600 3,640
6 2,930 3,220 3,620 6,610 15,600 25,400 10,800 3,420 2,750 3,160 3,600 3,520
7 2,990 3,260 3,650 6,920 16,300 25,200 10,300 3,360 2,750 3,160 3,620 3,410
8 3,110 3,280 3,700 7,210 16,800 24,900 9,860 3,300 2,760 3,170 3,670 3,330
9 3,120 3,400 3,730 7,420 17,200 24,400 9,380 3,240 2,770 3,190 3,750 3,280
10 3,110 3,520 3,790 7,630 17,600 23,800 8,930 3,190 2,780 3,190 3,690 3,260
11 3,060 3,550 3,870 7,810 18,000 23,300 8,550 3,120 2,800 3,210 3,630 3,290
12 3,040 3,520 3,970 8,020 18,400 22,700 8,190 3,070 2,800 3,250 3,600 3,340
13 3,020 3,430 4,010 8,260 18,700 22,100 7,830 3,050 2,820 3,290 3,590 3,380
14 3,050 3,400 4,070 8,620 19,200 21,900 7,520 3,030 2,840 3,310 3,600 3,380
15 3,100 3,410 4,160 8,940 19,700 21,700 7,210 2,990 2,850 3,310 3,570 3,400
16 3,210 3,410 4,280 9,190 20,500 21,300 6,890 2,970 2,880 3,320 3,530 3,370
17 3,290 3,450 4,400 9,380 21,300 21,100 6,560 2,930 2,920 3,350 3,510 3,300
18 3,260 3,490 4,510 9,660 22,100 20,800 6,240 2,900 2,940 3,360 3,500 3,210
19 3,200 3,500 4,660 9,890 22,500 20,300 5,960 2,870 2,970 3,380 3,500 3,160
20 3,150 3,550 4,730 10,200 22,900 19,700 5,740 2,840 2,990 3,400 3,490 3,130
21 3,100 3,610 4,760 10,700 23,400 19,200 5,530 2,820 3,010 3,400 3,480 3,150
22 3,080 3,620 4,780 11,200 23,800 18,700 5,270 2,820 3,030 3,400 3,480 3,260
23 3,060 3,560 4,900 11,500 24,000 18,100 5,050 2,830 3,050 3,410 3,450 3,580
24 3,090 3,530 4,990 12,100 24,100 17,400 4,830 2,840 3,060 3,450 3,480 3,660
25 3,130 3,560 5,080 12,400 24,300 16,700 4,640 2,870 3,060 3,460 3,610 3,500
26 3,120 3,590 5,170 12,600 24,700 16,100 4,480 2,860 3,060 3,500 3,640 3,370
27 3,040 3,610 5,250 12,600 24,900 15,400 4,340 2,840 3,040 3,520 3,620 3,320
28 3,030 3,620 5,350 12,700 25,300 14,700 4,200 2,820 3,030 3,530 3,570 3,260
29 3,020 3,830 5,520 12,900 25,400 14,200 4,070 2,800 3,030 3,540 3,530 3,160
30 2,980   5,710 13,100 25,500 13,700 3,970 2,780 3,040 3,570 3,550 3,110
31 3,000   5,810   25,700   3,870 2,770   3,570   3,100