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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 12389000 Clark Fork near Plains MT


Sanders County, Montana
Hydrologic Unit Code 17010213
Latitude  47°25'45.12", Longitude 114°51'23.52" NAD83
Drainage area 19,964  square miles
Gage datum 2,449.11 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 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 11,900 11,900 11,700 13,700 29,400 57,900 40,300 13,800 9,230 9,780 11,200 11,600
2 11,700 11,900 11,700 13,900 30,000 57,600 38,900 13,400 9,160 9,910 11,200 11,700
3 12,000 11,900 11,600 14,100 30,600 57,200 37,700 13,100 9,050 9,900 11,300 11,800
4 12,100 11,900 11,600 14,300 31,300 57,300 36,800 12,900 9,120 10,000 11,300 12,100
5 12,000 11,800 11,600 14,400 32,200 57,700 35,500 12,400 9,280 10,000 11,400 12,200
6 12,200 11,900 11,600 14,700 33,300 58,100 34,600 12,200 9,240 10,100 11,300 12,200
7 12,200 12,000 11,600 15,000 34,500 58,300 33,500 12,000 9,180 10,100 11,200 12,000
8 12,300 12,100 11,500 15,300 35,500 58,600 32,200 11,800 9,260 10,200 11,300 12,000
9 12,200 12,100 11,400 15,700 36,500 58,800 30,800 11,500 9,290 10,200 11,400 12,100
10 12,400 12,100 11,600 16,100 37,600 58,300 29,400 11,200 9,390 10,100 11,400 12,200
11 12,300 12,100 11,600 16,500 38,600 57,600 28,200 11,000 9,490 10,200 11,300 12,300
12 12,300 12,100 11,800 16,800 39,800 56,900 27,100 10,800 9,340 10,200 11,300 12,300
13 12,200 12,100 11,900 17,100 40,700 56,000 26,000 10,800 9,320 10,200 11,300 12,400
14 12,200 12,100 11,900 17,800 41,600 55,700 25,400 10,600 9,360 10,100 11,300 12,500
15 12,100 12,100 12,000 18,500 42,700 55,400 24,600 10,500 9,380 10,200 11,400 12,600
16 12,300 12,100 12,100 19,100 44,200 54,600 23,800 10,400 9,380 10,200 11,500 12,700
17 12,400 12,000 12,000 19,500 45,500 54,400 23,100 10,200 9,310 10,300 11,600 12,700
18 12,300 12,000 12,100 20,000 47,100 54,100 22,000 9,990 9,330 10,300 11,600 12,500
19 12,100 11,900 12,200 20,600 48,300 53,500 20,500 9,880 9,510 10,400 11,700 12,400
20 12,000 12,000 12,400 21,200 49,200 52,500 19,900 9,830 9,420 10,400 11,600 12,400
21 12,100 12,100 12,400 22,000 50,200 51,800 19,300 9,830 9,550 10,500 11,600 12,600
22 12,000 12,100 12,500 22,900 51,300 51,300 18,800 9,780 9,630 10,800 11,700 12,500
23 12,100 11,900 12,600 23,600 52,200 50,000 18,200 9,720 9,660 10,800 11,600 12,400
24 12,100 11,900 12,600 24,400 52,900 48,300 17,500 9,620 9,710 10,700 11,500 12,500
25 12,100 12,000 12,700 25,200 53,700 47,400 17,000 9,640 9,810 10,700 11,600 12,200
26 12,100 12,000 12,700 25,800 54,400 46,000 16,500 9,570 9,790 10,900 11,700 11,800
27 11,900 11,900 12,700 26,200 55,300 44,600 15,900 9,510 9,780 10,900 11,700 11,900
28 11,800 11,900 12,900 26,800 56,400 43,600 15,700 9,430 9,850 11,000 11,600 12,300
29 11,700 11,500 13,100 27,500 56,700 42,900 15,300 9,330 9,760 11,000 11,600 12,200
30 11,800   13,300 28,200 57,000 41,700 14,900 9,380 9,690 11,100 11,600 12,200
31 11,800   13,400   57,300   14,400 9,250   11,100   12,100