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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 12388700 Flathead River at Perma MT


Sanders County, Montana
Hydrologic Unit Code 17010212
Latitude  47°22'00.45", Longitude 114°35'06.00" NAD83
Drainage area 9,024  square miles
Contributing drainage area 9,004  square miles
Gage datum 2,469.3 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 1983-10-01 -> 2024-09-30)

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 10,500 9,790 9,320 9,040 14,400 24,600 21,600 8,980 6,820 7,700 8,750 9,560
2 10,400 9,880 9,360 9,020 14,400 24,700 20,700 8,820 6,810 7,770 8,920 9,640
3 10,500 9,700 9,380 8,980 14,700 24,800 20,800 8,580 6,690 7,730 8,950 9,900
4 10,300 9,770 9,200 9,020 14,900 24,800 20,200 8,350 6,510 7,920 9,100 10,200
5 10,200 9,670 9,120 9,160 15,100 25,100 19,800 8,160 6,720 7,900 9,080 10,300
6 10,200 9,590 9,120 9,340 15,400 25,600 19,100 7,920 6,810 8,000 8,810 10,400
7 10,200 9,600 9,050 9,340 15,700 26,200 18,100 7,740 6,790 7,910 8,710 10,300
8 10,200 9,620 8,970 9,470 16,100 26,900 17,100 7,730 6,760 7,940 8,680 10,500
9 10,200 9,710 8,950 9,610 16,400 27,500 15,800 7,450 6,820 7,810 8,740 10,600
10 9,910 9,600 8,870 9,690 16,700 27,500 15,000 7,290 6,950 7,730 8,850 10,700
11 9,870 9,580 8,780 9,830 17,100 26,900 14,400 7,170 6,820 7,700 9,030 10,800
12 9,950 9,720 8,880 9,950 17,600 26,300 13,900 7,060 6,780 7,620 9,150 10,700
13 9,860 9,810 8,790 10,100 17,900 26,100 13,800 7,170 6,820 7,620 9,160 10,600
14 9,770 9,760 8,790 10,300 18,000 25,900 13,500 7,080 6,840 7,610 9,190 10,700
15 9,910 9,790 8,820 10,300 18,500 25,300 13,100 7,150 6,950 7,570 9,290 10,800
16 10,100 9,720 8,770 10,400 19,000 25,100 12,800 7,150 6,870 7,520 9,390 10,900
17 10,200 9,730 8,770 10,500 19,400 26,000 12,900 7,050 6,740 7,470 9,360 10,900
18 10,100 9,670 8,670 10,600 19,900 26,200 12,400 7,060 6,890 7,560 9,410 10,900
19 9,940 9,570 8,780 10,800 20,300 26,000 11,800 7,080 7,070 7,570 9,540 10,700
20 9,970 9,620 8,700 11,000 20,500 25,700 11,400 7,110 7,000 7,450 9,570 10,800
21 9,960 9,600 8,700 11,200 20,500 25,300 11,200 7,190 7,110 7,400 9,570 10,900
22 10,000 9,510 8,740 11,400 20,700 26,000 10,700 7,050 7,160 7,440 9,590 10,800
23 10,100 9,320 8,860 11,700 21,100 25,700 10,600 6,990 7,280 7,440 9,500 10,700
24 10,000 9,390 8,830 12,100 21,300 24,700 10,200 7,020 7,410 7,400 9,340 10,600
25 9,950 9,720 8,810 12,400 21,800 24,100 10,100 7,020 7,360 7,540 9,500 10,400
26 9,860 9,610 8,620 12,800 22,400 23,800 9,980 7,100 7,490 7,740 9,520 10,300
27 9,750 9,530 8,720 13,000 22,900 23,300 9,590 7,090 7,570 7,900 9,490 10,400
28 9,700 9,370 8,920 13,300 23,600 22,900 9,810 7,010 7,620 7,890 9,400 10,600
29 9,740 10,000 8,980 13,600 23,600 22,600 9,600 6,920 7,580 8,190 9,460 10,600
30 9,780   8,970 14,200 23,600 21,800 9,470 7,200 7,490 8,330 9,530 10,700
31 9,770   8,930   24,300   9,230 6,940   8,570   10,600