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USGS Daily Statistics for the Nation

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 12181000 SKAGIT RIVER AT MARBLEMOUNT, WA


Skagit County, Washington
Hydrologic Unit Code 17110005
Latitude  48°32'02", Longitude 121°25'43" NAD27
Drainage area 1,381  square miles
Gage datum 308.64 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 1942-10-01 -> 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 5,710 7,220 6,300 5,460 5,700 7,040 8,350 5,530 3,910 3,980 5,780 7,070
2 6,070 6,920 6,360 5,160 5,690 7,080 8,620 5,320 3,950 4,070 5,960 7,240
3 6,370 6,640 6,290 5,230 5,740 6,940 8,310 5,310 3,840 4,040 6,080 7,120
4 6,820 6,690 6,350 5,140 5,750 7,010 8,010 5,360 3,720 4,500 6,620 7,460
5 6,720 6,850 6,370 5,190 5,850 7,090 7,930 5,200 3,770 4,080 6,420 7,050
6 6,690 6,860 6,450 5,310 5,950 6,930 7,890 5,140 3,910 4,000 6,870 6,490
7 7,060 6,870 6,460 5,360 5,900 7,040 7,970 5,090 4,010 4,130 6,860 6,000
8 7,120 6,930 6,330 5,460 6,000 6,890 7,980 5,020 4,170 4,100 7,200 6,000
9 6,760 7,090 6,400 5,440 5,960 6,890 7,970 4,900 4,170 3,910 6,800 6,270
10 6,820 7,450 6,400 5,310 5,990 6,910 7,680 4,850 4,150 4,200 7,100 6,640
11 6,810 7,060 6,310 5,340 6,330 7,020 7,640 4,740 4,170 4,170 6,910 6,590
12 6,970 6,840 6,570 5,430 6,720 7,080 7,880 4,740 3,900 4,160 7,500 6,320
13 7,010 6,660 6,390 5,500 6,580 7,220 7,990 4,740 3,910 4,200 7,410 6,540
14 6,850 6,750 6,320 5,640 6,470 7,200 7,950 4,660 3,940 4,300 8,090 6,320
15 6,880 6,990 6,120 5,620 6,630 7,380 7,920 4,690 4,010 4,380 8,040 6,100
16 7,020 6,980 6,000 5,710 6,740 7,650 7,640 4,440 3,940 4,860 7,320 5,930
17 7,170 6,860 5,710 5,690 6,670 7,840 7,530 4,290 4,090 5,190 7,290 5,920
18 7,550 6,740 5,750 5,660 6,650 7,910 7,440 4,320 4,040 4,720 6,910 5,890
19 7,420 6,640 5,880 5,790 6,610 7,940 7,200 4,090 3,950 4,900 6,970 5,690
20 6,870 6,670 5,830 5,830 6,720 7,920 7,020 3,970 4,040 5,150 6,820 5,760
21 6,820 6,690 5,900 5,680 6,630 7,780 6,930 3,930 3,920 5,140 6,820 5,690
22 6,790 6,800 5,810 5,680 6,630 7,540 6,890 3,910 3,930 5,370 7,060 5,690
23 6,810 6,810 5,820 5,760 6,670 7,650 6,910 3,860 3,910 5,020 7,530 5,730
24 6,970 6,900 5,640 5,800 6,780 7,670 6,800 3,900 4,020 4,920 7,290 5,780
25 7,010 6,830 5,590 5,630 6,910 7,710 6,670 4,050 3,960 5,220 7,300 5,500
26 7,140 6,720 5,560 5,640 6,990 7,710 6,580 3,840 4,010 5,280 7,480 5,920
27 6,920 6,560 5,550 5,820 7,030 7,720 6,190 3,780 4,070 5,360 7,810 5,870
28 7,290 6,440 5,600 6,030 7,030 7,770 5,940 3,720 4,050 5,460 7,580 5,890
29 7,040 6,110 5,590 5,980 6,920 8,260 5,810 3,800 4,110 5,490 7,290 5,800
30 7,080   5,690 6,030 6,840 8,350 5,830 3,910 4,170 5,680 7,070 5,640
31 6,940   5,660   7,000   5,700 3,840   5,940   5,620