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USGS Daily Statistics for Washington

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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 12150800 SNOHOMISH RIVER NEAR MONROE, WA


Snohomish County, Washington
Hydrologic Unit Code 17110011
Latitude  47°49'52", Longitude 122°02'50" NAD27
Drainage area 1,537  square miles
Gage datum 17.05 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 1962-10-01 -> 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 10,500 13,500 9,950 10,200 11,900 13,900 8,910 3,610 2,690 4,810 10,500 13,800
2 10,700 12,500 9,480 9,990 11,600 14,600 8,840 3,510 3,140 4,500 11,400 14,700
3 11,200 11,900 9,420 9,560 11,900 14,600 8,750 3,400 3,000 4,520 10,900 15,100
4 11,700 11,400 9,410 9,270 11,900 14,400 8,570 3,350 2,720 4,350 13,000 16,200
5 12,900 11,500 9,490 9,980 12,200 14,400 8,220 3,250 2,550 4,130 13,000 14,800
6 12,900 11,000 10,000 11,000 12,700 14,300 7,960 3,160 2,600 3,840 12,000 13,500
7 14,400 11,300 9,510 10,800 12,600 13,900 7,800 3,050 2,700 3,910 13,100 12,600
8 15,400 11,200 8,920 10,400 12,500 13,600 7,610 3,110 2,720 4,330 13,500 12,100
9 14,300 11,300 9,190 10,400 12,500 13,000 7,720 2,960 2,730 4,640 12,500 12,300
10 13,300 10,900 9,910 10,500 12,400 12,900 7,430 2,810 2,740 4,830 12,000 12,900
11 12,500 10,200 10,000 10,500 12,400 12,800 7,130 2,740 2,960 5,010 12,200 13,400
12 12,400 9,760 10,300 10,500 12,900 12,600 7,030 2,720 2,870 5,000 12,800 13,200
13 13,500 10,500 10,400 10,500 13,300 12,700 7,480 2,720 2,590 5,140 13,400 13,700
14 14,100 10,500 10,200 10,900 13,400 12,800 7,130 2,690 2,740 5,630 14,400 13,500
15 15,000 11,200 10,400 11,100 13,600 12,600 6,710 2,600 2,910 5,900 13,500 13,200
16 14,600 12,400 10,500 10,600 14,100 12,400 6,430 2,620 3,100 6,340 13,300 12,700
17 14,400 11,800 10,200 10,600 14,300 12,000 6,250 2,600 3,210 6,440 12,600 12,700
18 15,500 11,100 9,780 10,400 14,000 11,900 6,080 2,590 3,640 6,180 12,600 12,800
19 15,800 11,900 10,300 10,300 13,800 12,100 5,670 2,570 3,290 6,340 12,500 11,900
20 14,700 12,100 9,910 11,000 13,800 11,600 5,460 2,550 3,400 7,140 12,600 12,200
21 13,600 11,200 9,470 11,000 13,700 11,300 5,320 2,540 3,560 7,860 12,600 12,700
22 12,000 11,100 9,070 10,500 13,900 11,100 5,050 2,560 3,500 8,770 12,500 12,000
23 12,100 10,500 9,440 10,700 13,900 10,900 4,780 2,550 3,970 8,520 12,800 11,800
24 13,800 10,300 9,570 11,300 13,500 10,700 4,680 2,670 3,870 7,770 15,400 11,900
25 14,200 9,690 9,460 11,000 13,300 10,700 4,590 2,760 3,750 7,680 16,800 11,900
26 13,200 9,120 9,370 10,800 13,400 10,300 4,440 2,870 3,510 8,150 15,700 12,500
27 12,300 8,910 9,200 11,000 13,500 9,870 4,350 2,740 3,440 8,750 13,900 12,400
28 12,500 9,470 9,180 11,900 13,800 9,700 4,180 2,790 3,470 8,600 14,200 11,500
29 12,800 13,700 9,310 12,100 14,200 9,730 4,100 2,770 3,670 9,160 14,200 10,800
30 13,900   9,840 12,000 14,600 9,280 3,970 2,750 4,300 9,100 14,000 11,100
31 14,100   10,400   13,900   3,790 2,630   10,300   10,300