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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 13,600
2 10,700 12,500 9,480 9,990 11,600 14,600 8,840 3,510 3,140 4,500 11,400 14,500
3 11,200 11,900 9,420 9,560 11,900 14,600 8,750 3,400 3,000 4,470 10,900 14,900
4 11,700 11,400 9,410 9,270 11,900 14,400 8,570 3,350 2,720 4,310 13,000 16,000
5 12,900 11,500 9,490 9,980 12,200 14,400 8,220 3,250 2,550 4,090 13,000 14,700
6 12,900 11,000 10,000 11,000 12,700 14,300 7,960 3,160 2,600 3,810 12,000 13,400
7 14,300 11,300 9,510 10,800 12,600 13,900 7,800 3,050 2,700 3,880 13,000 12,500
8 15,300 11,200 8,920 10,400 12,500 13,600 7,610 3,110 2,720 4,290 13,400 12,300
9 14,200 11,300 9,190 10,400 12,500 13,000 7,720 2,960 2,730 4,600 12,400 12,400
10 13,200 10,900 9,910 10,500 12,400 12,900 7,430 2,810 2,740 4,780 11,900 12,900
11 12,500 10,200 10,000 10,500 12,400 12,800 7,130 2,740 2,960 4,960 12,100 13,300
12 12,400 9,760 10,300 10,500 12,900 12,600 7,030 2,720 2,870 4,950 12,800 13,100
13 13,500 10,500 10,400 10,500 13,300 12,700 7,480 2,720 2,590 5,090 13,400 13,600
14 14,000 10,500 10,200 10,900 13,400 12,800 7,130 2,690 2,740 5,560 14,400 13,400
15 14,900 11,200 10,400 11,100 13,600 12,600 6,710 2,600 2,910 5,830 13,600 13,100
16 14,500 12,400 10,500 10,600 14,100 12,400 6,430 2,620 3,100 6,270 13,300 12,600
17 14,300 11,800 10,200 10,600 14,300 12,000 6,250 2,600 3,210 6,370 12,700 12,600
18 15,300 11,100 9,780 10,400 14,000 11,900 6,080 2,590 3,640 6,130 12,800 13,000
19 15,600 11,900 10,300 10,300 13,800 12,100 5,670 2,570 3,290 6,320 12,500 12,100
20 14,500 12,100 9,910 11,000 13,800 11,600 5,460 2,550 3,400 7,230 12,600 12,300
21 13,500 11,200 9,470 11,000 13,700 11,300 5,320 2,540 3,560 7,910 12,500 12,700
22 11,900 11,100 9,070 10,500 13,900 11,100 5,050 2,560 3,500 8,770 12,400 12,100
23 11,900 10,500 9,440 10,700 13,900 10,900 4,780 2,550 3,970 8,500 12,800 11,800
24 13,800 10,300 9,570 11,300 13,500 10,700 4,680 2,670 3,870 7,730 15,300 12,000
25 14,200 9,690 9,460 11,000 13,300 10,700 4,590 2,760 3,750 7,640 16,600 11,900
26 13,200 9,120 9,370 10,800 13,400 10,300 4,440 2,870 3,510 8,090 15,600 12,600
27 12,300 8,910 9,200 11,000 13,500 9,870 4,350 2,740 3,440 8,800 13,800 12,500
28 12,500 9,470 9,180 11,900 13,800 9,700 4,180 2,790 3,470 8,740 14,100 11,600
29 12,800 13,700 9,310 12,100 14,200 9,730 4,100 2,770 3,670 9,260 14,100 11,000
30 13,900   9,840 12,000 14,600 9,280 3,970 2,750 4,300 9,130 13,800 11,300
31 14,100   10,400   13,900   3,790 2,630   10,300   10,400