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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 14211720 WILLAMETTE RIVER AT PORTLAND, OR


Multnomah County, Oregon
Hydrologic Unit Code 17090012
Latitude  45°31'03", Longitude 122°40'09" NAD83
Drainage area 11,200  square miles
Gage datum 1.55 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 1972-10-01 -> 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 67,900 57,900 47,700 42,800 30,700 22,800 12,500 8,610 8,800 13,000 23,000 54,100
2 66,000 56,800 48,100 41,600 30,000 22,900 12,200 8,510 8,890 12,900 24,800 56,500
3 64,200 54,900 47,300 40,700 29,600 23,100 12,000 8,430 8,950 12,800 25,300 60,400
4 63,700 51,900 46,500 39,900 30,100 23,200 12,000 8,320 9,270 12,900 24,400 64,300
5 63,500 48,300 46,000 39,200 30,600 23,300 11,700 8,520 9,380 12,900 24,700 64,100
6 64,600 47,000 46,400 38,300 30,900 23,300 11,400 8,490 9,560 12,900 25,600 62,900
7 65,200 48,300 45,800 39,100 31,100 24,400 10,900 8,460 9,470 13,100 27,400 62,500
8 64,800 50,700 44,800 39,400 30,800 24,700 10,700 8,740 9,560 12,900 28,700 61,800
9 65,200 52,300 43,600 39,700 30,300 23,900 10,500 8,580 9,900 13,200 28,400 60,700
10 65,900 51,300 44,000 40,000 29,400 23,100 10,400 8,380 9,900 13,400 28,600 60,300
11 67,600 47,900 44,500 40,800 28,800 22,700 10,100 8,310 10,100 13,800 29,400 60,700
12 68,000 45,600 44,600 41,200 28,400 21,900 9,960 8,420 10,300 13,900 30,400 60,900
13 71,100 45,300 45,200 40,400 27,800 21,100 9,760 8,460 10,300 14,100 31,900 61,700
14 72,700 45,800 45,900 40,400 26,800 20,700 9,710 8,310 10,400 14,300 33,100 63,500
15 72,800 47,000 46,700 39,600 27,300 19,900 9,680 8,270 10,500 14,500 34,600 63,800
16 73,400 48,300 47,900 38,300 27,300 19,100 9,490 8,330 10,500 14,300 35,900 64,600
17 73,500 50,900 47,500 37,300 27,600 18,300 9,440 8,450 10,700 14,500 36,500 65,100
18 73,700 52,700 46,500 36,000 27,900 17,500 9,310 8,530 11,000 14,700 37,900 64,700
19 74,500 54,700 45,200 35,200 27,900 16,900 9,320 8,430 11,400 15,100 39,300 63,700
20 72,900 55,800 43,900 33,700 27,900 16,300 9,260 8,510 11,600 15,800 41,700 63,500
21 70,000 56,000 42,700 33,300 27,200 16,000 9,120 8,540 11,500 16,200 44,200 65,300
22 66,900 55,100 41,800 33,200 26,700 15,600 9,050 8,560 11,600 17,000 46,600 66,200
23 64,900 54,100 41,800 32,900 26,000 15,000 8,900 8,560 11,400 17,600 48,600 65,400
24 63,800 52,900 42,400 33,100 25,400 14,500 8,780 8,500 11,600 17,600 50,000 63,700
25 63,900 52,000 42,900 34,200 24,700 14,000 8,780 8,630 11,600 17,400 51,600 63,000
26 63,000 50,000 42,000 34,700 24,300 13,900 8,550 8,740 11,700 18,200 53,900 62,000
27 61,600 48,700 41,300 34,600 24,000 13,500 8,780 8,820 11,700 18,700 54,300 63,000
28 60,300 47,500 41,300 34,400 23,800 13,300 8,550 8,760 11,900 19,100 55,200 65,500
29 59,700 47,800 41,800 33,100 23,500 13,200 8,570 8,760 12,000 20,100 54,300 67,300
30 58,900   43,000 32,000 23,400 13,000 8,690 8,810 12,500 20,800 53,300 70,000
31 57,400   43,400   23,200   8,590 8,640   21,600   70,300