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USGS Surface-Water Daily Statistics for Oregon

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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 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 -> 2020-09-30)

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 68,300 57,500 47,800 43,900 30,500 23,100 12,400 8,700 9,070 13,300 24,000 57,600
2 66,500 56,600 47,600 42,300 29,700 23,200 12,100 8,630 9,060 13,200 25,900 60,300
3 64,000 54,800 46,700 41,400 29,200 23,400 12,000 8,570 9,110 13,100 26,300 64,800
4 62,500 51,800 46,100 40,700 29,700 23,500 11,900 8,480 9,370 13,200 25,300 68,600
5 61,500 48,500 46,100 39,900 30,000 23,500 11,700 8,710 9,540 13,300 24,800 68,100
6 62,100 47,300 47,000 39,000 29,900 23,600 11,300 8,630 9,770 13,200 25,400 66,700
7 62,100 49,000 46,700 39,800 29,500 24,600 10,900 8,620 9,640 13,400 27,200 66,200
8 61,600 51,600 46,000 40,100 28,900 24,900 10,800 8,850 9,710 13,200 28,600 65,500
9 62,300 53,400 45,000 40,600 28,400 24,200 10,500 8,740 10,100 13,500 28,700 64,200
10 63,500 52,600 45,600 40,800 27,800 23,300 10,500 8,610 10,100 13,700 29,300 63,700
11 66,000 49,200 46,000 41,200 27,700 22,500 10,200 8,500 10,300 14,100 30,300 63,800
12 66,400 46,900 46,100 41,400 27,600 21,500 10,000 8,570 10,500 14,100 30,800 63,400
13 68,800 46,800 46,500 40,600 27,200 20,400 9,830 8,630 10,600 14,100 31,900 64,000
14 70,700 47,000 46,800 40,800 26,200 19,800 9,790 8,570 10,600 14,400 33,200 66,100
15 71,300 48,000 47,800 40,200 26,400 18,900 9,730 8,350 10,800 14,500 34,800 66,500
16 72,700 49,000 49,200 39,100 26,200 18,100 9,590 8,490 10,800 14,400 36,400 67,600
17 73,600 51,600 48,900 38,200 26,800 17,500 9,550 8,610 11,100 14,700 37,400 68,400
18 74,000 53,800 48,000 36,900 27,500 17,000 9,500 8,650 11,300 15,000 38,800 67,600
19 74,600 56,300 46,800 36,100 27,700 16,500 9,460 8,570 11,700 15,400 40,000 66,000
20 73,000 57,700 45,400 34,400 28,000 15,900 9,460 8,640 11,900 16,200 42,600 64,500
21 70,000 58,000 44,200 33,700 27,300 15,700 9,270 8,740 11,800 16,600 45,400 65,100
22 66,800 57,000 43,200 33,400 26,800 15,400 9,230 8,710 11,900 17,500 48,300 65,700
23 64,800 56,000 43,300 33,000 26,200 14,800 9,140 8,800 11,800 18,100 50,600 65,100
24 63,500 54,900 43,900 33,100 25,600 14,400 8,980 8,750 12,000 17,900 52,400 63,800
25 63,500 54,200 44,400 34,400 25,000 13,900 8,990 8,890 11,800 17,600 54,400 63,200
26 62,700 52,300 43,400 35,000 24,600 13,700 8,720 8,990 11,900 18,500 57,100 61,900
27 61,000 50,800 42,700 35,000 24,300 13,300 8,880 9,080 11,900 18,900 57,800 62,000
28 59,300 49,200 42,700 34,800 24,300 13,200 8,620 9,030 12,100 19,300 58,800 64,300
29 58,400 49,400 43,000 33,300 23,900 13,000 8,620 8,950 12,200 20,400 58,000 66,600
30 57,700   44,200 32,000 23,800 12,800 8,750 8,940 12,800 21,200 56,800 69,900
31 56,500   44,600   23,500   8,630 8,840   22,400   70,600