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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 14243000 COWLITZ RIVER AT CASTLE ROCK, WA


Cowlitz County, Washington
Hydrologic Unit Code 17080005
Latitude  46°16'30", Longitude 122°54'48" NAD27
Drainage area 2,238  square miles
Gage datum 0.00 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 1926-10-01 -> 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 13,300 14,200 11,700 11,100 10,100 9,660 7,290 3,820 2,960 3,600 6,850 14,200
2 13,800 13,500 11,300 11,000 10,100 9,700 6,950 3,660 3,000 3,610 6,990 15,400
3 14,200 12,900 11,200 10,500 10,200 9,730 6,690 3,610 3,010 3,760 7,340 15,900
4 14,200 12,800 11,100 10,300 10,200 9,790 6,360 3,470 3,040 4,040 7,510 16,000
5 14,600 12,700 11,100 10,400 10,300 9,950 6,160 3,420 3,130 3,980 7,830 15,300
6 14,800 13,200 11,300 10,200 10,600 9,840 6,090 3,420 3,150 3,920 8,320 15,200
7 15,100 13,900 10,800 10,300 10,400 10,100 6,000 3,380 3,060 3,910 8,890 14,700
8 15,200 14,200 10,500 10,300 10,300 10,300 5,900 3,330 3,030 3,950 8,960 13,900
9 14,600 13,700 10,800 10,200 10,100 10,400 5,980 3,330 3,000 4,180 8,890 14,300
10 14,500 13,400 11,200 10,200 10,100 10,400 5,880 3,280 3,020 4,470 8,680 15,300
11 14,100 12,900 11,200 10,100 10,100 10,200 5,690 3,260 3,070 4,560 8,840 15,400
12 14,400 12,800 11,200 10,200 10,100 9,810 5,550 3,230 3,040 4,530 9,340 15,800
13 14,900 12,500 11,200 10,200 10,300 9,620 5,470 3,160 2,930 4,450 10,100 15,900
14 15,300 12,100 11,100 10,400 10,400 9,560 5,410 3,190 2,940 4,460 10,400 15,200
15 15,300 12,200 11,200 10,500 10,400 9,540 5,380 3,150 3,020 4,410 10,500 14,900
16 15,400 12,600 11,100 10,400 10,400 9,640 5,300 3,170 3,060 4,440 10,700 14,900
17 15,000 12,800 10,800 10,300 10,300 9,640 5,160 3,180 3,020 4,420 11,000 14,600
18 15,000 12,400 10,700 10,400 10,400 9,440 4,900 3,140 3,080 4,530 11,500 14,700
19 14,800 12,600 10,800 10,300 10,500 9,210 4,790 3,070 3,040 4,720 11,800 14,400
20 14,600 12,800 10,700 10,400 10,400 9,240 4,700 3,050 3,020 5,050 12,200 15,000
21 14,400 12,600 10,500 10,300 10,700 9,230 4,600 3,030 3,040 5,140 12,300 15,600
22 14,200 13,000 10,700 10,200 10,600 8,950 4,510 3,020 3,030 5,320 12,300 15,700
23 14,300 12,900 10,600 10,200 10,500 8,720 4,410 3,000 3,060 5,680 12,900 16,100
24 15,100 13,000 10,600 10,300 10,300 8,540 4,380 3,020 3,090 5,770 14,400 15,300
25 15,200 12,600 10,700 10,100 10,300 8,350 4,320 3,020 3,060 6,070 15,600 14,400
26 14,400 12,500 10,400 9,890 10,300 8,160 4,220 3,020 3,070 6,320 15,100 14,000
27 13,600 12,400 10,400 9,860 10,400 8,000 4,100 3,010 3,220 6,070 14,600 14,500
28 13,700 12,200 10,500 10,000 10,400 7,830 4,070 2,990 3,280 6,280 14,500 14,600
29 13,700 14,300 10,700 10,100 10,200 7,660 4,040 3,010 3,490 6,770 14,100 14,500
30 13,800   10,900 10,000 10,100 7,510 4,040 3,000 3,470 6,640 13,900 14,700
31 14,000   11,100   9,780   3,960 2,960   6,510   13,900