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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 12021800 CHEHALIS RIVER NEAR ADNA, WA


Lewis County, Washington
Hydrologic Unit Code 17100103
Latitude  46°37'33", Longitude 123°06'02" NAD27
Drainage area 340  square miles
Gage datum 0 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 2015-10-01 -> 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 2,440 2,800 4,130 1,430 781 324 170 70 48 132 1,170 1,570
2 2,500 2,610 3,000 1,280 723 310 169 68 51 118 1,020 1,570
3 4,500 2,250 2,530 1,170 703 390 163 69 53 119 915 1,580
4 3,800 2,020 2,500 1,390 706 386 156 68 51 110 1,570 1,710
5 3,190 2,270 2,140 1,290 759 447 150 65 48 114 2,190 3,010
6 5,270 2,280 1,910 1,210 762 384 145 63 48 135 1,780 2,930
7 7,550 2,290 1,840 1,370 816 355 142 64 51 164 1,860 2,440
8 4,480 2,300 1,820 2,180 757 335 143 64 49 170 1,520 2,840
9 3,470 3,470 1,970 1,910 684 336 140 64 53 217 1,180 3,690
10 3,350 3,090 3,030 1,710 625 437 138 64 66 225 1,070 3,310
11 3,810 2,030 2,360 1,640 584 438 137 63 61 291 1,130 3,670
12 5,860 2,030 2,230 1,630 584 398 131 62 69 440 2,010 3,650
13 6,090 1,810 2,250 1,630 605 374 124 62 69 320 2,390 3,180
14 3,940 1,760 2,380 1,940 587 424 118 60 63 649 3,730 2,450
15 2,870 2,050 2,370 2,280 573 393 113 58 63 669 4,460 1,910
16 2,520 3,060 2,100 1,870 677 444 110 55 81 753 3,280 1,660
17 2,240 2,610 1,770 1,670 700 385 109 53 83 845 3,500 1,920
18 2,960 2,290 1,960 1,460 631 340 109 53 155 770 3,480 3,050
19 3,550 2,120 1,770 1,470 589 309 108 54 145 978 2,350 3,580
20 3,150 2,240 1,570 1,310 548 281 102 53 121 870 2,430 5,950
21 3,220 2,150 1,500 1,240 498 263 97 52 103 823 2,110 5,450
22 3,570 2,500 1,450 1,170 479 244 94 54 85 1,670 2,410 4,280
23 3,700 2,500 1,370 1,100 439 230 92 56 90 816 2,500 3,600
24 4,190 1,950 1,510 1,090 409 222 91 54 180 571 2,960 3,160
25 3,370 1,690 1,530 1,080 393 213 88 52 163 514 3,030 2,820
26 2,830 1,800 1,440 1,020 376 200 85 50 185 705 2,070 2,660
27 3,010 1,730 1,470 937 360 192 81 48 171 753 2,330 3,230
28 3,890 2,840 1,540 875 366 189 78 47 200 846 2,190 2,890
29 3,280 4,470 1,740 826 410 184 76 47 163 1,150 1,810 2,710
30 2,880   1,840 826 371 175 76 45 135 706 1,830 3,240
31 2,560   1,610   348   73 45   984   2,700