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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 12020000 CHEHALIS RIVER NEAR DOTY, WA


Lewis County, Washington
Hydrologic Unit Code 17100103
Latitude  46°37'03", Longitude 123°16'35" NAD27
Drainage area 113  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 1939-10-01 -> 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 1,020 1,210 960 792 406 183 98 46 48 121 553 1,210
2 1,130 1,130 895 711 382 204 95 45 56 125 568 1,400
3 1,160 1,060 952 680 386 192 90 46 50 130 587 1,720
4 1,180 1,050 923 698 385 182 86 44 65 153 713 1,470
5 1,290 973 914 698 402 178 82 43 59 132 579 1,320
6 1,440 1,140 850 666 393 168 80 43 55 147 662 1,190
7 1,670 1,210 808 634 363 177 76 44 53 138 746 1,100
8 1,400 1,240 802 647 326 168 76 44 52 150 651 1,030
9 1,350 1,180 980 648 299 169 81 42 56 208 571 1,150
10 1,180 1,070 1,070 633 285 174 79 40 60 222 614 1,230
11 1,170 943 999 651 273 166 76 38 66 217 702 1,310
12 1,310 991 977 658 265 184 74 38 55 206 902 1,370
13 1,310 1,030 925 660 270 164 74 39 51 201 883 1,370
14 1,370 1,000 938 647 270 156 72 38 54 198 1,110 1,250
15 1,370 1,040 1,020 622 261 152 71 39 64 204 1,030 1,370
16 1,340 1,250 942 585 272 152 68 40 73 220 968 1,360
17 1,280 1,310 877 576 276 147 69 38 91 270 1,020 1,260
18 1,370 1,160 882 520 260 138 66 37 89 288 1,030 1,240
19 1,330 1,180 912 509 251 133 63 37 87 328 1,170 1,210
20 1,280 1,120 864 544 244 125 60 38 100 342 1,250 1,410
21 1,180 1,070 845 489 231 119 57 38 89 363 1,120 1,320
22 1,030 1,100 883 453 223 115 56 41 74 399 1,200 1,240
23 1,120 1,020 885 565 216 113 54 45 89 366 1,220 1,170
24 1,300 1,120 886 519 209 110 53 49 92 350 1,460 1,130
25 1,360 1,050 814 447 195 113 51 52 81 380 1,410 1,100
26 1,160 939 770 415 188 106 49 53 82 395 1,200 1,190
27 1,130 900 805 434 185 104 49 48 91 465 1,170 1,300
28 1,220 960 800 426 190 101 48 49 111 447 1,100 1,260
29 1,190 1,170 922 408 188 106 48 50 128 461 1,070 1,160
30 1,230   933 413 182 99 46 58 156 492 1,100 1,230
31 1,160   854   181   46 50   579   1,050