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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 14206241 TUALATIN RIVER AT HWY 219 NEAR HILLSBORO, OR


Washington County, Oregon
Hydrologic Unit Code 17090010
Latitude  45°30'01", Longitude 122°59'24" NAD27
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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 2020-10-01 -> 2023-09-30)

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 2,820 716 2,450 575 1,280 626 269 178 137 142 229 1,260
2 2,670 669 2,880 541 1,190 565 275 181 141 140 242 1,100
3 2,710 644 3,110 524 1,170 535 281 165 137 138 205 830
4 2,990 620 3,190 713 992 540 278 158 140 129 238 683
5 3,180 583 3,130 1,310 888 650 274 162 142 121 858 620
6 3,220 563 2,990 1,210 1,020 801 275 165 137 121 1,070 585
7 3,320 546 2,790 1,050 1,460 681 278 164 134 124 864 618
8 3,580 526 2,510 944 1,820 568 272 158 135 124 862 618
9 4,130 500 2,140 857 1,870 559 254 157 132 122 861 656
10 4,810 476 1,620 789 1,790 608 183 148 142 122 836 994
11 5,190 465 1,190 990 1,570 798 177 148 146 119 849 1,520
12 5,050 448 965 1,440 1,360 854 169 149 151 121 1,130 1,990
13 4,720 435 949 1,570 1,340 704 192 152 155 121 1,390 2,550
14 4,270 424 1,180 1,630 1,470 618 196 154 148 126 1,450 2,740
15 3,870 429 1,160 1,630 1,720 578 179 160 149 131 1,450 2,860
16 3,510 410 1,180 1,570 1,870 552 174 154 148 132 1,400 2,910
17 3,220 387 1,130 1,500 1,820 522 183 144 144 136 1,320 2,890
18 3,010 366 1,030 1,420 1,660 534 185 139 150 130 1,180 2,800
19 2,860 358 957 1,510 1,550 520 178 143 188 133 996 2,820
20 2,720 349 928 1,550 1,420 499 159 145 186 132 887 2,980
21 2,570 360 900 1,730 1,250 455 158 145 147 147 772 3,130
22 2,350 388 1,170 1,900 1,110 391 165 151 132 164 659 3,190
23 2,040 363 1,180 1,940 967 362 170 147 134 197 637 3,190
24 1,680 331 1,110 1,940 869 331 168 134 133 226 714 3,160
25 1,430 316 1,010 1,890 783 343 164 127 141 277 622 3,150
26 1,270 309 904 1,750 716 335 158 127 145 288 569 3,150
27 1,110 360 833 1,530 698 317 163 134 134 303 583 3,150
28 911 933 772 1,330 701 291 169 147 139 244 648 3,110
29 777   725 1,160 794 276 169 148 157 244 753 3,080
30 713   671 1,170 811 279 168 138 153 378 847 3,020
31 716   609   721   168 136   282   2,930