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USGS Daily Statistics for California

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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 11526400 TRINITY R AB NF TRINITY R NR HELENA CA


Trinity County, California
Hydrologic Unit Code 18010211
Latitude  40°46'00", Longitude 123°06'48" NAD27
Drainage area 1,137  square miles
Gage datum 1,356.59 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 2004-10-01 -> 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 1,270 1,310 1,250 1,410 3,820 2,840 1,420 591 712 502 473 596
2 1,100 1,410 1,310 1,380 3,950 2,770 1,370 578 726 498 487 800
3 995 1,380 1,280 1,350 4,120 2,720 1,330 567 758 499 449 624
4 1,130 1,300 1,240 1,350 4,340 2,690 1,300 556 726 511 474 663
5 1,150 1,450 1,250 1,400 4,580 2,590 1,270 543 757 511 442 726
6 1,040 1,650 1,570 1,460 4,750 2,520 1,230 539 756 506 482 660
7 1,030 1,870 1,430 1,650 4,710 2,470 1,200 542 720 499 504 639
8 1,370 1,520 1,280 1,600 4,560 2,380 1,160 536 688 498 470 623
9 1,480 1,800 1,280 1,500 4,510 2,230 1,120 531 713 499 457 613
10 1,400 1,610 1,430 1,440 4,480 2,170 1,080 530 757 515 448 721
11 1,450 1,380 1,360 1,530 4,380 2,110 1,020 528 708 514 442 832
12 1,380 1,240 1,350 1,760 4,190 2,050 979 524 674 503 446 726
13 1,580 1,230 1,440 1,780 4,130 2,010 934 524 678 505 453 745
14 1,710 1,320 1,690 1,640 4,240 2,000 887 545 660 531 477 829
15 1,500 1,290 1,640 1,650 4,150 1,940 853 542 659 523 455 982
16 1,400 1,270 1,580 1,790 4,040 1,880 833 544 656 492 471 780
17 1,780 1,170 1,450 2,160 3,860 1,870 821 595 747 425 444 692
18 1,780 1,200 1,350 2,440 3,860 1,810 801 624 792 394 446 680
19 1,700 1,230 1,360 2,290 4,050 1,780 776 598 769 439 460 904
20 1,700 1,380 1,500 2,320 3,900 1,710 754 577 714 399 522 953
21 1,700 1,360 1,550 2,350 3,630 1,680 736 671 701 385 540 997
22 1,660 1,290 1,440 2,550 3,520 1,640 716 710 682 427 523 1,090
23 1,510 1,240 1,350 2,760 3,480 1,640 691 660 591 422 496 984
24 1,400 1,200 1,390 2,870 3,440 1,610 679 711 533 545 485 852
25 1,350 1,170 1,380 2,870 3,390 1,570 667 711 512 486 458 795
26 1,360 1,260 1,340 3,020 3,270 1,570 652 816 506 462 459 820
27 1,280 1,890 1,380 3,370 3,150 1,550 653 860 501 457 481 1,050
28 1,260 1,450 1,510 3,400 3,090 1,540 649 787 492 445 468 1,380
29 1,310 1,080 1,470 3,720 3,030 1,500 642 817 498 452 494 1,180
30 1,270   1,520 3,920 2,970 1,440 615 807 534 467 603 1,520
31 1,190   1,470   2,920   594 739   458   1,870