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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 12442500 SIMILKAMEEN RIVER NEAR NIGHTHAWK, WA


Okanogan County, Washington
Hydrologic Unit Code 17020007
Latitude  48°59'05", Longitude 119°37'02" NAD27
Drainage area 3,550  square miles
Gage datum 1,137.70 feet above NGVD29
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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 1928-10-01 -> 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
1 699 689 719 1,060 4,450 10,600 4,930 1,290 630 562 895 1,050
2 683 706 704 1,090 4,640 10,600 4,760 1,230 624 581 863 1,050
3 665 720 704 1,140 4,840 10,600 4,600 1,190 622 578 876 1,010
4 658 731 698 1,180 5,020 10,500 4,470 1,160 618 583 892 1,010
5 681 728 691 1,210 5,290 10,400 4,290 1,120 607 593 946 1,030
6 686 725 694 1,240 5,640 10,300 4,110 1,090 594 597 977 966
7 670 734 698 1,280 5,900 10,100 3,960 1,050 596 584 1,030 916
8 682 733 698 1,360 6,170 9,880 3,840 1,020 594 584 1,030 864
9 716 727 700 1,470 6,470 9,620 3,680 983 576 587 999 838
10 716 723 707 1,550 6,740 9,420 3,510 948 565 603 1,020 854
11 705 717 713 1,590 7,020 9,320 3,350 918 559 609 1,110 859
12 688 723 721 1,650 7,340 9,090 3,190 887 555 626 999 886
13 678 721 781 1,710 7,740 8,890 3,060 860 553 635 1,010 867
14 673 717 782 1,810 8,020 8,820 2,920 846 546 632 1,030 834
15 666 719 784 1,920 8,240 8,650 2,790 840 548 643 1,110 823
16 660 711 796 1,990 8,520 8,520 2,660 826 557 650 1,210 809
17 671 709 800 2,080 8,830 8,360 2,550 817 566 664 1,120 805
18 680 707 809 2,190 9,080 8,090 2,440 798 569 695 1,050 788
19 675 706 821 2,340 9,140 7,750 2,340 775 568 705 1,030 768
20 696 710 837 2,500 9,300 7,470 2,230 758 563 702 990 768
21 688 708 853 2,660 9,550 7,290 2,120 739 563 759 968 763
22 682 703 863 2,860 9,670 7,120 2,030 722 564 785 930 754
23 672 698 869 3,050 9,780 6,920 1,930 712 564 762 935 738
24 687 692 878 3,230 9,910 6,640 1,850 703 554 746 1,020 723
25 705 688 892 3,390 10,100 6,300 1,780 701 549 769 1,040 718
26 711 697 907 3,510 10,300 5,960 1,700 695 547 849 1,020 711
27 692 714 916 3,650 10,400 5,690 1,610 681 547 859 1,020 801
28 674 770 929 3,830 10,500 5,470 1,530 666 550 836 1,040 786
29 674 855 954 4,030 10,600 5,300 1,470 653 550 861 1,050 734
30 683   984 4,220 10,600 5,180 1,420 643 559 868 1,100 707
31 686   1,020   10,600   1,350 635   853   703