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USGS Daily Statistics for the Nation

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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 05435500 PECATONICA RIVER AT FREEPORT, IL


Stephenson County, Illinois
Hydrologic Unit Code 07090003
Latitude  42°18'01", Longitude  89°36'55" NAD83
Drainage area 1,326.88  square miles
Gage datum 742.41 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 1913-10-01 -> 2026-09-30)

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
1 870 814 1,660 1,640 1,180 1,070 1,160 818 762 849 828 810
2 844 824 1,620 1,580 1,200 1,070 1,210 813 741 841 862 803
3 816 839 1,550 1,600 1,200 1,100 1,240 831 739 827 863 799
4 791 828 1,520 1,610 1,180 1,110 1,250 834 746 806 863 786
5 793 848 1,590 1,590 1,140 1,110 1,210 821 747 817 847 786
6 851 898 1,620 1,560 1,100 1,090 1,180 838 765 846 824 777
7 818 920 1,690 1,510 1,100 1,090 1,110 868 766 872 814 767
8 816 950 1,690 1,440 1,110 1,080 1,070 895 766 879 801 757
9 829 1,000 1,670 1,390 1,110 1,080 1,060 919 783 862 797 741
10 818 1,010 1,650 1,330 1,120 1,090 1,070 895 796 835 804 744
11 779 1,020 1,730 1,310 1,120 1,100 1,070 861 795 830 812 735
12 745 1,030 1,770 1,290 1,120 1,130 1,040 821 815 810 806 727
13 751 1,030 1,860 1,250 1,130 1,190 1,020 793 855 794 793 713
14 765 1,040 1,960 1,210 1,140 1,240 1,010 768 889 787 765 715
15 777 1,060 2,070 1,200 1,120 1,240 978 759 930 784 761 732
16 775 1,060 2,180 1,200 1,090 1,230 926 757 983 764 768 757
17 775 1,000 2,150 1,210 1,090 1,220 891 758 956 758 788 774
18 773 972 2,050 1,220 1,070 1,210 891 749 925 781 816 758
19 759 1,020 1,960 1,220 1,060 1,200 919 750 909 793 826 737
20 757 1,160 1,930 1,220 1,060 1,170 946 783 884 786 822 724
21 776 1,330 1,860 1,230 1,060 1,180 967 804 914 776 828 715
22 828 1,420 1,760 1,220 1,060 1,190 994 841 913 767 829 700
23 871 1,530 1,720 1,220 1,080 1,200 1,010 843 885 785 807 691
24 918 1,630 1,730 1,210 1,090 1,190 990 831 859 799 797 709
25 933 1,770 1,780 1,190 1,080 1,190 940 801 864 803 801 732
26 917 1,760 1,770 1,200 1,090 1,200 879 786 887 811 799 740
27 899 1,720 1,780 1,200 1,090 1,180 838 803 919 807 805 772
28 872 1,680 1,820 1,180 1,090 1,160 858 819 907 795 812 829
29 845 1,590 1,780 1,170 1,120 1,140 847 827 874 776 812 841
30 827   1,740 1,170 1,110 1,140 847 814 852 779 815 846
31 816   1,670   1,090   845 782   805   865