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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 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 -> 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
1 870 814 1,660 1,650 1,180 1,070 1,160 815 759 850 830 810
2 844 824 1,620 1,590 1,200 1,080 1,210 810 738 842 863 803
3 816 839 1,550 1,600 1,200 1,100 1,240 828 736 828 865 799
4 791 828 1,520 1,610 1,180 1,110 1,250 832 744 808 865 786
5 793 848 1,590 1,590 1,140 1,110 1,210 820 745 819 848 786
6 851 898 1,620 1,570 1,100 1,090 1,180 838 763 847 826 777
7 818 920 1,690 1,510 1,100 1,090 1,120 868 764 874 816 767
8 816 950 1,690 1,450 1,110 1,080 1,070 895 765 881 803 757
9 829 1,000 1,670 1,390 1,110 1,090 1,060 920 782 864 798 741
10 818 1,010 1,650 1,340 1,120 1,090 1,070 896 795 836 805 744
11 779 1,020 1,730 1,310 1,130 1,110 1,070 860 794 832 814 735
12 745 1,030 1,780 1,290 1,130 1,130 1,040 817 815 812 808 727
13 751 1,030 1,870 1,250 1,130 1,200 1,020 785 855 795 794 713
14 765 1,040 1,970 1,220 1,140 1,250 998 759 889 788 766 715
15 777 1,060 2,080 1,200 1,120 1,250 970 749 931 785 762 732
16 775 1,060 2,190 1,200 1,090 1,230 916 747 984 765 769 757
17 775 1,000 2,160 1,210 1,090 1,230 882 749 957 759 789 774
18 773 972 2,060 1,220 1,070 1,220 884 742 927 782 818 758
19 759 1,020 1,970 1,220 1,060 1,200 914 744 911 794 826 737
20 757 1,160 1,940 1,230 1,060 1,170 942 776 885 786 822 724
21 776 1,330 1,870 1,230 1,070 1,180 964 795 915 777 828 715
22 828 1,420 1,760 1,220 1,060 1,190 992 833 914 768 829 700
23 871 1,530 1,720 1,220 1,080 1,200 1,010 835 886 785 807 691
24 918 1,630 1,730 1,210 1,090 1,190 989 826 860 801 797 709
25 933 1,770 1,790 1,190 1,090 1,190 939 796 865 804 801 732
26 917 1,760 1,770 1,200 1,090 1,200 877 782 888 812 799 740
27 899 1,720 1,780 1,200 1,090 1,180 836 799 920 809 805 772
28 872 1,680 1,820 1,180 1,100 1,150 856 817 908 796 812 829
29 845 1,590 1,790 1,170 1,120 1,140 846 824 875 777 812 841
30 827   1,740 1,180 1,120 1,140 845 811 853 780 815 846
31 816   1,670   1,090   843 780   806   865