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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
1 867 814 1,670 1,650 1,180 1,070 1,160 815 759 850 829 809
2 841 824 1,630 1,590 1,200 1,080 1,210 810 738 842 860 803
3 814 839 1,550 1,600 1,200 1,100 1,240 828 736 828 860 799
4 790 828 1,520 1,610 1,180 1,110 1,250 832 744 808 861 784
5 794 848 1,590 1,590 1,140 1,110 1,210 820 745 819 844 784
6 852 899 1,620 1,570 1,100 1,090 1,180 838 763 847 819 776
7 818 922 1,690 1,510 1,100 1,090 1,120 868 764 874 808 765
8 815 951 1,700 1,450 1,110 1,080 1,070 895 765 881 796 754
9 829 1,000 1,680 1,390 1,110 1,090 1,060 920 782 864 793 738
10 817 1,020 1,660 1,340 1,120 1,090 1,070 896 795 836 801 741
11 778 1,020 1,730 1,310 1,130 1,110 1,070 860 794 832 810 733
12 744 1,040 1,780 1,290 1,130 1,130 1,040 817 815 812 805 726
13 750 1,040 1,870 1,250 1,130 1,200 1,020 785 855 795 791 712
14 764 1,050 1,970 1,220 1,140 1,250 998 759 889 788 763 714
15 776 1,060 2,080 1,200 1,120 1,250 970 749 931 785 759 729
16 774 1,060 2,190 1,200 1,090 1,230 916 747 984 765 766 754
17 774 1,000 2,160 1,210 1,090 1,230 882 749 957 759 785 770
18 772 974 2,060 1,220 1,070 1,220 884 742 927 782 814 754
19 759 1,020 1,970 1,220 1,060 1,200 914 744 911 794 823 735
20 757 1,160 1,940 1,230 1,060 1,170 942 776 885 786 818 722
21 776 1,340 1,870 1,230 1,070 1,180 964 795 915 777 822 713
22 828 1,430 1,760 1,220 1,060 1,190 992 833 914 768 822 699
23 871 1,540 1,720 1,220 1,080 1,200 1,010 835 886 785 801 690
24 919 1,640 1,730 1,210 1,090 1,190 989 826 860 801 792 707
25 935 1,780 1,790 1,190 1,090 1,190 939 796 865 804 797 729
26 918 1,770 1,770 1,200 1,090 1,200 877 782 888 812 796 738
27 900 1,730 1,780 1,200 1,090 1,180 836 799 920 809 802 770
28 873 1,690 1,820 1,180 1,100 1,150 856 817 908 796 809 827
29 846 1,590 1,790 1,170 1,120 1,140 846 824 875 777 809 838
30 827   1,740 1,180 1,120 1,140 845 811 853 780 813 842
31 816   1,670   1,090   843 780   806   860