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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 05525000 IROQUOIS RIVER AT IROQUOIS, IL


Iroquois County, Illinois
Hydrologic Unit Code 07120002
Latitude  40°49'23", Longitude  87°34'54" NAD83
Drainage area 686  square miles
Gage datum 614.13 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 1944-10-01 -> 2024-09-30)

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
1 830 704 1,040 1,140 1,080 879 739 210 187 207 279 531
2 798 698 1,010 1,140 1,080 882 688 188 201 205 298 529
3 800 686 989 1,130 1,030 861 657 183 204 205 320 529
4 808 680 1,020 1,160 977 793 623 178 189 222 319 519
5 815 723 1,110 1,150 925 760 588 171 174 216 313 507
6 817 743 1,110 1,140 859 776 541 179 167 211 311 493
7 798 712 1,080 1,130 824 785 494 192 164 208 298 492
8 791 674 1,070 1,090 820 799 487 198 158 203 280 503
9 781 673 1,080 1,050 818 827 568 185 162 206 265 495
10 740 717 1,110 1,020 825 853 605 180 171 214 253 483
11 722 726 1,180 1,010 831 863 605 172 177 223 262 487
12 724 736 1,190 1,050 863 881 625 161 179 241 279 520
13 738 737 1,180 1,060 929 957 646 161 182 240 283 533
14 743 752 1,180 1,050 970 986 663 155 217 241 293 523
15 723 781 1,170 1,060 981 1,010 639 143 256 240 315 557
16 707 780 1,140 1,070 981 996 578 137 257 245 337 588
17 663 823 1,110 1,070 982 957 512 139 245 277 367 577
18 630 878 1,110 1,050 980 924 474 150 234 305 386 554
19 617 922 1,130 1,040 964 888 454 162 225 304 419 528
20 612 947 1,170 1,040 940 856 448 179 209 294 436 501
21 613 1,070 1,170 1,030 912 823 457 186 194 282 434 503
22 624 1,150 1,140 1,010 868 792 480 185 191 286 422 561
23 653 1,190 1,100 1,010 841 763 468 181 198 302 420 587
24 709 1,230 1,080 986 804 739 448 164 207 335 432 595
25 715 1,200 1,040 986 781 727 421 151 206 355 427 623
26 706 1,130 1,040 985 793 727 383 156 202 366 433 634
27 703 1,090 1,040 993 793 739 349 155 198 363 452 653
28 713 1,090 1,090 1,010 803 802 319 151 205 347 484 679
29 712 670 1,120 1,020 815 795 280 162 212 324 507 743
30 722   1,130 1,040 826 769 251 169 208 303 525 791
31 723   1,130   867   236 166   292   834