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USGS Surface-Water 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°49'22", Longitude  87°34'53" NAD27
Drainage area 686  square miles
Gage datum 614.34 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 1944-10-01 -> 2021-09-30)

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
1 825 684 1,010 1,120 1,100 895 756 212 185 213 248 539
2 795 683 978 1,120 1,090 898 702 190 202 211 271 538
3 799 674 960 1,110 1,050 876 669 185 206 211 298 538
4 804 672 984 1,150 989 807 635 180 191 228 302 528
5 814 722 1,070 1,140 936 774 600 172 177 221 301 516
6 821 747 1,070 1,130 864 790 552 165 169 215 302 502
7 805 719 1,050 1,120 822 794 504 171 167 212 293 501
8 799 682 1,040 1,090 807 797 498 172 160 207 277 514
9 789 682 1,050 1,040 800 820 580 159 165 210 263 506
10 737 722 1,090 1,020 811 845 619 159 174 219 251 493
11 718 728 1,170 1,010 825 855 618 156 180 228 261 493
12 721 727 1,180 1,050 864 874 639 153 182 247 279 522
13 728 727 1,180 1,060 936 954 661 157 184 245 283 535
14 735 745 1,190 1,060 980 987 678 154 220 245 294 528
15 721 778 1,170 1,070 991 1,020 653 142 260 244 318 560
16 710 779 1,150 1,080 992 1,010 589 136 262 248 341 587
17 669 802 1,120 1,080 995 971 521 139 250 280 372 577
18 637 849 1,120 1,060 994 940 480 150 239 309 392 555
19 623 893 1,140 1,050 978 904 461 163 229 309 426 530
20 612 921 1,170 1,050 954 873 456 180 213 300 445 503
21 613 1,050 1,170 1,040 926 839 466 189 197 289 443 506
22 627 1,120 1,140 1,020 881 808 490 187 194 293 430 568
23 659 1,140 1,090 1,020 854 778 478 184 202 309 428 595
24 718 1,170 1,060 997 817 754 443 166 211 344 440 601
25 723 1,140 1,020 993 794 742 407 153 210 350 435 630
26 708 1,080 1,010 991 806 742 369 158 206 346 442 642
27 692 1,050 1,020 1,000 805 754 338 157 202 334 460 660
28 684 1,050 1,070 1,020 814 819 314 153 209 315 485 687
29 681 670 1,110 1,030 827 812 280 164 219 292 508 740
30 694   1,120 1,050 838 786 252 170 214 269 529 784
31 698   1,120   882   239 163   258   828