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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 -> 2023-09-30)

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
1 828 674 1,040 1,140 1,080 888 748 212 189 209 280 536
2 799 673 1,010 1,140 1,080 891 695 190 203 207 299 534
3 802 666 989 1,130 1,030 869 662 184 206 207 322 532
4 812 664 1,020 1,160 977 801 628 180 191 224 321 522
5 820 711 1,110 1,150 925 768 594 172 176 219 315 510
6 823 736 1,110 1,140 859 784 546 165 168 213 313 495
7 803 707 1,080 1,130 824 793 499 171 166 210 301 495
8 796 671 1,070 1,090 820 807 493 173 159 205 282 507
9 785 672 1,080 1,050 818 836 574 162 164 208 267 499
10 732 718 1,110 1,020 825 862 612 160 173 217 254 486
11 711 727 1,180 1,010 831 873 612 157 179 225 264 491
12 713 736 1,190 1,050 863 890 632 153 180 243 281 524
13 719 737 1,180 1,060 929 968 653 157 184 243 285 537
14 725 752 1,180 1,050 970 997 671 153 219 244 295 528
15 710 781 1,170 1,060 981 1,020 646 142 259 242 318 562
16 699 780 1,140 1,070 981 1,010 583 136 260 247 340 593
17 660 823 1,110 1,070 988 968 516 139 248 279 370 581
18 628 878 1,110 1,050 987 935 479 150 237 308 389 557
19 617 922 1,130 1,040 971 899 459 163 227 307 422 530
20 613 947 1,170 1,040 947 866 453 179 211 297 440 503
21 615 1,070 1,170 1,030 919 833 462 187 196 285 437 506
22 627 1,150 1,140 1,010 875 801 485 186 193 289 425 565
23 656 1,190 1,100 1,010 848 771 474 183 200 305 423 590
24 711 1,230 1,080 986 811 748 453 165 209 338 435 596
25 714 1,200 1,040 986 788 736 426 152 209 358 430 623
26 700 1,130 1,040 985 800 736 388 157 204 370 436 635
27 683 1,090 1,040 993 800 747 353 156 200 367 456 653
28 675 1,090 1,090 1,010 810 811 323 152 207 350 489 680
29 671 670 1,120 1,020 823 804 283 163 215 327 512 739
30 684   1,130 1,040 834 778 254 171 210 305 530 785
31 688   1,130   876   239 168   294   830