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USGS Surface-Water Daily Statistics for Illinois

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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 05567500 MACKINAW RIVER NEAR CONGERVILLE, IL


Woodford County, Illinois
Hydrologic Unit Code 07130004
Latitude  40°37'24.6", Longitude  89°14'30.0" NAD83
Drainage area 767  square miles
Gage datum 606.77 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
1 736 470 698 1,140 1,360 952 585 163 97 164 376 381
2 613 478 700 1,100 1,330 1,020 499 153 123 164 331 449
3 515 477 702 1,040 1,060 1,030 479 183 172 250 335 467
4 537 518 909 1,000 868 761 410 217 181 494 297 745
5 683 600 1,080 956 804 702 370 182 161 330 268 441
6 671 602 957 1,070 804 642 387 239 137 214 238 369
7 540 606 930 1,040 820 655 355 256 149 196 211 379
8 490 516 894 951 882 724 337 262 171 187 188 390
9 579 521 875 919 988 683 676 241 156 169 177 376
10 543 621 984 907 988 613 686 233 153 152 202 354
11 505 574 1,230 958 1,010 650 627 188 149 149 219 371
12 492 591 1,290 1,080 1,130 725 475 139 126 139 229 410
13 570 655 1,100 1,120 1,090 809 424 137 136 138 251 405
14 713 643 1,020 1,070 1,270 866 415 128 418 147 279 392
15 621 597 1,020 1,050 1,210 833 377 185 675 158 287 405
16 500 547 982 1,070 1,070 821 499 260 509 156 282 417
17 422 623 915 1,070 1,060 738 466 222 332 211 292 394
18 382 732 929 1,160 1,130 758 435 144 211 228 305 362
19 361 824 1,000 1,070 1,150 919 337 132 213 234 383 325
20 413 766 1,040 1,080 951 1,110 392 120 192 190 437 308
21 446 858 971 1,070 836 1,070 326 126 152 158 283 323
22 460 952 911 1,110 770 1,090 305 105 177 143 257 378
23 515 1,050 950 1,130 769 1,010 324 95 215 173 266 405
24 592 1,030 942 1,060 830 840 278 124 322 210 252 439
25 617 960 910 1,080 838 771 254 123 365 264 259 522
26 600 798 845 1,140 904 724 302 119 267 249 278 548
27 557 798 792 1,060 1,000 695 270 99 205 253 316 559
28 561 781 887 1,050 1,040 689 244 95 205 231 484 538
29 467 505 994 1,010 993 699 222 110 201 215 452 827
30 462   1,020 1,210 899 669 206 119 178 290 397 858
31 486   1,140   935   194 127   373   788