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USGS 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 05554500 VERMILION RIVER AT PONTIAC, IL


Livingston County, Illinois
Hydrologic Unit Code 07130002
Latitude  40°52'40", Longitude  88°38'10" NAD27
Drainage area 579  square miles
Gage datum 619.45 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 1942-10-01 -> 2022-09-30)

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
1 608 402 561 802 1,070 703 488 151 111 124 253 334
2 499 423 576 786 1,020 690 397 108 125 144 239 387
3 415 418 552 761 847 649 351 110 121 188 254 370
4 463 392 639 769 711 578 329 164 92 233 233 419
5 541 484 762 724 664 561 327 197 67 187 210 378
6 541 498 770 749 671 580 325 178 73 137 194 339
7 476 483 676 732 677 574 329 156 104 123 165 314
8 460 424 683 668 724 577 300 154 102 140 144 353
9 480 421 729 699 788 589 375 142 131 133 130 340
10 460 455 822 706 838 590 456 114 154 125 141 294
11 493 450 922 703 876 632 486 113 158 121 186 309
12 506 452 901 850 948 607 498 95 120 130 200 442
13 508 459 810 859 976 634 534 95 98 125 207 465
14 509 492 836 832 1,070 668 524 79 170 145 231 385
15 512 453 865 842 1,040 624 503 112 270 154 249 360
16 438 412 837 822 934 614 416 175 242 146 255 356
17 347 502 789 805 876 607 330 132 171 203 251 332
18 303 616 829 763 947 579 354 96 129 235 268 307
19 299 609 846 774 931 616 435 105 131 214 351 261
20 352 627 837 783 820 625 350 163 115 169 345 249
21 368 750 803 766 693 670 288 214 89 139 290 255
22 366 902 751 779 632 795 279 151 88 131 245 356
23 374 958 723 868 626 755 301 113 124 164 255 393
24 441 841 725 835 609 655 277 116 151 205 275 374
25 454 718 687 859 606 634 239 106 152 248 282 431
26 405 614 646 919 720 634 217 96 154 255 282 466
27 377 619 617 927 750 640 198 104 132 236 334 459
28 371 601 686 921 712 619 186 116 116 189 397 528
29 354 368 814 874 726 602 196 97 101 173 388 619
30 349   826 938 690 555 174 96 114 225 328 662
31 377   823   672   207 99   280   663