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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 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
1 609 406 560 767 1,070 703 488 151 111 124 253 336
2 500 426 575 770 1,020 690 397 108 125 144 239 389
3 415 420 551 753 847 649 351 110 121 188 254 373
4 464 395 639 765 711 578 329 164 92 233 233 423
5 544 488 765 724 664 561 327 197 67 187 210 381
6 545 503 773 749 671 580 325 178 73 137 194 342
7 480 487 678 732 677 574 329 156 104 123 165 315
8 464 428 682 668 724 577 300 154 102 140 144 355
9 484 425 730 699 788 589 375 142 131 133 130 342
10 464 459 826 706 838 590 456 114 154 125 141 295
11 497 454 928 703 876 632 486 113 158 121 186 302
12 510 450 908 850 948 607 498 95 120 130 200 430
13 512 451 816 859 976 634 534 95 98 125 207 459
14 513 489 842 832 1,070 668 524 79 170 145 231 382
15 516 455 872 842 1,040 624 503 112 270 154 249 358
16 441 414 844 822 934 614 416 175 242 146 255 355
17 349 464 796 805 876 607 330 132 171 203 251 331
18 305 563 836 763 947 579 354 96 129 235 268 306
19 301 585 850 774 931 616 435 105 131 214 351 259
20 356 617 836 783 820 625 350 163 115 169 345 247
21 371 744 803 766 693 670 288 214 89 139 290 254
22 369 870 753 779 632 795 279 151 88 131 245 356
23 378 919 723 868 626 755 301 113 124 164 255 394
24 445 825 718 835 609 655 277 116 151 205 275 375
25 458 712 678 859 606 634 239 106 152 248 282 433
26 409 611 637 919 720 634 217 96 154 255 282 469
27 381 618 612 927 750 640 198 104 132 236 334 462
28 374 601 686 921 712 619 186 116 116 189 397 530
29 357 368 817 874 726 602 196 97 101 173 388 617
30 352   829 938 690 555 174 96 114 225 330 658
31 381   796   672   207 99   280   663