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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 -> 2019-09-30)

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
1 618 410 545 773 1,010 709 436 153 114 124 201 338
2 507 427 565 778 999 697 367 109 129 146 207 391
3 421 414 541 762 843 655 335 112 125 185 232 376
4 472 387 637 775 710 583 320 168 95 231 218 429
5 554 485 771 734 664 566 323 203 69 187 200 387
6 556 503 782 760 671 586 324 183 74 137 187 347
7 489 490 686 742 678 580 331 160 107 117 159 321
8 473 431 691 677 729 577 299 158 105 111 139 362
9 494 429 741 710 785 588 376 141 135 113 125 348
10 473 464 835 717 799 592 462 112 158 113 137 300
11 462 457 934 715 849 635 493 113 163 115 185 307
12 425 451 917 865 941 613 504 95 124 113 198 439
13 443 453 825 874 980 642 523 80 102 107 206 468
14 480 494 855 847 1,080 677 517 66 175 123 232 389
15 501 460 886 858 1,050 633 502 108 283 129 252 365
16 431 417 857 838 928 623 401 177 250 131 259 362
17 341 470 806 820 852 617 307 134 177 196 255 338
18 297 566 843 777 848 589 339 97 133 233 273 312
19 286 579 836 788 825 627 430 106 136 214 360 264
20 347 617 809 798 735 636 344 167 119 168 353 251
21 368 752 788 781 650 682 284 220 92 139 297 258
22 369 884 748 794 616 810 277 155 91 131 249 364
23 379 936 722 886 618 770 301 115 128 166 259 403
24 448 839 718 851 601 667 278 119 155 206 280 383
25 458 719 678 867 601 614 240 108 157 195 288 443
26 410 602 638 897 715 579 218 96 159 174 288 479
27 382 603 604 918 749 542 199 105 136 149 342 472
28 377 582 678 924 713 504 187 118 118 132 408 542
29 360 340 809 849 727 504 198 99 99 123 398 631
30 355   826 864 690 484 176 98 113 149 336 669
31 385   798   675   209 102   202   671