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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 05555300 VERMILION RIVER NEAR LEONORE, IL


Lasalle County, Illinois
Hydrologic Unit Code 07130002
Latitude  41°12'30", Longitude  88°55'50" NAD83
Drainage area 1,251  square miles
Gage datum 521.14 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 1971-10-01 -> 2025-09-30)

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 1,560 884 1,420 1,990 2,410 1,800 1,150 354 323 318 765 915
2 1,260 879 1,400 1,930 2,440 1,830 971 267 307 339 752 1,070
3 1,010 1,010 1,420 1,860 2,060 1,560 888 213 435 414 752 1,270
4 1,070 1,130 1,570 1,740 1,700 1,360 791 191 325 640 677 1,370
5 1,250 1,200 2,110 1,600 1,430 1,340 794 193 225 626 611 1,170
6 1,170 1,170 2,070 1,650 1,340 1,520 743 276 212 424 563 977
7 1,010 1,160 1,950 1,590 1,630 1,340 778 313 306 387 476 946
8 1,000 1,080 1,920 1,530 1,680 1,430 733 306 404 352 411 945
9 1,140 1,070 2,050 1,570 1,780 1,340 658 280 448 354 367 886
10 1,100 1,030 2,270 1,610 1,910 1,280 721 252 505 302 404 785
11 1,160 875 2,530 1,670 1,900 1,270 752 245 489 305 450 746
12 1,200 971 2,220 2,080 1,960 1,240 872 251 388 302 476 1,040
13 1,310 1,020 2,000 2,210 2,040 1,310 1,080 230 368 324 508 1,040
14 1,330 1,060 2,070 2,110 2,220 1,420 998 212 700 361 569 1,030
15 1,230 963 2,120 1,920 2,460 1,350 817 353 1,010 369 562 1,030
16 1,050 863 1,960 1,880 2,160 1,290 716 437 840 338 614 1,020
17 866 1,130 1,920 1,830 1,760 1,200 611 413 561 412 609 970
18 742 1,400 2,120 2,150 1,920 1,200 613 270 565 501 634 899
19 720 1,400 2,280 2,020 1,940 1,320 872 272 404 484 834 775
20 916 1,530 2,100 1,720 1,650 1,410 877 470 337 443 867 690
21 1,010 1,790 1,830 1,630 1,410 1,420 756 527 274 368 746 717
22 955 2,000 1,620 1,680 1,330 1,660 708 440 232 344 612 805
23 902 2,070 1,730 1,740 1,360 1,660 617 427 208 389 581 860
24 994 2,050 1,800 1,630 1,350 1,370 514 458 199 494 572 895
25 1,110 2,010 1,670 1,450 1,360 1,220 508 354 209 633 578 1,100
26 1,140 1,650 1,500 1,680 1,510 1,140 504 345 226 659 634 1,150
27 1,100 1,600 1,370 1,640 1,860 1,150 452 282 243 680 824 1,200
28 1,010 1,510 1,380 1,720 1,970 1,230 405 344 326 575 1,230 1,250
29 861 633 1,550 1,740 1,920 1,220 391 356 304 497 1,200 1,410
30 784   1,940 2,160 1,780 1,220 396 269 284 651 992 1,690
31 860   1,970   1,840   420 250   837   1,630