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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 03612000 CACHE RIVER AT FORMAN, IL


Johnson County, Illinois
Hydrologic Unit Code 05140206
Latitude  37°20'06", Longitude  88°55'31" NAD83
Drainage area 244  square miles
Gage datum 307.74 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 1922-10-01 -> 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
1 548 501 607 738 661 233 237 68 70 54 129 320
2 522 547 541 692 710 270 193 77 70 56 148 285
3 523 554 555 686 710 296 172 69 82 52 123 285
4 514 500 600 733 660 244 182 67 77 45 130 296
5 532 459 617 740 587 208 168 70 66 41 139 311
6 508 462 599 768 544 182 137 75 61 50 142 323
7 444 449 623 702 527 181 146 72 46 39 135 308
8 403 432 606 628 507 157 148 59 39 41 138 284
9 422 407 601 588 472 170 140 49 39 58 134 270
10 410 424 619 546 449 164 148 57 34 54 148 273
11 429 416 642 539 451 188 164 63 31 46 139 257
12 408 417 715 567 435 197 149 62 50 47 126 276
13 448 452 687 558 413 200 120 61 44 61 132 277
14 484 479 659 630 452 211 84 65 48 73 130 314
15 536 522 602 635 492 210 68 78 50 67 148 381
16 528 585 556 643 487 194 89 74 37 60 179 359
17 454 590 544 598 477 193 79 82 29 82 189 371
18 447 577 592 557 490 213 82 104 28 93 212 390
19 463 535 794 537 469 217 104 103 27 79 240 380
20 501 507 907 515 400 208 108 89 30 61 226 344
21 535 500 804 514 355 217 97 74 38 58 208 347
22 654 554 709 515 324 274 94 60 44 51 215 379
23 691 560 654 551 316 273 94 73 63 51 264 403
24 679 578 583 562 344 270 74 83 76 58 255 430
25 681 670 540 590 324 232 55 81 87 50 236 430
26 666 636 557 570 357 215 50 71 93 46 251 432
27 582 630 545 524 395 215 51 61 91 58 286 419
28 531 645 575 490 380 204 60 54 78 70 322 447
29 429 361 612 494 335 218 51 60 65 87 310 477
30 432   647 529 293 234 39 68 59 94 324 470
31 497   708   268   51 58   96   521