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USGS Surface-Water Daily Statistics for the Nation

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 05451500 Iowa River at Marshalltown, IA


Marshall County, Iowa
Hydrologic Unit Code 07080208
Latitude  42°03'57", Longitude  92°54'27" NAD27
Drainage area 1,532  square miles
Gage datum 852.94 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 1902-10-01 -> 2024-09-30)

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
1 450 352 992 2,040 1,410 2,000 1,890 708 584 682 617 465
2 425 381 1,020 1,900 1,470 2,100 1,750 715 542 675 612 462
3 399 377 1,070 1,830 1,500 2,070 1,620 664 531 691 583 454
4 375 367 1,210 1,790 1,520 2,180 1,540 611 512 701 574 442
5 386 382 1,320 1,750 1,540 2,120 1,420 587 481 672 570 438
6 444 396 1,300 1,710 1,550 1,910 1,330 563 485 697 560 449
7 408 417 1,340 1,630 1,560 1,830 1,250 551 466 643 562 433
8 379 403 1,290 1,540 1,570 1,810 1,230 547 526 636 551 421
9 353 410 1,270 1,520 1,570 1,990 1,410 557 541 653 558 403
10 338 436 1,300 1,500 1,530 2,000 1,490 571 522 656 552 400
11 317 457 1,380 1,470 1,450 1,880 1,330 568 496 682 553 393
12 310 425 1,510 1,500 1,430 1,870 1,260 594 498 711 565 386
13 303 455 1,680 1,560 1,510 2,140 1,180 540 498 675 552 413
14 290 484 1,820 1,540 1,530 2,120 1,140 516 526 650 531 478
15 280 505 1,870 1,560 1,460 2,070 1,100 534 516 636 526 521
16 287 613 1,870 1,590 1,430 2,080 990 606 536 610 520 484
17 298 631 1,880 1,620 1,410 2,090 957 633 557 578 521 447
18 314 716 1,780 1,660 1,420 2,040 1,020 547 514 562 516 421
19 317 837 1,960 1,610 1,530 2,050 999 505 556 553 516 402
20 324 1,000 2,040 1,530 1,660 2,020 986 573 648 544 526 387
21 341 1,030 1,950 1,500 1,590 1,970 918 614 701 538 521 381
22 353 970 1,790 1,430 1,550 2,140 862 613 634 571 515 374
23 350 987 1,730 1,440 1,610 2,220 823 607 633 613 509 369
24 332 1,040 1,720 1,430 1,620 2,160 808 586 637 606 497 377
25 318 977 1,770 1,420 1,660 2,050 783 564 651 577 479 383
26 316 948 1,760 1,520 1,750 1,910 795 639 712 549 469 394
27 317 960 1,860 1,580 1,930 1,800 816 669 714 528 475 404
28 322 1,070 1,820 1,490 1,950 1,820 848 643 709 513 480 464
29 302 1,040 1,810 1,400 1,930 1,800 788 643 681 509 477 458
30 309   1,800 1,400 2,070 1,860 736 682 702 540 468 441
31 340   2,000   2,060   708 631   588   465