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USGS Daily Statistics for Iowa

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Boating safety tips are available from the U.S. Coast Guard.

NOTE: Station Numbers for Iowa precipitation gages have changed (see list).


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 853.10 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 97 - 100 years of record in, ft3/s   (Calculation Period 1902-10-01 -> 2018-09-30)

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
1 420 345 965 2,080 1,420 1,960 1,910 729 601 648 599 455
2 399 376 998 1,930 1,480 2,080 1,770 737 557 600 596 443
3 375 369 1,050 1,860 1,510 2,070 1,630 684 546 585 569 431
4 355 343 1,200 1,820 1,520 2,200 1,550 629 454 616 556 421
5 371 364 1,320 1,780 1,540 2,130 1,420 604 424 600 539 419
6 435 388 1,290 1,740 1,550 1,900 1,340 579 421 619 527 433
7 399 413 1,330 1,660 1,570 1,820 1,260 567 397 569 532 420
8 369 400 1,300 1,550 1,570 1,810 1,240 563 461 559 526 409
9 346 408 1,280 1,540 1,530 2,000 1,430 573 488 566 538 392
10 334 436 1,310 1,510 1,500 2,000 1,520 588 478 553 535 392
11 313 459 1,400 1,480 1,430 1,880 1,350 584 461 561 538 387
12 306 426 1,540 1,510 1,430 1,880 1,280 612 473 592 551 381
13 298 460 1,710 1,570 1,510 2,180 1,190 555 482 569 542 413
14 285 492 1,800 1,550 1,530 2,170 1,160 530 518 561 521 484
15 275 514 1,800 1,580 1,450 2,100 1,120 549 511 562 517 530
16 283 624 1,810 1,600 1,430 2,040 1,000 626 535 545 511 492
17 294 638 1,840 1,640 1,400 2,070 972 655 560 521 513 454
18 312 727 1,760 1,680 1,400 2,050 1,040 565 515 513 510 427
19 317 858 1,940 1,630 1,500 2,050 1,020 521 554 513 512 406
20 326 1,040 2,010 1,540 1,630 1,990 1,010 591 627 509 523 390
21 344 1,070 1,910 1,520 1,560 1,950 937 628 667 500 518 384
22 355 1,000 1,750 1,450 1,510 2,110 881 625 587 511 510 377
23 351 1,020 1,690 1,440 1,590 2,180 841 623 573 562 503 372
24 331 1,070 1,680 1,420 1,570 2,130 826 602 572 561 488 381
25 315 997 1,740 1,420 1,600 2,030 802 580 589 535 468 386
26 312 967 1,730 1,530 1,670 1,890 815 660 648 508 458 398
27 313 942 1,850 1,600 1,860 1,800 838 692 652 489 467 393
28 319 1,020 1,820 1,510 1,870 1,810 873 664 659 478 473 421
29 298 1,080 1,810 1,410 1,840 1,800 810 664 641 478 472 416
30 303   1,810 1,410 1,990 1,870 756 704 670 512 463 399
31 334   2,030   2,000   728 651   565   431