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USGS Surface-Water Daily Statistics for Iowa

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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 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 1,900 713 589 687 617 465
2 425 381 1,020 1,900 1,470 2,100 1,760 721 547 680 612 462
3 399 377 1,070 1,830 1,500 2,070 1,630 669 536 697 583 454
4 375 367 1,210 1,790 1,520 2,180 1,550 615 516 707 574 442
5 386 382 1,320 1,750 1,540 2,120 1,430 591 485 678 570 438
6 444 396 1,300 1,710 1,550 1,910 1,340 566 489 703 560 449
7 408 417 1,340 1,630 1,560 1,830 1,260 555 470 649 562 433
8 379 403 1,290 1,540 1,570 1,810 1,240 551 530 642 551 421
9 353 410 1,270 1,520 1,570 1,990 1,420 561 546 659 558 403
10 338 436 1,300 1,500 1,530 2,000 1,500 575 526 662 552 400
11 317 457 1,380 1,470 1,450 1,880 1,340 572 500 688 553 393
12 310 425 1,510 1,500 1,430 1,870 1,270 598 503 717 565 386
13 303 455 1,680 1,560 1,510 2,140 1,180 544 502 681 552 413
14 290 484 1,820 1,540 1,530 2,120 1,150 519 530 655 531 478
15 280 505 1,870 1,560 1,460 2,070 1,110 537 520 642 526 521
16 287 613 1,870 1,590 1,430 2,080 996 611 541 616 520 484
17 298 631 1,880 1,620 1,410 2,090 963 638 562 583 521 447
18 314 716 1,780 1,660 1,420 2,040 1,030 551 518 567 516 421
19 317 837 1,960 1,610 1,530 2,050 1,010 509 560 558 516 402
20 324 1,000 2,040 1,530 1,660 2,020 993 577 654 549 526 387
21 341 1,030 1,950 1,500 1,590 1,970 924 619 707 543 521 381
22 353 970 1,790 1,430 1,550 2,140 868 618 639 576 515 374
23 350 987 1,730 1,440 1,610 2,220 829 612 633 619 509 369
24 332 1,040 1,720 1,430 1,620 2,160 814 590 642 612 497 377
25 318 977 1,770 1,420 1,660 2,050 789 568 656 582 479 383
26 316 948 1,760 1,520 1,750 1,920 800 644 719 553 469 394
27 317 960 1,860 1,580 1,930 1,810 821 675 720 532 475 404
28 322 1,070 1,820 1,490 1,950 1,820 854 648 716 517 480 464
29 302 1,040 1,810 1,400 1,930 1,800 793 649 687 513 477 458
30 309   1,800 1,400 2,070 1,870 741 688 708 545 468 441
31 340   2,000   2,060   714 637   588   465