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USGS Daily Statistics for Montana

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Questions or concerns about USGS data and data products in Montana and Wyoming can be directed to the Wyoming-Montana Water Science Center Data Management Section.


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 06025500 Big Hole River near Melrose MT


Madison County, Montana
Hydrologic Unit Code 10020004
Latitude  45°31'35.69", Longitude 112°42'06.21" NAD83
Drainage area 2,472  square miles
Gage datum 5,032.87 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 water year of record in, ft3/s   (Calculation Period 1923-10-01 -> 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
1 355 347 369 772 2,110 4,450 2,270 637 331 427 523 428
2 356 354 367 806 2,120 4,450 2,150 614 328 431 520 436
3 357 350 370 808 2,140 4,460 2,030 598 325 437 524 435
4 357 349 373 854 2,210 4,550 1,940 579 321 442 532 430
5 354 352 372 910 2,270 4,560 1,870 558 320 446 530 412
6 350 357 379 957 2,330 4,630 1,750 538 321 450 530 402
7 351 362 383 1,010 2,410 4,670 1,660 518 322 451 530 396
8 357 368 390 1,070 2,530 4,680 1,590 498 324 455 532 386
9 357 370 394 1,150 2,630 4,650 1,540 479 334 457 528 386
10 355 369 400 1,210 2,680 4,560 1,490 463 336 460 518 391
11 353 369 412 1,290 2,720 4,450 1,440 451 335 464 509 396
12 354 367 424 1,340 2,750 4,280 1,390 441 338 469 501 396
13 353 360 433 1,380 2,810 4,200 1,330 429 339 474 500 391
14 356 360 443 1,440 2,900 4,090 1,260 421 340 483 499 388
15 355 361 453 1,500 3,000 3,970 1,200 414 339 490 498 387
16 352 362 483 1,540 3,140 3,880 1,130 406 342 496 490 382
17 349 361 505 1,580 3,290 3,860 1,070 394 346 497 493 379
18 347 363 512 1,670 3,420 3,830 1,030 383 354 499 493 369
19 348 361 518 1,710 3,510 3,770 981 374 363 498 481 366
20 346 363 532 1,750 3,660 3,590 952 366 376 501 469 369
21 343 363 546 1,800 3,790 3,480 915 363 384 507 460 371
22 343 362 552 1,830 3,890 3,360 883 365 388 514 441 369
23 346 361 564 1,900 3,930 3,230 845 366 391 520 433 378
24 346 360 569 1,960 3,980 3,080 802 374 393 522 440 375
25 346 362 575 2,000 4,050 2,930 764 370 393 520 456 372
26 347 368 586 2,010 4,120 2,790 737 363 396 524 454 368
27 347 369 603 1,980 4,230 2,680 715 356 397 528 440 374
28 344 368 653 1,980 4,260 2,580 692 347 402 524 435 369
29 341 368 693 2,010 4,350 2,480 672 340 411 520 433 359
30 341   706 2,040 4,410 2,400 658 334 416 516 424 358
31 346   728   4,430   653 332   519   357