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USGS 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 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
1 353 346 369 776 2,110 4,450 2,270 637 331 427 523 426
2 355 353 367 807 2,120 4,450 2,150 614 328 431 520 435
3 356 350 370 808 2,140 4,460 2,030 598 325 437 524 434
4 356 348 373 853 2,210 4,550 1,940 579 321 442 532 428
5 353 351 372 908 2,270 4,560 1,870 558 320 446 530 410
6 349 355 379 954 2,330 4,630 1,750 538 321 450 530 401
7 350 360 383 1,010 2,410 4,670 1,660 518 322 451 528 395
8 356 366 389 1,070 2,530 4,680 1,590 498 324 455 530 385
9 356 368 394 1,150 2,630 4,650 1,540 479 334 457 526 385
10 354 367 400 1,210 2,680 4,560 1,490 463 336 460 516 389
11 352 367 411 1,290 2,720 4,450 1,440 451 335 464 507 395
12 353 365 423 1,340 2,750 4,280 1,390 441 338 469 500 395
13 352 359 433 1,380 2,810 4,200 1,330 429 339 474 498 389
14 355 359 443 1,440 2,900 4,090 1,260 421 340 483 497 387
15 354 360 453 1,490 3,000 3,970 1,200 414 339 490 497 386
16 351 360 482 1,530 3,140 3,880 1,130 406 342 496 488 381
17 348 360 504 1,570 3,290 3,860 1,070 394 346 497 491 378
18 346 361 511 1,670 3,420 3,830 1,030 383 354 499 491 368
19 346 360 516 1,710 3,510 3,770 981 374 363 498 479 365
20 345 362 531 1,750 3,660 3,590 952 366 376 501 467 368
21 342 362 544 1,800 3,790 3,480 915 363 384 507 458 370
22 342 361 550 1,830 3,890 3,360 883 365 388 514 440 369
23 344 360 562 1,900 3,930 3,230 845 366 391 520 432 378
24 344 359 567 1,960 3,980 3,080 802 374 393 522 439 375
25 345 361 574 2,000 4,050 2,930 764 370 393 520 454 371
26 346 368 586 2,010 4,120 2,790 737 363 396 524 452 367
27 345 369 605 1,980 4,230 2,680 715 356 397 528 438 373
28 342 368 657 1,980 4,260 2,580 692 347 402 524 434 369
29 340 368 698 2,010 4,350 2,480 672 340 411 520 431 359
30 340   712 2,040 4,410 2,400 658 334 416 516 422 358
31 344   733   4,430   653 332   519   356