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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 06040800 Madison River ab powerplant nr McAllister MT


Madison County, Montana
Hydrologic Unit Code 10020007
Latitude  45°29'11.74", Longitude 111°38'01.89" NAD83
Drainage area 2,212.7  square miles
Gage datum 4,690 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 2001-10-01 -> 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
1 332 298 294 336 611 2,050 1,120 433 397 365 418 384
2 329 292 313 365 658 2,100 1,010 445 411 355 434 386
3 321 280 294 387 630 2,100 937 387 385 357 445 388
4 324 272 314 385 660 2,110 984 378 381 358 505 407
5 340 275 304 378 663 2,220 992 360 369 373 553 413
6 353 294 287 374 629 2,280 882 344 343 381 581 402
7 343 324 293 364 691 2,350 811 336 336 363 552 402
8 339 325 285 358 768 2,280 768 315 341 359 500 407
9 334 314 287 384 755 2,100 723 282 352 358 471 414
10 346 302 292 401 714 2,020 728 291 364 351 476 392
11 352 288 293 407 741 1,940 710 299 359 341 515 394
12 303 269 292 389 789 1,820 679 290 392 356 519 403
13 281 257 291 399 831 1,800 662 310 406 383 505 392
14 287 265 314 390 853 1,720 629 314 416 381 500 392
15 286 290 335 410 947 1,610 674 289 434 351 478 407
16 313 311 341 456 1,060 1,560 643 265 423 340 425 413
17 287 310 320 489 1,120 1,580 650 276 437 335 426 401
18 300 289 302 492 1,160 1,570 625 280 436 336 428 401
19 315 260 296 472 1,260 1,620 558 270 430 336 420 413
20 357 260 308 462 1,390 1,530 601 291 439 368 397 428
21 379 283 314 501 1,490 1,420 626 277 458 428 402 416
22 390 273 303 531 1,480 1,400 632 272 468 457 394 392
23 339 296 298 546 1,510 1,360 606 269 406 444 394 384
24 306 296 297 560 1,590 1,370 569 259 404 493 402 371
25 278 293 285 567 1,630 1,330 547 254 392 529 400 342
26 283 271 295 594 1,620 1,250 488 282 383 505 399 326
27 309 272 304 591 1,600 1,250 517 249 381 469 395 340
28 320 287 302 564 1,650 1,160 512 269 393 459 400 344
29 339 359 297 545 1,710 1,180 479 262 391 413 404 356
30 343   287 573 1,890 1,150 459 270 370 404 389 349
31 320   292   1,940   446 330   403   341