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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 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
1 342 304 298 340 611 2,050 1,120 433 397 365 432 396
2 339 298 317 370 658 2,100 1,010 445 411 355 449 399
3 331 286 301 393 630 2,100 937 387 385 357 460 400
4 331 280 323 391 660 2,110 984 378 381 370 487 420
5 349 283 313 384 663 2,220 992 360 369 385 523 426
6 364 302 295 380 629 2,280 882 344 343 393 552 415
7 354 323 301 370 691 2,350 811 336 336 374 522 415
8 349 330 293 363 768 2,280 768 315 341 370 496 420
9 345 323 295 391 755 2,100 723 282 352 369 487 426
10 357 311 301 408 714 2,020 728 291 364 361 492 405
11 364 296 302 407 741 1,940 710 299 359 351 533 397
12 309 276 300 389 789 1,820 679 290 392 367 538 405
13 287 264 299 399 831 1,800 662 310 406 395 522 406
14 295 272 323 390 853 1,720 629 314 416 393 518 405
15 294 284 345 410 947 1,610 674 289 434 362 495 420
16 322 301 352 456 1,060 1,560 643 265 423 350 439 427
17 295 305 329 489 1,120 1,580 650 276 437 345 440 415
18 308 289 311 492 1,160 1,570 625 280 436 347 443 414
19 324 263 304 472 1,260 1,620 558 270 430 346 434 427
20 368 267 317 462 1,390 1,530 601 291 439 379 410 442
21 391 280 323 501 1,490 1,420 626 277 458 442 415 430
22 402 269 311 531 1,480 1,400 632 272 468 473 406 405
23 348 297 307 546 1,510 1,360 606 269 406 459 407 396
24 311 303 305 560 1,590 1,370 569 259 404 510 415 383
25 284 301 293 567 1,630 1,330 547 254 392 548 413 353
26 291 271 304 594 1,620 1,250 488 282 383 523 412 336
27 318 270 313 591 1,600 1,250 517 249 381 485 408 351
28 330 291 309 564 1,650 1,160 512 269 393 475 413 354
29 349 359 303 545 1,710 1,180 479 262 391 427 417 367
30 354   295 573 1,890 1,150 459 270 370 417 402 360
31 330   298   1,940   446 330   417   351