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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.

UPDATED July 25, 2022: The following stations are part of a short-term project and are scheduled to be discontinued on September 30, 2022 if alternative funding can not be secured.
  • 06192900 Dugout Creek near mouth, near Willsall, MT
  • 12355342 Hallowat Creek above Kletomus Creek, near Olney, MT
  • 12355347 Big Creek below Lookout Creek, near Apgar, MT

Please contact the Wyoming-Montana Science Center for more information.

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 05020500 St. Mary River at International Boundary


000, 95
Hydrologic Unit Code --
Latitude  49°00'41.07", Longitude 113°17'58.37" NAD83
Drainage area 462  square miles
Gage datum 4,116.04 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 1901-10-01 -> 2022-09-30)

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
1 162 150 158 260 888 2,470 1,950 783 475 444 390 268
2 162 150 158 260 924 2,500 1,890 760 466 451 387 268
3 163 150 158 266 961 2,580 1,860 737 466 454 381 265
4 165 150 159 276 981 2,680 1,810 710 458 457 379 262
5 165 150 161 289 1,010 2,820 1,760 684 457 455 375 256
6 164 150 162 304 1,060 2,860 1,720 658 460 459 371 252
7 163 151 163 312 1,110 2,890 1,650 641 461 457 377 243
8 161 149 163 315 1,180 2,950 1,590 633 457 457 406 238
9 159 149 165 320 1,230 2,910 1,540 623 456 454 413 231
10 159 149 174 334 1,290 2,810 1,500 612 455 452 405 226
11 156 148 178 345 1,330 2,740 1,460 600 456 449 391 219
12 152 149 178 357 1,370 2,690 1,410 586 458 446 390 215
13 151 149 178 379 1,410 2,670 1,380 574 465 444 390 209
14 150 149 178 405 1,470 2,640 1,340 570 462 442 389 206
15 151 152 180 418 1,520 2,590 1,310 565 462 439 388 200
16 151 157 186 442 1,600 2,590 1,280 554 465 439 385 198
17 150 155 189 462 1,670 2,660 1,230 542 466 444 376 198
18 150 154 194 477 1,740 2,660 1,200 533 469 448 367 195
19 149 153 200 484 1,830 2,660 1,160 522 473 441 357 193
20 148 149 218 508 1,890 2,680 1,120 512 476 438 346 192
21 148 148 229 542 1,940 2,630 1,090 511 479 434 338 189
22 148 148 228 568 2,010 2,520 1,060 508 484 426 329 187
23 148 147 227 599 2,100 2,420 1,030 506 483 418 321 183
24 148 154 221 629 2,180 2,340 996 512 485 412 319 180
25 149 157 221 665 2,250 2,260 967 503 479 405 314 176
26 149 154 222 702 2,360 2,210 937 499 478 403 307 173
27 148 151 227 739 2,370 2,160 910 490 468 401 300 170
28 150 151 233 770 2,370 2,100 903 491 459 399 292 169
29 150 158 239 799 2,390 2,050 872 484 454 395 287 168
30 150   244 838 2,390 2,000 836 485 447 395 281 167
31 150   253   2,420   806 486   394   165