Warning: Javascript must be enabled to use all the features on this page!


Page Loading - Please Wait...

Click to hideNews Bulletins

USGS Daily Statistics for Montana

Click to hide state-specific text

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 12355000 Flathead River at Flathead British Columbia


000, British Columbia
Hydrologic Unit Code --
Latitude  49°00'04.47", Longitude 114°28'32.39" NAD83
Drainage area 429  square miles
Gage datum 3,968.16 feet above NGVD29
Output formats
HTML table of all data
Tab-separated data
Reselect output format

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 1928-10-01 -> 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
1 200 181 179 302 1,940 4,030 1,690 499 298 322 361 293
2 196 182 176 309 2,010 4,030 1,600 486 298 311 354 322
3 196 180 175 323 2,090 4,100 1,530 476 294 298 347 301
4 198 181 176 341 2,220 4,080 1,460 459 288 291 361 295
5 198 182 179 361 2,370 4,010 1,390 446 285 289 374 280
6 198 184 180 391 2,530 3,940 1,330 433 287 283 385 279
7 198 188 181 414 2,610 3,860 1,270 422 285 281 434 285
8 197 190 183 445 2,680 3,690 1,220 413 282 281 439 268
9 196 187 184 480 2,790 3,530 1,150 414 281 281 383 268
10 197 180 186 522 2,870 3,360 1,100 405 276 284 384 271
11 191 178 189 551 2,980 3,250 1,060 396 274 282 432 268
12 190 175 193 584 3,110 3,180 1,020 388 271 281 393 266
13 189 173 197 612 3,330 3,180 995 379 271 283 442 260
14 187 171 198 660 3,390 3,170 982 370 270 287 419 254
15 186 171 210 701 3,410 3,060 932 362 270 304 420 251
16 189 172 228 757 3,550 3,010 878 354 271 319 396 245
17 196 171 222 807 3,690 3,050 839 350 273 324 357 240
18 195 171 222 909 3,820 2,980 809 342 280 322 337 236
19 194 173 226 963 3,860 2,800 780 333 283 333 326 232
20 200 173 227 1,030 3,950 2,730 746 330 284 352 325 231
21 201 172 227 1,120 4,020 2,620 715 328 286 342 321 227
22 197 172 227 1,230 4,120 2,470 685 321 286 335 311 226
23 196 174 228 1,320 4,180 2,360 658 322 283 331 308 220
24 195 173 232 1,420 4,220 2,270 637 324 280 325 316 216
25 195 175 246 1,500 4,240 2,160 617 320 281 340 308 217
26 190 188 254 1,540 4,310 2,060 601 317 288 358 301 223
27 186 184 256 1,550 4,290 1,980 580 312 285 356 302 232
28 181 181 268 1,650 4,180 1,870 563 305 280 382 302 233
29 179 176 281 1,780 4,120 1,790 549 300 278 389 295 222
30 180   287 1,850 4,110 1,750 536 298 292 372 287 212
31 182   298   4,100   519 300   362   206