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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 06307662 Tongue River at Ashland, MT


Rosebud County, Montana
Hydrologic Unit Code 10090102
Latitude  45°35'51.9", Longitude 106°16'29.8" NAD83
Drainage area 2,900  square miles
Gage datum 2,903 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 2020-10-01 -> 2024-09-30)

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
1 145 146 130 121 392 1,100 1,630 461 402 325 319 201
2 144 150 130 121 386 1,100 1,520 463 393 322 319 199
3 142 151 131 122 386 1,440 1,470 467 388 321 319 198
4 136 151 132 124 386 1,610 1,420 464 398 311 318 200
5 143 151 134 128 386 1,760 1,330 469 425 304 319 208
6 145 152 134 130 389 1,880 1,380 476 400 300 317 207
7 145 151 134 135 391 2,070 1,460 485 394 300 317 204
8 144 150 134 145 387 2,220 1,370 479 386 300 323 205
9 138 150 134 153 386 2,220 1,350 468 399 301 324 203
10 133 154 133 149 388 2,140 1,280 460 423 303 319 202
11 128 157 133 146 404 2,220 1,230 459 402 299 321 201
12 128 163 133 143 403 2,410 1,140 455 395 308 321 195
13 126 120 134 137 424 2,780 1,030 456 394 312 321 198
14 126 119 136 139 445 2,890 965 454 389 302 325 197
15 131 117 139 145 451 2,790 932 443 389 298 320 191
16 151 117 140 152 471 2,630 892 443 392 296 315 191
17 164 118 131 180 488 2,450 837 438 396 292 307 195
18 160 119 128 228 467 2,370 792 437 391 285 291 187
19 151 119 126 270 510 2,360 738 430 389 288 272 185
20 157 119 124 296 750 2,350 693 429 388 293 247 184
21 158 119 123 330 889 2,460 649 430 389 293 226 187
22 158 119 123 351 929 2,480 611 427 425 293 225 185
23 157 118 122 367 969 2,320 590 440 459 295 223 181
24 157 117 121 384 995 2,150 561 431 393 297 221 177
25 155 120 122 388 1,040 2,020 626 425 380 296 215 141
26 154 125 121 383 1,140 2,210 556 432 379 313 223 132
27 150 128 121 384 1,210 2,380 513 431 378 316 220 143
28 153 130 122 387 1,270 2,170 497 430 377 320 219 150
29 151   120 386 1,310 1,950 493 425 328 319 218 153
30 149   121 393 1,200 1,770 481 410 328 319 204 150
31 147   121   1,120   476 408   319   146