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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 06307500 Tongue River at Tongue R Dam nr Decker MT


Big Horn County, Montana
Hydrologic Unit Code 10090101
Latitude  45°08'28.59", Longitude 106°46'16.88" NAD83
Drainage area 1,784  square miles
Gage datum 3,344.4 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 1938-10-01 -> 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
1 167 161 173 314 430 1,460 994 395 335 273 250 214
2 167 160 175 319 449 1,480 943 393 335 271 254 205
3 166 161 178 320 457 1,500 860 392 329 270 254 196
4 166 162 179 321 472 1,530 827 387 319 269 252 193
5 165 162 180 325 493 1,540 791 379 317 274 253 190
6 165 162 179 333 520 1,590 755 376 313 268 254 189
7 166 162 179 334 537 1,620 734 375 312 267 256 188
8 166 163 181 345 568 1,650 711 373 314 268 255 185
9 166 163 183 350 607 1,650 670 375 314 263 250 183
10 166 163 183 348 655 1,650 629 373 309 263 260 181
11 167 163 183 339 682 1,660 596 370 304 260 265 182
12 167 163 183 354 705 1,660 581 367 305 264 260 182
13 167 164 184 354 748 1,610 570 367 306 262 247 181
14 168 167 189 356 778 1,550 559 367 301 265 247 180
15 169 170 192 348 810 1,520 549 368 296 264 254 179
16 167 173 193 348 830 1,530 536 365 288 258 257 179
17 165 175 194 348 835 1,520 521 362 286 247 252 181
18 164 175 204 353 868 1,550 512 365 291 256 240 179
19 165 175 210 336 957 1,560 493 367 294 253 234 179
20 164 176 218 330 1,030 1,500 474 366 292 250 232 177
21 163 176 226 333 1,050 1,460 468 366 295 250 230 177
22 162 176 231 337 1,070 1,440 462 360 293 249 225 176
23 162 176 239 323 1,110 1,430 450 354 296 247 225 175
24 162 176 247 326 1,160 1,380 437 354 293 242 223 174
25 162 177 249 325 1,200 1,400 426 354 297 246 224 173
26 163 177 253 349 1,240 1,350 419 353 295 250 224 173
27 162 175 266 362 1,270 1,270 409 349 286 250 221 170
28 162 172 274 375 1,320 1,200 403 345 282 251 221 169
29 162 172 281 392 1,410 1,110 400 341 291 249 221 168
30 161   290 412 1,490 1,050 402 338 286 250 217 168
31 161   299   1,500   399 336   247   167