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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
1 168 162 174 315 431 1,460 994 395 335 273 250 214
2 168 161 176 320 450 1,480 943 393 335 271 254 205
3 167 162 179 322 458 1,500 860 392 329 270 254 196
4 167 162 180 323 473 1,530 827 387 319 269 252 193
5 166 163 181 327 493 1,540 791 379 317 274 253 190
6 166 163 180 335 520 1,590 755 376 313 268 254 189
7 167 163 180 336 536 1,620 734 375 312 267 256 188
8 167 164 182 347 567 1,650 711 373 314 268 255 185
9 167 164 184 352 607 1,650 670 375 314 263 250 183
10 167 164 185 350 656 1,650 629 373 309 263 260 181
11 168 164 185 341 682 1,660 596 370 304 260 265 182
12 168 164 185 356 705 1,660 581 367 305 264 260 182
13 168 165 186 356 747 1,610 570 367 306 262 247 181
14 169 168 190 358 777 1,550 559 367 301 265 247 180
15 170 171 194 350 809 1,520 549 368 296 264 254 180
16 168 174 194 350 830 1,530 536 365 288 258 257 180
17 166 176 195 350 835 1,520 521 362 286 247 252 181
18 165 176 206 355 868 1,550 512 365 291 256 240 180
19 166 176 211 338 957 1,560 493 367 294 253 234 180
20 165 177 220 331 1,030 1,500 474 366 292 250 232 178
21 164 177 228 334 1,050 1,460 468 366 295 250 230 178
22 163 177 233 339 1,070 1,440 462 360 293 249 225 177
23 163 177 241 325 1,110 1,430 450 354 296 247 225 176
24 163 177 249 328 1,160 1,380 437 354 293 242 223 175
25 163 178 251 326 1,200 1,400 426 354 297 246 224 174
26 164 178 255 350 1,240 1,350 419 353 295 250 224 173
27 163 176 267 363 1,270 1,270 409 349 286 250 221 171
28 163 173 275 377 1,320 1,200 403 345 282 251 221 170
29 163 172 282 393 1,410 1,110 400 341 291 249 221 169
30 162   291 413 1,490 1,050 402 338 286 250 217 168
31 162   301   1,500   399 336   247   168