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USGS Surface-Water 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 12334510 Rock Creek near Clinton MT


Missoula County, Montana
Hydrologic Unit Code 17010202
Latitude  46°43'20.41", Longitude 113°40'59.02" NAD83
Drainage area 889  square miles
Gage datum 3,519.46 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 1972-10-01 -> 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
1 174 188 202 340 933 2,080 1,060 403 264 255 244 223
2 176 192 207 344 968 2,060 1,010 390 260 257 245 232
3 174 184 208 341 1,010 2,050 976 376 255 254 248 230
4 173 179 212 341 1,070 2,060 947 364 251 253 248 221
5 174 180 212 353 1,120 2,070 909 357 250 252 248 211
6 175 178 213 371 1,180 2,100 872 350 251 250 249 202
7 179 185 215 386 1,260 2,080 841 342 252 251 247 200
8 185 199 218 407 1,310 2,020 810 339 256 254 258 196
9 185 204 217 429 1,330 1,940 779 330 263 250 252 194
10 184 202 226 446 1,370 1,860 762 321 260 248 242 199
11 177 192 239 468 1,420 1,820 745 316 260 248 238 207
12 176 188 238 489 1,410 1,790 712 312 267 250 232 209
13 176 191 245 493 1,420 1,790 690 306 271 251 235 206
14 182 195 246 501 1,470 1,830 676 301 265 254 237 207
15 182 195 248 511 1,580 1,790 650 296 261 255 231 206
16 200 196 261 505 1,700 1,770 633 292 260 255 231 202
17 201 202 272 512 1,790 1,750 611 288 259 256 233 193
18 198 198 273 533 1,890 1,700 594 281 261 257 231 182
19 197 196 282 561 1,950 1,660 574 279 265 253 230 181
20 195 198 283 592 1,980 1,650 553 280 267 253 227 184
21 191 201 286 636 1,980 1,580 535 285 266 255 221 187
22 188 200 291 686 2,010 1,510 515 285 264 256 217 188
23 189 198 297 749 2,010 1,450 497 287 262 254 214 183
24 188 193 300 795 2,030 1,400 481 290 260 250 220 178
25 185 198 295 826 2,090 1,330 467 286 257 248 222 179
26 183 201 299 823 2,090 1,280 455 279 255 247 220 180
27 185 197 306 834 2,120 1,220 448 274 256 249 216 181
28 185 196 306 849 2,130 1,160 435 270 254 248 214 182
29 182 204 309 865 2,110 1,130 423 265 253 247 211 179
30 181   311 896 2,110 1,100 415 261 252 242 214 177
31 179   322   2,090   410 262   243   175