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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 06126500 Musselshell River near Roundup MT


Musselshell County, Montana
Hydrologic Unit Code 10040202
Latitude  46°25'39.79", Longitude 108°34'12.37" NAD83
Drainage area 3,998  square miles
Gage datum 3,193 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 1946-10-01 -> 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 58 67 115 165 201 722 460 198 159 91 81 70
2 57 67 115 165 208 683 431 195 152 89 82 68
3 57 67 134 164 217 654 417 191 147 84 83 68
4 62 68 127 162 221 639 419 188 142 83 85 67
5 64 69 123 167 231 636 418 191 139 82 84 67
6 65 70 121 164 245 648 398 192 138 81 82 65
7 64 72 124 159 273 709 376 191 136 79 82 65
8 62 85 135 163 291 848 355 191 136 79 82 65
9 62 85 179 170 305 818 339 184 135 78 82 65
10 59 81 270 180 316 796 323 183 132 76 81 66
11 58 98 241 191 329 792 310 180 130 77 79 67
12 58 105 206 191 348 744 306 182 133 79 77 67
13 59 114 173 196 368 706 294 181 132 80 79 68
14 58 108 175 204 389 735 286 186 131 79 78 68
15 58 96 172 197 384 747 282 186 126 80 76 66
16 61 96 190 188 398 734 275 187 121 82 76 65
17 68 94 213 178 435 726 268 182 118 83 76 64
18 67 92 221 174 484 767 260 179 115 82 76 64
19 66 92 224 169 500 788 263 177 113 80 75 68
20 66 94 251 167 515 774 250 190 113 80 76 66
21 66 96 245 169 536 756 242 183 114 80 73 66
22 66 94 281 172 572 784 246 182 115 79 73 65
23 67 94 281 178 590 772 244 179 116 79 73 63
24 67 93 251 178 601 696 235 186 113 79 75 64
25 67 96 247 177 648 640 224 185 108 79 75 63
26 67 114 254 175 775 610 222 184 102 82 73 63
27 67 121 247 184 770 588 227 177 99 82 70 62
28 67 116 227 196 788 571 223 166 97 80 70 61
29 68 130 202 194 742 542 216 159 94 80 70 61
30 70   184 193 706 509 215 176 93 80 70 60
31 68   170   684   211 164   82   60