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USGS Daily Statistics for the Nation

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 06200000 Boulder River at Big Timber MT


Sweet Grass County, Montana
Hydrologic Unit Code 10070002
Latitude  45°50'01.66", Longitude 109°56'19.34" NAD83
Drainage area 525  square miles
Gage datum 4,056.3 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 1947-10-01 -> 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
1 136 128 123 147 401 2,310 2,350 386 166 201 216 176
2 136 127 123 149 433 2,350 2,250 369 165 204 210 175
3 137 127 123 147 454 2,480 2,200 347 163 206 211 173
4 138 127 122 146 487 2,680 2,140 331 160 210 212 172
5 140 127 122 149 503 2,880 2,060 317 158 211 209 165
6 137 124 127 153 539 3,090 1,950 300 159 213 210 163
7 137 123 126 159 593 3,100 1,880 284 159 215 209 163
8 137 123 127 163 649 3,040 1,790 268 157 215 212 162
9 137 124 127 167 682 2,960 1,680 254 159 215 209 160
10 140 127 128 173 702 2,960 1,610 241 162 215 204 165
11 138 129 127 178 733 2,870 1,530 231 167 217 200 168
12 138 131 129 183 765 2,790 1,410 223 176 221 198 170
13 140 132 129 183 830 2,870 1,320 218 178 220 200 165
14 141 131 129 187 873 2,920 1,250 212 176 220 201 162
15 142 130 128 194 940 2,860 1,170 204 176 223 195 159
16 139 134 129 198 1,000 2,880 1,080 198 174 228 197 155
17 137 136 131 202 1,110 2,910 994 193 173 231 198 151
18 137 135 133 208 1,180 2,860 923 189 175 231 196 148
19 134 134 134 219 1,260 2,880 863 189 184 228 195 151
20 133 132 134 230 1,370 2,830 819 187 191 228 193 148
21 136 131 135 244 1,490 2,790 761 190 195 227 189 151
22 134 130 137 257 1,550 2,780 708 189 198 228 182 150
23 135 129 136 281 1,610 2,740 661 189 194 224 180 146
24 135 127 138 297 1,660 2,730 617 192 196 224 187 143
25 134 127 137 310 1,760 2,690 583 187 195 222 187 144
26 133 124 138 320 1,830 2,620 550 183 194 221 183 144
27 130 125 140 328 1,940 2,580 513 176 197 219 178 143
28 129 125 139 336 2,080 2,530 480 171 199 217 176 145
29 130 125 139 349 2,200 2,450 453 171 196 217 175 145
30 128   142 368 2,220 2,400 436 171 194 212 175 141
31 129   145   2,250   410 169   220   139