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USGS Surface-Water 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 06033000 Boulder River near Boulder MT


Jefferson County, Montana
Hydrologic Unit Code 10020006
Latitude  46°12'39.71", Longitude 112°05'29.94" NAD83
Drainage area 381  square miles
Gage datum 4,810 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 1928-10-01 -> 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 28 31 32 83 272 608 188 45 27 34 41 34
2 28 31 33 88 276 600 179 43 27 35 40 35
3 28 30 34 90 292 606 173 44 26 35 41 34
4 28 30 34 97 322 604 166 41 26 35 42 33
5 28 31 35 109 342 584 154 41 27 37 41 32
6 28 31 35 112 356 581 148 41 26 38 41 32
7 28 30 35 115 378 567 141 39 26 38 41 31
8 29 31 36 118 383 554 132 37 26 37 42 30
9 29 33 37 121 388 540 123 35 29 37 40 30
10 28 32 39 123 402 518 117 34 30 37 40 30
11 28 33 41 131 410 500 116 34 28 37 39 30
12 28 32 42 137 419 487 110 34 29 38 38 30
13 28 32 43 145 438 481 105 34 29 38 39 30
14 28 32 45 155 452 454 99 33 28 38 39 30
15 28 32 47 162 457 422 90 32 29 39 38 30
16 28 32 53 163 486 428 83 32 29 39 38 29
17 29 31 52 168 532 442 80 31 30 40 36 29
18 29 31 54 181 552 410 81 29 31 39 37 29
19 28 31 56 188 572 386 74 29 31 40 36 29
20 28 31 56 203 593 363 70 29 32 41 35 29
21 28 31 56 212 607 336 66 29 32 41 34 29
22 28 31 58 229 612 318 62 32 34 41 32 29
23 28 31 60 245 608 294 59 32 33 41 33 29
24 28 32 61 246 618 278 57 33 33 41 35 29
25 28 34 63 241 626 266 54 30 33 41 35 29
26 28 35 66 235 626 258 53 30 34 41 35 28
27 28 33 72 237 626 241 55 30 34 41 34 28
28 28 32 72 243 637 231 53 28 34 41 34 28
29 28 34 71 255 635 220 53 29 34 40 34 28
30 28   72 267 629 205 50 28 34 40 34 28
31 29   75   617   48 28   41   28