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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 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 -> 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 28 31 32 83 271 604 187 45 27 34 41 34
2 28 31 33 88 275 596 178 43 27 35 40 35
3 28 30 34 90 290 602 172 44 26 35 41 34
4 28 30 34 99 319 601 165 41 25 35 42 33
5 28 31 35 111 340 581 153 41 27 36 41 32
6 28 31 35 114 353 577 147 41 26 37 41 32
7 28 30 35 115 376 563 140 39 26 38 41 31
8 29 31 36 117 380 550 131 37 26 37 42 30
9 29 33 37 120 385 536 122 35 28 37 40 30
10 28 32 39 123 400 515 116 34 29 37 40 30
11 28 33 41 131 408 497 116 34 28 37 39 30
12 28 32 42 137 418 484 109 33 29 38 38 30
13 28 32 43 146 437 477 104 34 29 38 39 30
14 28 32 45 157 451 451 99 33 28 38 39 30
15 28 32 47 164 456 419 90 32 29 39 38 30
16 28 32 53 165 485 425 82 32 29 39 38 29
17 29 31 52 169 530 439 79 31 30 39 36 29
18 29 31 54 181 550 407 80 29 31 39 37 29
19 28 31 56 188 569 384 74 29 31 39 36 29
20 28 31 57 202 589 361 69 29 32 41 35 29
21 28 31 58 211 603 334 65 29 32 41 34 29
22 28 32 60 228 608 316 61 32 34 41 32 29
23 28 31 62 244 604 292 59 31 33 41 33 29
24 28 32 62 245 615 275 56 33 33 41 35 29
25 28 34 63 240 622 263 53 30 33 41 35 29
26 28 35 66 235 622 256 53 30 34 41 35 28
27 28 33 72 237 622 239 54 30 34 41 34 28
28 28 33 72 242 633 230 53 28 33 41 34 28
29 28 34 71 254 632 219 52 28 34 40 34 28
30 28   72 266 626 203 50 28 34 40 34 28
31 29   75   613   48 27   41   28