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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 06079000 South Fork Sun River near Augusta MT


Lewis And Clark County, Montana
Hydrologic Unit Code 10030104
Latitude  47°37'42.99", Longitude 112°51'56.74" NAD83
Drainage area 251  square miles
Gage datum 4,730 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 1910-10-01 -> 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 75 70 78 195 778 1,920 715 161 100 84 114 96
2 74 68 78 193 809 1,900 677 157 99 85 112 107
3 75 64 77 194 858 1,870 623 152 97 87 113 116
4 75 65 76 205 904 1,840 593 153 99 86 113 123
5 76 69 73 205 1,040 1,790 557 147 100 85 122 112
6 77 71 73 200 1,200 1,670 519 145 100 84 129 111
7 77 72 72 211 1,250 1,580 491 156 100 84 125 114
8 76 75 72 230 1,180 1,530 453 151 99 87 119 99
9 74 80 71 252 1,160 1,520 424 143 101 87 115 97
10 73 86 71 271 1,120 1,490 396 139 100 88 115 96
11 73 90 72 280 1,090 1,380 376 135 99 91 107 93
12 72 89 78 283 1,070 1,340 348 129 98 91 105 90
13 72 90 80 289 1,110 1,400 329 126 96 91 104 92
14 69 91 88 292 1,130 1,390 315 123 95 92 103 89
15 72 92 139 288 1,240 1,260 305 125 94 93 106 87
16 73 94 199 278 1,450 1,180 288 122 94 95 107 89
17 71 95 174 273 1,590 1,230 272 120 92 101 103 88
18 71 92 161 281 1,650 1,250 262 116 92 98 105 90
19 70 87 186 301 1,700 1,400 246 114 92 97 105 90
20 67 85 171 380 1,700 1,240 238 113 90 98 103 87
21 67 82 166 433 1,640 1,160 231 115 90 98 99 85
22 66 82 165 496 1,530 1,130 223 114 92 99 99 84
23 65 82 167 552 1,530 1,070 216 113 92 98 111 81
24 66 81 166 540 1,630 1,010 208 112 89 98 132 83
25 66 80 163 520 1,720 945 201 108 88 97 115 84
26 68 80 159 515 1,890 880 193 106 88 99 106 83
27 70 78 161 531 2,000 824 191 104 88 103 103 81
28 70 79 176 564 1,940 784 184 101 89 103 99 79
29 70 71 184 629 1,940 762 177 99 88 102 98 79
30 71   182 721 1,900 753 171 98 88 103 101 79
31 69   190   1,920   165 99   109   78