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USGS Surface-Water 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 -> 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 79 73 82 205 811 2,020 748 167 103 87 120 101
2 78 71 83 202 845 1,990 708 162 102 88 117 113
3 79 67 83 200 900 1,960 650 158 100 89 118 122
4 78 69 82 207 949 1,910 619 159 101 88 119 130
5 79 74 79 207 1,090 1,860 581 151 103 87 128 119
6 81 75 78 203 1,260 1,730 541 150 103 86 137 117
7 81 77 77 215 1,320 1,630 513 161 103 86 132 120
8 79 79 77 238 1,240 1,580 472 156 102 89 125 104
9 77 85 75 262 1,220 1,570 442 148 105 90 121 102
10 76 93 75 282 1,180 1,540 412 143 104 91 121 101
11 75 98 77 291 1,130 1,420 392 139 102 94 112 97
12 75 97 80 293 1,090 1,390 363 132 100 94 110 94
13 75 98 82 291 1,110 1,460 342 130 99 94 109 97
14 72 100 91 279 1,130 1,450 328 127 97 95 108 94
15 74 102 148 262 1,250 1,310 318 128 97 96 111 91
16 76 104 213 248 1,470 1,230 299 124 96 99 113 93
17 73 105 185 254 1,610 1,280 283 123 94 105 108 93
18 74 100 170 270 1,690 1,310 272 119 93 102 110 94
19 73 94 194 297 1,760 1,470 255 117 93 100 111 95
20 69 93 176 387 1,780 1,300 247 115 92 101 109 91
21 70 89 170 446 1,710 1,220 240 118 92 101 105 89
22 68 89 169 515 1,600 1,180 231 118 95 103 104 87
23 68 89 172 576 1,600 1,130 225 116 94 102 118 85
24 68 87 172 562 1,710 1,060 216 116 91 102 141 87
25 68 86 169 533 1,800 990 208 112 90 100 122 88
26 70 84 165 524 1,990 922 200 109 90 103 112 87
27 72 83 167 542 2,100 859 198 107 91 107 109 85
28 72 83 185 580 2,040 817 191 104 91 107 104 82
29 72 75 194 652 2,010 796 184 101 91 106 103 82
30 72   192 755 1,980 788 177 101 90 108 106 82
31 72   200   2,010   171 102   114   82