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USGS Daily Statistics for Texas

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Explore Real-time Water Data Using New Products from USGS TXWSC

View over 750 USGS real-time stream, lake, reservoir, precipitation, and groundwater stations in context with current weather and hazard conditions on both desktop and mobile devices.

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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 08171350 Blanco Rv at San Marcos, TX


Hays County, Texas
Hydrologic Unit Code 12100203
Latitude  29°52'46.24", Longitude  97°54'38.71" NAD83
Drainage area 436.0  square miles
Gage datum 542.97 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 4 - 5 years of record in, ft3/s   (Calculation Period 2014-10-01 -> 2019-09-30)

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
1 135 114 84 77 154 1,150 163 25 80 62 453 73
2 183 109 80 96 136 1,270 150 20 74 60 246 68
3 433 98 78 90 126 1,120 143 13 72 58 175 88
4 306 103 77 82 118 913 134 8.9 53 59 147 105
5 235 104 85 77 115 802 127 7.9 45 52 131 112
6 199 98 82 67 113 680 118 7.3 41 49 125 116
7 186 93 81 61 110 591 113 7.4 39 46 131 133
8 174 85 79 54 107 531 110 6.5 33 43 137 198
9 160 91 81 52 105 476 108 5.9 182 42 142 162
10 151 84 105 52 107 428 103 5.5 170 40 138 148
11 146 79 106 73 106 373 98 5.1 74 39 137 142
12 148 78 107 252 113 336 93 4.9 48 38 127 138
13 144 76 107 119 142 306 90 4.5 20 38 121 156
14 138 79 110 93 280 368 88 5.0 11 35 104 180
15 132 84 102 90 227 334 84 21 9.0 31 97 158
16 155 80 100 81 361 267 81 141 7.8 51 92 144
17 181 77 99 80 1,170 248 78 116 27 90 91 140
18 213 74 99 132 1,050 234 73 94 39 75 85 129
19 223 73 104 148 1,200 246 66 63 14 67 80 137
20 200 199 99 148 915 241 55 55 8.7 73 69 127
21 182 175 97 119 495 232 49 89 7.3 73 58 120
22 136 120 95 179 433 297 47 81 63 66 53 116
23 141 112 90 134 391 255 46 73 97 65 52 114
24 143 107 95 116 15,000 216 44 63 67 66 52 115
25 136 92 91 138 1,520 197 43 57 55 85 48 110
26 127 91 83 150 2,940 186 51 70 324 93 48 109
27 126 89 78 147 975 185 70 203 202 72 49 258
28 126 85 151 144 953 204 57 174 96 66 51 266
29 126 14 182 136 1,280 247 38 113 75 61 79 168
30 119   139 147 918 189 34 100 66 12,100 84 150
31 115   117   984   32 89   1,130   144