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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 08170500 San Marcos Rv at San Marcos, TX


Hays County, Texas
Hydrologic Unit Code 12100203
Latitude  29°53'20", Longitude  97°56'02" NAD27
Drainage area 48.9  square miles
Contributing drainage area 48.9  square miles
Gage datum 557.67 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 1994-10-01 -> 2022-09-30)

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
1 185 185 182 185 180 193 199 187 180 169 240 192
2 186 184 182 186 180 193 213 187 178 170 214 192
3 186 185 181 186 180 193 209 186 177 170 209 193
4 185 185 182 186 181 193 204 185 177 170 206 192
5 185 185 182 186 182 195 197 185 177 170 199 192
6 185 185 182 186 181 194 196 184 176 170 193 192
7 184 186 182 186 181 198 195 185 178 169 192 193
8 184 185 182 185 181 194 195 183 176 170 191 193
9 185 185 182 184 180 207 196 182 179 169 191 193
10 184 185 182 183 181 209 195 182 176 169 190 192
11 184 185 182 191 181 201 195 181 178 169 190 192
12 184 185 186 184 183 199 194 181 177 168 189 192
13 187 185 184 183 182 199 193 180 176 170 189 192
14 188 185 183 182 182 198 193 181 177 183 189 191
15 187 184 183 182 183 197 193 180 175 176 199 192
16 187 184 184 181 183 197 192 180 178 172 220 191
17 186 184 183 181 183 198 191 179 177 384 241 190
18 187 184 184 183 183 196 191 178 176 331 211 190
19 186 184 183 182 185 196 190 178 176 222 201 190
20 186 185 185 182 184 196 196 177 178 198 195 189
21 186 184 184 181 185 200 214 177 175 191 201 189
22 186 183 183 180 185 205 204 178 174 188 210 188
23 185 184 183 182 184 198 201 178 173 189 208 189
24 185 183 183 181 187 197 201 178 173 190 203 187
25 189 183 183 183 188 196 199 177 173 182 196 187
26 186 183 183 182 188 195 193 178 191 180 194 187
27 187 182 183 181 191 194 191 179 179 179 193 187
28 186 182 190 180 192 194 190 178 175 179 194 187
29 186 157 187 180 191 195 189 177 173 179 193 187
30 185   185 179 196 198 188 179 171 364 192 186
31 185   185   193   188 180   328   186