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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 -> 2020-09-30)

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
1 189 189 186 190 183 195 201 190 183 172 247 195
2 190 188 186 191 183 194 216 189 181 173 218 195
3 190 189 186 190 183 194 211 188 180 173 212 196
4 189 189 186 190 185 194 206 188 179 173 209 196
5 189 189 186 191 185 196 199 187 179 172 202 196
6 189 189 186 190 184 194 198 187 178 173 195 196
7 188 190 186 191 184 198 197 187 181 172 194 197
8 188 189 186 189 184 195 197 185 179 172 193 197
9 189 189 186 188 184 208 198 185 181 172 193 197
10 188 189 187 188 185 210 197 184 178 171 192 195
11 187 189 186 197 184 202 197 184 181 171 192 196
12 187 189 190 189 185 200 196 183 179 170 192 196
13 191 189 188 188 185 200 195 183 178 171 191 196
14 192 189 187 187 185 199 194 183 180 170 191 195
15 191 189 187 187 186 199 195 182 178 170 203 196
16 190 189 188 186 185 198 194 182 181 169 226 195
17 190 188 188 186 185 199 193 181 180 399 249 194
18 190 188 188 188 185 198 193 181 179 342 216 193
19 190 188 187 187 186 197 192 180 179 225 204 193
20 190 189 189 187 186 197 198 180 181 200 198 193
21 189 188 188 186 186 202 218 179 178 191 204 192
22 190 188 187 184 186 207 206 181 177 188 215 192
23 189 188 187 187 186 200 204 180 176 189 213 192
24 189 187 188 186 188 198 204 181 176 190 207 191
25 193 187 187 187 189 198 202 179 175 181 200 191
26 190 187 187 187 189 197 195 181 195 179 198 191
27 191 187 187 186 193 196 194 182 182 178 197 190
28 190 186 195 185 193 196 192 181 177 178 198 191
29 190 159 191 185 192 196 192 180 176 178 196 190
30 189   190 183 198 200 190 182 174 386 196 190
31 189   190   194   190 183   346   189