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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
1 188 188 184 188 182 195 201 190 183 172 245 194
2 189 187 184 189 182 195 216 189 181 173 216 195
3 189 188 184 189 182 194 211 188 180 173 210 195
4 188 188 185 189 183 194 206 188 179 173 208 195
5 188 187 185 189 184 196 199 187 179 172 201 195
6 187 187 184 189 183 194 198 187 178 173 194 195
7 187 189 185 190 183 198 197 187 181 172 193 196
8 187 188 185 188 183 195 197 185 179 172 193 196
9 187 188 185 187 182 207 198 185 181 172 192 196
10 187 188 185 186 183 210 197 184 178 171 192 194
11 186 188 184 195 183 202 197 184 181 171 192 195
12 186 188 189 187 185 200 196 183 179 170 191 195
13 190 187 186 186 184 200 195 183 178 171 191 194
14 191 188 186 186 185 199 194 183 180 170 191 194
15 189 187 186 185 185 198 195 182 178 170 202 195
16 189 187 186 184 185 198 194 182 181 169 225 194
17 189 187 186 184 185 199 193 181 180 399 247 193
18 189 187 186 186 185 197 193 181 179 342 215 192
19 189 186 186 185 186 196 192 180 179 225 203 192
20 189 188 188 186 185 197 198 180 181 200 197 192
21 188 186 186 184 186 202 218 179 178 191 203 191
22 189 186 186 183 186 207 206 181 177 188 213 190
23 188 187 186 185 185 200 204 180 176 189 212 191
24 188 186 186 184 188 198 204 181 176 190 206 190
25 192 186 186 186 189 198 202 179 175 182 199 190
26 189 185 186 185 189 197 195 181 195 179 197 190
27 190 185 186 184 193 196 194 182 182 178 196 189
28 189 184 193 183 193 196 192 181 177 178 197 190
29 188 157 190 183 193 196 192 180 176 178 196 189
30 188   188 182 198 200 190 182 174 378 195 189
31 188   188   195   190 183   339   188