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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 23 - 24 years of record in, ft3/s   (Calculation Period 1994-10-01 -> 2018-09-30)

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
1 187 187 185 188 182 192 202 190 185 171 249 194
2 186 186 185 188 182 192 218 190 183 173 218 194
3 187 186 185 188 180 192 213 189 182 172 211 195
4 187 186 185 188 181 192 207 188 181 172 209 195
5 187 186 185 188 182 194 200 188 181 172 201 194
6 186 186 185 188 181 193 199 187 180 173 194 194
7 185 188 185 188 180 197 198 187 182 172 193 194
8 185 186 185 187 180 193 198 186 181 172 192 195
9 186 187 185 186 179 208 197 185 180 171 192 195
10 185 186 186 185 181 211 197 184 179 170 191 193
11 184 187 185 195 180 202 197 184 182 171 191 194
12 184 186 190 186 181 200 195 184 180 169 191 194
13 188 186 187 186 182 200 195 183 179 171 190 193
14 189 187 186 185 182 199 194 183 180 169 190 193
15 188 186 186 185 182 198 195 183 178 169 202 194
16 188 187 187 184 182 198 194 183 182 168 227 193
17 187 186 187 184 182 198 193 182 180 417 251 192
18 188 186 187 185 181 197 193 181 179 356 216 191
19 187 186 186 185 183 196 192 181 179 228 203 191
20 187 187 188 185 182 197 199 181 181 201 197 191
21 186 186 187 184 183 202 221 181 177 192 204 190
22 187 185 187 182 182 208 208 182 177 188 214 189
23 186 186 186 185 182 199 205 182 176 189 213 190
24 186 185 186 184 184 198 206 182 175 189 206 189
25 190 185 186 186 185 198 204 180 175 180 199 189
26 187 185 187 185 185 197 196 183 196 178 197 189
27 188 186 187 184 190 196 195 184 182 177 196 188
28 187 185 187 183 190 196 193 183 176 177 197 189
29 187 159 189 183 190 196 193 182 176 176 195 188
30 186   187 181 196 200 191 184 174 393 194 188
31 186   188   192   191 185   351   187