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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 24 - 25 years of record in, ft3/s   (Calculation Period 1994-10-01 -> 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
1 187 187 184 188 181 191 199 188 183 171 249 194
2 186 186 184 189 181 191 215 188 180 173 218 194
3 187 186 184 188 180 190 210 187 179 172 211 195
4 187 186 184 188 181 190 204 186 179 172 209 195
5 187 186 184 189 182 192 198 186 179 172 201 194
6 186 186 184 188 181 191 196 185 178 173 194 194
7 185 188 184 188 181 195 196 185 180 172 193 194
8 185 186 184 187 180 191 196 184 178 172 192 195
9 186 187 184 186 180 205 197 183 180 171 192 195
10 185 186 185 185 181 208 196 182 178 170 191 193
11 184 187 184 195 180 200 195 182 180 171 191 194
12 184 186 189 186 181 198 194 182 179 169 191 194
13 188 186 186 186 181 197 194 181 178 171 190 193
14 189 187 185 185 181 196 193 181 179 169 190 193
15 188 186 185 184 182 196 193 180 177 169 202 194
16 188 187 186 184 182 195 193 181 181 168 227 193
17 187 186 185 184 181 195 192 180 180 417 251 192
18 188 186 185 185 181 194 191 179 178 356 216 191
19 187 186 185 185 182 194 190 179 178 228 203 191
20 187 187 187 185 182 194 197 179 181 201 197 191
21 186 186 185 184 182 199 218 178 177 192 204 190
22 187 185 185 182 182 205 206 179 176 188 214 189
23 186 186 185 185 182 197 203 179 175 189 213 190
24 186 185 185 184 184 196 204 180 175 189 206 189
25 190 185 185 185 185 196 201 178 174 180 199 189
26 187 185 185 185 185 195 194 180 195 178 197 189
27 188 185 185 184 189 194 193 181 181 177 196 188
28 187 184 193 183 189 194 191 180 176 177 197 189
29 187 159 189 183 189 194 191 179 176 176 195 188
30 186   188 181 194 198 189 181 174 393 194 188
31 186   188   191   189 182   351   187