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USGS Daily Statistics for Texas

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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 NAVD88
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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 -> 2024-09-30)

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
1 178 180 177 179 176 187 192 181 173 163 230 184
2 179 180 178 180 175 187 205 180 172 164 205 185
3 179 183 177 180 175 187 201 179 171 164 200 185
4 179 182 178 180 177 187 196 179 171 164 198 185
5 179 181 178 180 177 189 190 178 170 164 192 185
6 178 181 177 180 176 188 189 178 169 164 186 185
7 178 182 178 180 176 191 189 178 171 164 185 185
8 178 181 178 178 176 188 189 177 170 164 184 185
9 178 181 178 178 176 199 189 176 172 163 184 185
10 178 181 178 177 177 201 188 175 169 163 183 184
11 177 181 177 186 176 194 188 175 171 163 183 184
12 177 181 181 179 178 192 187 174 170 162 183 184
13 180 181 179 179 178 192 186 174 169 164 182 184
14 181 181 179 178 178 191 186 174 170 177 183 184
15 179 181 179 177 178 190 186 173 169 170 192 184
16 179 181 179 177 178 190 185 173 172 166 212 183
17 179 181 179 177 178 191 184 172 171 364 231 183
18 179 180 179 178 179 190 184 171 169 314 203 184
19 179 180 179 178 180 189 183 171 169 212 193 183
20 178 181 180 178 179 189 189 171 171 191 188 182
21 178 180 179 177 180 193 206 170 168 184 193 182
22 181 180 178 175 180 198 196 171 168 181 202 181
23 179 180 178 178 179 191 194 171 167 182 200 181
24 180 179 178 177 182 190 194 171 166 183 195 180
25 184 179 178 178 183 189 192 170 166 175 189 180
26 181 178 178 178 183 188 186 172 183 175 188 180
27 182 178 178 177 186 188 185 172 172 173 186 180
28 181 177 184 176 186 188 183 171 168 173 187 180
29 181 157 181 176 186 188 183 170 167 173 186 180
30 180   180 175 190 191 182 173 165 346 185 179
31 180   179   187   181 173   312   179