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USGS Daily Statistics for the Nation

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 08171400 San Marcos Rv nr Martindale, TX


Caldwell County, Texas
Hydrologic Unit Code 12100203
Latitude  29°49'56.23", Longitude  97°50'32.58" NAD83
Drainage area 547  square miles
Gage datum 480.26 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 2010-10-01 -> 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
1 223 230 210 212 240 482 259 203 202 191 1,180 224
2 252 226 212 223 227 478 250 204 198 185 408 221
3 323 255 210 224 218 497 248 203 202 185 344 240
4 278 234 209 206 484 413 248 204 209 180 314 230
5 260 233 213 203 293 387 245 203 206 180 304 236
6 250 224 208 206 244 372 240 200 200 173 275 229
7 244 220 206 222 230 344 235 208 202 171 266 255
8 242 217 206 203 267 326 231 200 197 170 266 269
9 241 216 221 197 631 313 239 198 232 172 263 237
10 232 216 224 196 336 302 232 196 255 167 260 231
11 230 217 221 192 352 301 233 195 210 168 251 227
12 228 215 224 190 321 295 228 194 200 167 244 224
13 225 212 219 216 355 293 223 190 198 180 237 231
14 222 216 219 193 310 301 224 191 200 743 232 240
15 220 215 214 192 298 301 226 194 204 300 234 233
16 221 210 211 192 308 296 226 212 204 241 231 229
17 231 211 213 192 465 321 222 224 202 224 232 225
18 244 215 207 255 564 302 223 209 208 210 231 221
19 245 214 210 228 439 285 221 202 200 203 228 236
20 233 246 246 242 504 284 221 201 199 201 224 221
21 229 256 240 251 353 276 216 210 172 200 221 216
22 286 231 231 236 327 287 215 209 180 196 225 217
23 243 232 227 232 315 280 219 207 189 201 223 212
24 256 224 222 231 1,170 274 220 202 178 220 220 211
25 414 217 218 225 1,020 268 219 198 178 232 220 209
26 272 214 213 217 1,000 262 217 219 299 240 224 207
27 243 213 212 219 605 267 224 266 262 219 219 244
28 236 212 298 217 543 264 215 250 234 206 219 263
29 235 201 273 222 559 311 212 212 271 198 226 235
30 229   228 218 511 266 206 211 208 985 230 226
31 229   219   518   205 209   2,100   229