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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 08181500 Medina Rv at San Antonio, TX


Bexar County, Texas
Hydrologic Unit Code 12100302
Latitude  29°15'50", Longitude  98°29'26" NAD27
Drainage area 1,317  square miles
Contributing drainage area 1,317  square miles
Gage datum 439.03 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 1938-10-01 -> 2025-09-30)

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
1 158 164 166 188 217 373 258 150 201 145 228 153
2 157 226 161 172 232 381 390 154 143 143 210 152
3 158 216 160 169 258 399 404 162 137 136 249 188
4 164 347 196 165 253 410 743 256 185 171 238 203
5 163 348 235 225 213 636 758 224 284 205 231 190
6 158 299 234 207 235 449 859 192 199 158 215 183
7 152 250 211 175 264 368 625 171 173 172 180 158
8 145 225 194 167 339 315 354 203 285 165 171 165
9 150 216 186 156 222 291 283 183 343 249 196 163
10 148 206 179 153 190 329 277 141 318 224 194 156
11 154 193 173 150 216 399 250 150 217 178 167 151
12 156 213 184 150 232 450 223 134 185 177 159 153
13 155 186 189 148 286 418 202 137 191 165 157 155
14 151 186 207 147 221 512 195 142 191 196 158 151
15 161 179 180 154 300 415 199 146 162 192 158 163
16 164 171 176 181 282 364 334 157 180 225 212 155
17 158 166 175 188 266 371 578 395 229 269 230 148
18 255 186 164 276 278 362 441 276 212 595 260 145
19 237 178 171 273 282 325 304 232 165 411 225 148
20 211 189 175 242 261 274 247 187 167 252 204 182
21 225 192 176 220 218 267 262 190 210 203 189 199
22 187 215 165 189 246 262 264 174 224 236 231 283
23 177 202 166 182 262 352 255 154 226 264 258 241
24 179 199 166 223 285 334 254 156 187 334 215 171
25 178 203 163 287 345 319 248 155 169 393 185 154
26 162 191 168 243 324 379 228 145 181 264 174 151
27 198 184 171 227 297 263 220 147 480 224 170 155
28 165 175 182 223 303 248 183 150 258 196 174 157
29 161 162 192 234 260 335 166 300 161 216 165 154
30 158   191 195 342 317 158 230 148 254 155 157
31 155   217   448   155 225   250   155