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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
1 157 163 165 188 217 373 258 150 201 145 228 153
2 156 224 160 172 232 381 390 154 143 143 210 151
3 156 215 158 169 258 399 404 162 137 136 249 187
4 163 344 195 165 253 410 743 256 185 171 238 201
5 162 344 233 225 213 636 758 224 284 205 231 189
6 157 296 232 207 235 449 859 192 199 158 215 182
7 151 247 209 175 264 368 625 171 173 172 180 157
8 144 223 193 167 339 315 354 203 285 165 171 164
9 149 214 184 156 222 291 283 183 343 249 196 162
10 148 205 178 153 190 329 277 141 318 224 194 155
11 153 191 172 150 216 399 250 150 217 178 167 150
12 155 212 182 150 232 450 223 134 185 177 159 153
13 154 184 188 148 286 418 202 137 191 165 157 154
14 150 185 206 147 221 512 195 142 191 196 158 150
15 160 177 178 154 300 415 199 146 162 192 158 162
16 163 169 174 181 282 364 334 157 180 225 212 154
17 157 164 175 188 266 371 578 395 229 269 230 147
18 253 184 164 276 278 362 441 276 212 595 260 145
19 235 177 171 273 282 325 304 232 165 411 225 147
20 209 188 175 242 261 274 247 187 167 252 204 181
21 223 191 176 220 218 267 262 190 210 203 189 198
22 186 213 165 189 246 262 264 174 224 236 231 280
23 176 201 166 182 262 352 255 154 226 264 258 239
24 177 197 166 223 285 334 254 156 187 334 215 170
25 177 202 163 287 345 319 248 155 169 393 185 153
26 161 190 168 243 324 379 228 145 181 264 174 150
27 196 182 171 227 297 263 220 147 480 224 170 154
28 163 174 182 223 303 248 183 150 258 196 174 156
29 160 162 192 234 260 335 166 300 161 216 165 153
30 157   191 195 342 317 158 230 148 254 155 156
31 154   217   448   155 225   250   154