Warning: Javascript must be enabled to use all the features on this page!


Page Loading - Please Wait...

Click to hideNews Bulletins

USGS Daily Statistics for Texas

Click to hide state-specific text

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.

Click to go to the Texas Water Dashboard Click to go to the WATER On-the-go app

Follow @USGS_TexasFlood and @USGS_TexasRain on Twitter to get current water level and precipitation data during flooding or severe rainfall events.


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 08151500 Llano Rv at Llano, TX


Llano County, Texas
Hydrologic Unit Code 12090204
Latitude  30°45'04", Longitude  98°40'10" NAD27
Drainage area 4,197  square miles
Contributing drainage area 4,192  square miles
Gage datum 970.01 feet above NGVD29
Output formats
HTML table of all data
Tab-separated data
Reselect output format

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 -> 2020-09-30)

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
1 454 262 255 239 342 510 365 166 276 206 289 201
2 246 305 284 224 451 598 239 219 256 180 265 196
3 235 362 257 219 884 415 269 811 216 184 463 196
4 225 860 280 222 429 622 381 194 180 729 1,330 196
5 234 430 242 227 334 756 335 149 237 861 436 203
6 229 356 322 286 333 539 463 145 208 271 568 208
7 224 276 362 263 309 438 245 151 195 279 377 204
8 230 248 281 258 284 292 200 140 1,100 387 364 220
9 217 300 284 246 404 495 171 125 503 544 301 224
10 211 249 436 281 460 360 159 133 954 503 267 223
11 208 230 570 347 638 325 220 191 863 293 252 306
12 202 238 552 264 616 403 642 291 230 279 240 218
13 208 238 403 233 551 364 236 342 197 1,020 224 203
14 202 232 319 209 490 288 180 223 183 1,650 213 203
15 205 222 274 339 469 274 169 205 180 1,200 329 259
16 207 269 334 764 557 415 185 533 215 2,490 623 225
17 245 257 275 371 555 522 251 378 254 650 770 211
18 340 293 394 326 585 860 199 245 651 434 425 207
19 353 258 318 343 716 665 193 191 317 578 363 224
20 488 752 329 302 497 397 252 186 251 641 279 645
21 528 362 330 371 398 237 178 157 232 332 255 614
22 290 358 329 336 370 607 146 146 410 259 231 328
23 238 509 269 497 282 1,190 146 249 506 250 233 268
24 224 468 242 547 409 420 147 337 759 604 250 224
25 211 447 234 656 567 994 171 257 554 406 285 208
26 222 403 271 378 674 578 181 213 308 287 235 223
27 236 320 344 478 661 847 176 202 479 259 224 232
28 217 279 328 459 663 362 143 203 281 767 225 217
29 312 239 278 408 538 410 132 689 223 818 219 213
30 242   251 364 461 402 123 598 259 419 210 274
31 228   267   463   137 442   368   807