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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 08172000 San Marcos Rv at Luling, TX


Caldwell County, Texas
Hydrologic Unit Code 12100203
Latitude  29°39'58", Longitude  97°39'02" NAD27
Drainage area 838  square miles
Contributing drainage area 838  square miles
Gage datum 322.05 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 1983-10-01 -> 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
1 388 368 384 402 353 793 690 279 247 211 748 355
2 380 378 381 358 357 617 661 276 241 209 445 357
3 462 430 402 358 336 817 822 278 227 224 399 371
4 399 679 612 366 453 1,050 792 272 232 236 563 473
5 376 701 608 488 423 714 673 263 228 215 625 392
6 366 508 485 481 426 524 844 256 247 234 436 349
7 353 452 432 403 336 898 532 251 301 220 394 331
8 352 437 407 497 323 718 463 251 264 214 349 455
9 367 408 390 384 434 691 403 246 335 413 345 370
10 394 417 399 358 447 925 379 242 309 253 324 369
11 367 409 389 356 426 807 360 237 259 245 307 348
12 352 469 789 457 361 737 364 234 276 249 300 373
13 362 385 655 367 348 662 342 231 261 315 303 350
14 388 364 499 392 407 599 324 227 235 574 330 330
15 381 361 412 369 411 546 342 225 243 473 361 373
16 411 357 423 346 409 466 340 227 239 297 781 459
17 402 352 491 353 457 431 364 242 295 390 638 367
18 568 392 422 460 628 475 419 284 240 2,450 843 347
19 438 356 393 378 482 451 353 242 242 740 485 364
20 375 434 456 349 583 400 352 228 254 610 436 417
21 357 537 429 357 414 410 661 246 249 395 428 729
22 361 499 405 342 492 583 622 231 228 401 1,120 1,210
23 376 439 387 317 473 980 403 241 231 459 1,070 1,000
24 359 490 359 421 1,050 559 406 237 228 603 628 590
25 715 536 345 395 812 462 444 233 231 596 569 458
26 472 536 340 359 765 437 405 252 223 459 485 447
27 539 447 406 344 577 409 341 594 261 397 470 459
28 454 410 437 331 478 397 325 428 230 357 437 480
29 398 354 526 309 562 417 316 253 307 329 383 454
30 394   392 307 671 551 325 236 230 370 365 407
31 376   482   838   297 278   1,390   409