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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 -> 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
1 414 389 410 431 334 853 736 293 262 219 812 378
2 406 401 407 383 328 662 705 290 255 217 475 381
3 497 445 430 382 349 886 878 289 240 235 425 397
4 426 706 662 392 482 1,130 846 284 244 248 605 509
5 401 748 658 527 451 770 717 275 238 225 671 420
6 391 540 522 519 455 560 902 267 261 246 462 372
7 377 480 463 432 357 976 564 262 322 231 417 352
8 376 465 435 536 343 778 490 262 281 225 367 489
9 392 434 417 411 466 748 425 257 360 445 364 395
10 422 444 427 382 477 1,010 399 253 323 268 341 395
11 391 436 416 380 452 878 379 247 273 260 322 366
12 375 502 860 493 383 799 384 245 293 263 315 398
13 387 410 711 393 364 716 359 242 276 336 319 373
14 416 387 538 422 434 636 340 237 248 304 349 352
15 408 383 442 395 437 580 360 234 257 282 383 398
16 442 379 454 370 433 493 358 236 253 274 848 494
17 431 373 528 378 490 455 384 253 315 390 689 393
18 616 418 452 497 668 504 443 299 254 2,680 920 370
19 471 378 420 406 501 477 372 253 256 792 523 387
20 401 464 491 374 626 422 369 241 269 652 468 446
21 382 578 461 370 443 433 705 261 264 415 459 793
22 385 537 422 359 530 620 663 244 241 423 1,230 1,330
23 383 470 411 336 510 1,050 426 255 244 490 1,170 1,100
24 366 527 381 447 1,120 594 430 250 241 650 680 640
25 733 578 368 422 870 490 470 246 245 643 616 492
26 491 578 362 384 829 463 429 267 235 490 522 481
27 573 479 436 367 624 432 360 648 279 411 503 494
28 481 438 470 353 515 417 342 463 243 372 468 517
29 421 373 569 328 565 440 333 269 325 345 409 488
30 419   420 325 716 584 342 249 239 393 389 437
31 400   520   906   313 295   1,520   438