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USGS Daily Statistics for the Nation

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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 50027600 RIO GRANDE DE ARECIBO NR SAN PEDRO, PR


Arecibo Municipio, Puerto Rico
Hydrologic Unit Code 21010002
Latitude  18°23'55.75", Longitude  66°41'29.61" NAD27
Drainage area 173.7  square miles
Gage datum 49.2 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 2000-10-01 -> 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
1 151 283 240 279 451 345 324 408 512 564 640 574
2 293 276 223 268 497 442 344 376 551 583 549 587
3 291 255 219 275 526 409 283 473 951 538 562 537
4 276 335 222 285 437 437 239 384 741 632 647 451
5 234 333 252 266 422 504 312 393 572 611 732 403
6 209 238 310 382 542 443 294 322 543 616 812 399
7 264 260 247 456 842 395 275 347 757 971 723 377
8 308 226 228 369 822 508 271 289 718 1,130 955 344
9 278 239 309 340 882 476 338 328 625 727 781 399
10 290 267 283 319 735 410 254 327 658 745 662 368
11 329 218 235 366 654 425 263 329 562 1,180 693 603
12 274 227 261 338 489 469 299 358 615 904 659 512
13 246 276 313 291 488 390 361 366 704 836 1,380 346
14 333 231 290 399 412 338 415 557 711 761 1,230 378
15 319 255 239 343 540 368 398 598 749 768 1,010 383
16 315 292 215 392 495 353 292 486 799 700 936 398
17 263 245 224 427 456 392 259 504 723 719 726 381
18 279 240 206 394 525 329 313 406 1,130 689 707 377
19 346 189 248 413 478 284 280 457 1,570 695 715 353
20 338 203 273 407 486 400 323 453 2,150 671 759 326
21 274 225 234 428 518 345 336 443 1,260 640 688 291
22 260 213 204 363 453 353 330 491 1,270 586 691 322
23 277 331 206 440 440 392 338 656 970 563 692 328
24 266 257 247 384 580 254 293 834 788 680 650 258
25 304 199 270 475 526 325 261 555 705 708 592 204
26 240 211 282 521 499 307 304 500 709 835 571 301
27 233 206 228 427 446 379 290 544 678 631 584 304
28 253 220 479 508 567 361 357 554 661 638 552 393
29 224 222 393 533 728 337 378 476 729 714 529 399
30 285   246 510 486 285 506 614 619 744 481 338
31 245   308   423   662 604   701   278