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USGS Daily Statistics for the Nation

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 08374550 Rio Grande nr Castolon, TX


Brewster County, Texas
Hydrologic Unit Code 13040205
Latitude  29°08'16", Longitude 103°31'28" NAD27
Gage datum 2,109.60 feet above NAVD88
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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 2006-10-01 -> 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
1 216 169 107 75 52 522 436 710 1,480 2,800 696 312
2 218 167 103 76 50 629 623 681 1,730 2,570 660 337
3 222 163 97 75 48 825 1,070 1,170 2,280 2,390 577 324
4 225 164 93 74 47 691 1,160 999 1,680 2,270 706 330
5 219 158 89 71 68 551 763 711 1,180 2,090 915 331
6 214 155 86 72 54 417 806 625 1,370 1,910 571 329
7 210 154 84 71 93 280 628 692 2,200 1,790 514 320
8 212 148 83 70 43 360 435 617 1,830 1,900 496 324
9 242 142 80 90 55 306 473 650 2,150 1,620 450 315
10 331 140 79 72 177 246 272 750 2,370 1,700 435 305
11 248 147 81 84 211 266 280 807 2,530 1,710 421 312
12 218 147 81 86 299 131 223 1,000 3,250 1,360 416 309
13 198 132 86 108 141 126 348 1,060 2,990 1,380 405 305
14 190 131 95 139 89 438 282 1,330 2,880 1,180 402 301
15 186 125 104 186 130 355 277 862 3,630 1,080 385 301
16 282 119 102 89 201 176 545 819 3,920 1,010 372 306
17 199 116 95 69 131 190 535 880 4,160 1,110 370 302
18 189 159 106 67 92 249 357 1,070 4,450 1,130 372 279
19 185 228 150 70 82 281 476 1,150 4,340 1,130 375 263
20 179 228 106 68 82 586 997 1,250 4,630 1,130 368 252
21 175 239 113 59 718 269 1,060 1,280 4,470 1,180 364 245
22 173 252 110 59 147 132 1,010 1,120 4,390 1,200 356 239
23 176 231 137 60 288 175 1,140 1,230 4,200 1,130 336 236
24 173 221 106 77 354 340 737 1,280 4,170 1,070 329 227
25 173 218 97 57 275 235 662 1,390 4,050 1,080 326 223
26 177 228 87 53 423 168 838 1,540 3,750 967 318 225
27 175 202 95 51 425 341 800 1,500 3,500 892 312 225
28 173 133 117 50 773 429 655 1,230 3,370 846 337 225
29 172 67 98 49 409 524 697 1,500 3,550 780 374 221
30 170   83 49 337 466 746 1,300 3,110 753 344 223
31 170   77   626   644 1,710   748   220