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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 06483500 Rock River near Rock Valley, IA


Sioux County, Iowa
Hydrologic Unit Code 10170204
Latitude  43°12'54.3", Longitude  96°17'42.1" NAD83
Drainage area 1,592  square miles
Gage datum 1,223.39 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 1948-10-01 -> 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
1 177 141 510 1,900 972 1,100 1,260 327 240 345 372 269
2 179 141 653 1,880 1,050 951 1,070 308 237 363 404 264
3 179 144 664 1,760 1,030 903 969 325 238 362 372 256
4 173 147 768 1,810 952 850 1,000 312 230 358 335 244
5 169 142 764 1,850 875 858 1,060 306 255 370 317 238
6 162 144 792 1,950 870 930 952 332 291 380 310 238
7 157 144 753 2,150 943 1,010 831 325 254 388 302 234
8 158 145 641 2,030 988 1,170 764 338 242 405 297 228
9 154 175 575 1,740 1,150 1,030 800 321 237 431 292 221
10 146 344 567 1,400 1,040 885 775 312 240 449 291 216
11 144 346 667 1,200 985 814 804 345 242 428 301 214
12 142 259 910 1,220 915 823 919 347 248 408 319 223
13 141 244 1,040 1,330 859 1,070 816 327 292 382 331 221
14 140 227 1,310 1,280 845 1,370 775 301 371 357 332 219
15 137 236 1,500 1,140 827 1,250 692 300 392 347 329 218
16 136 228 1,260 1,080 775 1,230 617 350 345 354 323 219
17 132 242 1,150 1,020 763 1,760 615 339 353 363 322 224
18 130 252 1,170 984 768 1,780 654 311 356 366 327 232
19 136 301 1,210 983 759 1,560 567 309 349 372 338 235
20 143 384 1,240 957 742 1,570 521 317 455 372 347 210
21 149 320 1,260 930 739 1,930 511 324 577 357 333 197
22 146 295 1,220 957 770 3,150 564 328 526 346 320 190
23 143 327 1,250 1,060 754 2,050 555 372 507 354 302 185
24 137 370 1,160 1,210 766 1,770 540 325 548 362 288 177
25 132 377 1,160 1,100 791 1,450 559 265 557 352 281 180
26 130 333 1,130 940 817 1,390 547 248 588 341 278 178
27 131 335 1,220 928 868 1,250 486 278 473 329 272 193
28 131 390 1,520 946 1,030 1,180 467 270 392 319 268 192
29 133 542 1,890 969 1,040 1,070 414 260 344 311 274 182
30 136   2,020 959 1,050 1,210 425 278 335 310 273 187
31 139   1,960   1,150   373 287   332   189