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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 05387500 Upper Iowa River at Decorah, IA


Winneshiek County, Iowa
Hydrologic Unit Code 07060002
Latitude  43°18'17.7", Longitude  91°47'43.4" NAD27
Drainage area 511  square miles
Gage datum 850.07 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 1951-10-01 -> 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
1 209 155 459 1,110 542 599 633 314 481 375 288 204
2 194 150 517 993 620 535 592 391 358 357 280 200
3 188 140 425 865 614 493 538 429 290 386 277 203
4 176 180 492 874 667 493 489 421 275 376 266 200
5 170 155 471 829 616 477 454 333 321 386 261 201
6 167 157 453 803 582 480 531 281 311 345 256 203
7 171 190 462 763 603 470 484 271 391 319 261 196
8 169 227 430 732 602 727 474 266 352 310 263 188
9 157 300 401 688 562 1,060 459 268 354 348 252 182
10 158 223 477 679 533 1,240 436 255 361 410 250 177
11 153 185 578 674 543 807 406 250 305 357 280 173
12 150 172 688 643 532 645 433 237 276 322 304 174
13 146 164 614 604 559 619 438 229 291 301 306 189
14 144 187 767 628 608 557 374 220 283 289 266 187
15 139 199 793 761 586 528 388 212 259 291 253 188
16 171 180 769 733 598 558 445 206 302 279 245 195
17 187 172 730 710 545 648 386 211 324 267 235 186
18 227 167 703 679 508 618 421 210 273 261 227 179
19 194 169 761 658 524 553 345 214 325 255 222 172
20 161 205 774 655 541 615 345 230 446 258 222 168
21 152 274 790 678 638 751 330 274 499 295 227 169
22 190 322 776 638 690 831 356 364 581 301 247 168
23 175 259 859 599 711 996 405 377 472 316 241 164
24 168 256 926 558 595 762 460 593 439 342 224 161
25 177 246 845 583 542 630 448 470 500 315 217 164
26 155 236 912 569 557 673 503 380 413 301 214 167
27 154 298 988 559 545 741 420 344 366 303 209 187
28 143 321 1,050 572 571 708 351 371 360 306 207 256
29 156 282 929 579 590 756 344 462 468 285 209 251
30 144   1,050 523 616 759 317 475 502 279 210 266
31 140   1,110   690   313 502   286   254