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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 1,110 545 596 633 314 481 375 288 204
2 194 150 517 993 623 531 592 391 358 357 280 200
3 188 140 425 877 611 490 538 429 290 386 277 203
4 176 180 492 886 657 491 489 421 275 376 266 200
5 170 155 471 841 605 470 454 333 321 386 261 201
6 167 157 453 814 573 461 531 281 311 345 256 203
7 171 190 462 773 597 456 484 271 391 319 261 196
8 169 227 430 741 596 724 474 266 352 310 263 188
9 157 300 401 697 555 1,070 459 268 354 348 252 182
10 158 223 477 687 524 1,250 436 255 361 410 250 177
11 153 185 578 683 533 811 406 250 305 357 280 173
12 150 172 688 651 525 647 433 237 276 322 304 174
13 146 164 614 611 554 620 438 229 291 301 306 189
14 144 187 767 636 605 557 374 220 283 289 266 187
15 139 199 793 772 584 528 388 212 259 291 253 188
16 171 180 769 743 596 560 445 206 302 279 245 195
17 187 172 730 716 543 651 386 211 324 267 235 186
18 227 167 703 682 506 619 421 210 273 261 227 179
19 194 169 761 658 524 553 345 214 325 255 222 172
20 161 205 774 656 541 617 345 230 446 258 222 168
21 152 274 790 680 622 755 330 274 499 295 227 169
22 190 322 776 640 662 817 356 364 581 301 247 168
23 175 259 859 601 689 895 405 377 472 316 241 164
24 168 256 926 560 580 762 460 593 439 342 224 161
25 177 246 845 587 526 630 448 470 500 315 217 164
26 155 236 912 573 539 673 503 380 413 301 214 167
27 154 298 988 563 527 741 420 344 366 303 209 187
28 143 321 1,050 576 557 708 351 371 360 306 207 256
29 156 282 929 582 581 756 344 462 468 285 209 251
30 144   1,050 526 610 759 317 475 502 279 210 266
31 140   1,110   687   313 502   286   254