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USGS Daily Statistics for Iowa

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NOTE: Station Numbers for Iowa precipitation gages have changed (see list).


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
1 211 156 467 1,130 545 596 633 314 481 375 288 204
2 196 151 525 1,010 623 531 592 391 358 357 280 200
3 190 141 432 877 611 490 538 429 290 386 277 203
4 178 182 500 886 657 491 489 421 275 376 266 200
5 171 156 479 841 605 470 454 333 321 386 261 201
6 169 158 460 814 573 461 531 281 311 345 256 203
7 173 192 469 773 597 456 484 271 391 319 261 196
8 171 229 437 741 596 724 474 266 352 310 263 188
9 159 303 407 697 555 1,070 459 268 354 348 252 182
10 160 225 484 687 524 1,250 436 255 361 410 250 177
11 154 186 587 683 533 811 406 250 305 357 280 173
12 152 173 699 651 525 647 433 237 276 322 304 176
13 149 165 624 611 554 620 438 229 291 301 306 192
14 147 188 780 636 605 557 374 220 283 289 266 189
15 141 200 806 772 584 528 388 212 259 291 253 190
16 173 181 782 743 596 560 445 206 302 279 245 197
17 190 174 742 716 543 651 386 211 324 267 235 188
18 230 169 715 682 506 619 421 210 273 261 227 181
19 196 171 774 658 524 553 345 214 325 255 222 174
20 162 207 787 656 541 617 345 230 446 258 222 170
21 154 277 803 680 622 755 330 274 499 295 227 170
22 192 326 789 640 662 817 356 364 581 301 247 169
23 177 262 874 601 689 895 405 377 472 316 241 165
24 170 259 942 560 580 762 460 593 439 342 224 162
25 179 249 859 587 526 630 448 470 500 315 217 166
26 157 239 927 573 539 673 503 380 413 301 214 169
27 155 302 1,000 563 527 741 420 344 366 303 209 189
28 144 326 1,060 576 557 708 351 371 360 306 207 259
29 157 299 942 582 581 756 344 462 468 285 209 254
30 145   1,070 526 610 759 317 475 502 279 210 270
31 141   1,130   687   313 502   286   257