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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 05459500 Winnebago River at Mason City, IA


Cerro Gordo County, Iowa
Hydrologic Unit Code 07080203
Latitude  43°09'54", Longitude  93°11'33" NAD83
Drainage area 526  square miles
Gage datum 1,069.51 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 1932-10-01 -> 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
1 125 76 305 915 547 564 563 226 241 234 218 154
2 118 72 287 825 563 548 516 224 214 240 223 153
3 109 73 303 768 566 514 478 228 197 244 214 148
4 100 76 330 758 559 493 441 220 187 250 204 146
5 100 80 378 776 562 483 430 223 197 255 199 142
6 107 82 422 789 547 454 453 217 194 250 199 140
7 98 77 410 766 520 485 410 211 215 249 198 138
8 92 80 366 724 508 645 420 221 229 248 189 138
9 86 94 360 678 523 611 421 217 231 257 184 130
10 85 93 388 661 533 598 409 243 219 256 192 121
11 83 108 468 672 520 547 408 220 203 245 193 119
12 79 99 514 695 528 614 374 199 188 252 193 127
13 78 107 529 700 536 645 381 212 199 244 193 132
14 78 116 570 705 531 573 406 222 210 224 191 137
15 73 125 591 662 501 575 369 204 250 212 187 142
16 75 124 637 632 486 560 340 196 265 204 187 137
17 78 143 610 601 499 594 357 199 244 200 190 130
18 83 164 616 572 516 598 366 195 230 199 191 125
19 80 165 603 585 503 639 405 198 263 199 190 119
20 80 192 665 622 499 624 392 207 315 204 189 118
21 81 209 645 615 538 644 384 216 305 202 198 115
22 91 214 622 600 623 665 341 247 327 210 196 115
23 92 219 626 601 577 679 322 276 299 221 188 112
24 91 204 626 576 592 711 297 276 271 223 181 110
25 89 194 648 561 562 729 283 274 263 216 175 115
26 84 213 713 541 551 724 278 252 264 213 168 117
27 80 241 737 525 563 693 271 244 250 218 168 125
28 79 296 733 561 576 639 259 250 255 211 161 140
29 77 366 764 558 600 638 250 290 262 208 159 137
30 76   881 548 645 613 236 264 244 217 155 136
31 76   924   586   232 307   210   131