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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 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 -> 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
1 125 76 305 915 547 564 563 226 241 232 216 153
2 118 72 287 825 563 548 516 224 214 238 221 152
3 109 73 303 768 566 514 478 228 196 242 212 147
4 100 76 330 758 559 493 441 220 187 248 203 145
5 100 80 378 776 562 483 430 223 196 253 198 141
6 107 82 422 789 547 454 453 217 194 248 198 140
7 98 77 410 766 520 485 410 211 214 247 198 137
8 92 80 366 724 508 645 420 221 228 246 188 137
9 86 94 360 678 523 611 421 217 230 255 183 129
10 85 93 388 661 533 598 409 243 218 254 191 121
11 83 108 468 672 520 547 408 220 202 243 192 118
12 79 99 514 695 528 614 374 199 188 250 192 126
13 78 107 529 700 536 645 381 212 197 242 192 131
14 78 116 570 705 531 573 406 222 209 222 190 136
15 73 125 591 662 501 575 369 204 249 210 186 141
16 75 124 637 632 486 560 340 196 263 203 186 136
17 78 143 610 601 499 594 357 199 242 198 189 130
18 83 164 616 572 516 598 366 195 228 198 190 125
19 80 165 603 585 503 639 405 198 261 198 190 119
20 80 192 665 622 499 624 392 207 313 202 190 118
21 81 209 645 615 538 644 384 216 303 201 198 115
22 91 214 622 600 623 665 341 247 324 209 197 115
23 92 219 626 601 577 679 322 276 297 219 188 112
24 91 204 626 576 592 711 297 276 269 222 181 110
25 89 194 648 561 562 729 283 274 261 215 175 115
26 84 213 713 541 551 724 278 252 262 211 168 117
27 80 241 737 525 563 693 271 244 248 216 168 125
28 79 296 733 561 576 639 259 250 253 209 161 140
29 77 366 764 558 600 638 250 290 260 207 158 137
30 76   881 548 645 613 236 264 242 215 154 136
31 76   924   586   232 307   209   131