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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 76 303 912 549 561 573 226 241 232 216 153
2 118 72 285 825 564 545 524 224 214 238 221 152
3 109 73 301 771 567 512 485 228 196 242 212 147
4 100 76 328 759 560 496 446 220 187 248 203 145
5 100 80 375 776 562 486 434 223 196 253 198 141
6 106 82 419 788 547 457 460 217 194 248 198 140
7 97 76 407 763 520 487 417 211 214 247 198 137
8 92 79 364 721 507 645 426 221 228 246 188 137
9 86 94 359 676 521 612 427 217 230 255 183 129
10 85 93 388 658 531 598 415 243 218 254 191 121
11 83 107 469 669 518 547 419 220 202 243 192 118
12 79 99 516 692 526 628 384 199 188 250 192 126
13 78 107 530 697 534 659 389 212 197 242 192 131
14 77 115 571 701 528 585 412 222 209 222 190 136
15 73 124 591 659 498 585 369 204 249 210 186 141
16 75 123 635 629 483 576 340 196 263 203 186 136
17 78 141 608 598 496 616 357 199 242 198 189 129
18 82 163 614 570 513 614 366 195 228 198 190 125
19 79 164 600 584 501 653 405 198 261 198 190 119
20 80 190 661 620 497 642 392 207 313 202 190 118
21 80 208 642 616 540 664 384 216 303 201 198 115
22 90 212 619 601 624 682 341 247 324 209 197 115
23 92 217 624 601 577 694 322 276 297 219 188 112
24 91 202 624 576 592 723 297 276 269 222 181 110
25 89 193 646 562 561 739 283 274 261 215 175 114
26 83 212 710 542 550 741 278 252 262 211 168 116
27 79 239 733 525 561 726 271 244 248 216 168 125
28 79 294 729 561 574 660 259 250 253 209 161 140
29 77 366 760 560 598 653 250 290 260 207 158 137
30 76   876 551 642 624 236 264 242 215 154 137
31 76   920   583   232 307   209   132