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USGS Daily Statistics for Iowa

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Boating safety tips are available from the U.S. Coast Guard.

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" NAD27
Drainage area 526  square miles
Gage datum 1,069.59 feet above NGVD29
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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 -> 2021-09-30)

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
1 127 76 292 927 540 564 554 229 240 240 220 156
2 120 71 275 835 552 549 503 225 214 246 226 155
3 110 72 294 777 549 513 460 230 194 250 217 151
4 101 76 322 768 541 491 425 223 180 256 207 149
5 101 79 370 786 543 480 412 226 192 261 202 145
6 108 82 415 800 531 450 437 220 192 256 202 143
7 99 76 404 776 500 483 394 204 215 255 201 141
8 93 79 359 733 488 651 405 207 231 254 191 141
9 87 93 354 686 498 617 408 211 233 263 186 132
10 86 93 383 669 514 605 396 242 221 262 195 124
11 84 108 466 681 508 552 397 219 205 251 195 121
12 80 99 516 706 517 624 362 197 190 258 193 130
13 79 108 532 679 528 658 365 212 201 249 194 134
14 78 115 576 691 513 583 394 223 214 228 192 139
15 74 115 598 654 480 581 358 205 255 216 188 144
16 75 117 641 627 471 567 331 198 271 209 189 137
17 78 139 612 592 489 605 353 201 249 204 192 130
18 83 162 624 564 511 609 365 197 235 203 193 126
19 80 163 613 580 501 651 408 200 269 204 193 121
20 81 191 676 618 498 635 396 208 323 208 192 120
21 81 210 655 609 533 657 389 218 313 207 201 117
22 92 214 628 597 612 652 344 251 335 215 200 117
23 93 220 629 600 567 663 325 282 307 226 191 114
24 92 205 628 575 583 697 299 283 277 228 184 112
25 90 194 652 563 552 707 285 281 268 221 178 116
26 84 214 715 544 540 701 281 258 270 217 172 118
27 80 225 742 529 554 677 274 246 255 222 171 126
28 80 275 741 565 569 622 262 238 261 213 164 141
29 77 380 776 554 597 622 254 276 268 209 162 138
30 76   898 543 646 601 239 255 249 218 158 138
31 75   942   585   235 305   211   133