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Winnebago River At Mason City, Ia Historical Data

Historical Data


Streamflow Range


Date Average 2026 2025 2024 2023 2022 2021 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011
01-01 450.75
01-02 404.0
01-03 462.0
01-04 458.33
01-05 413.67
01-06 358.0
01-07 363.0
01-08 340.67
01-09 281.67
01-10 178.33
01-11 167.33
01-12 369.0
01-13 330.5
01-14 337.0
01-15 88.4
01-16 44.3
01-17 105.0
01-18 70.5
01-19 108.0
01-20 139.0
01-21 139.0
01-23 49.0
01-24 88.0
01-25 99.0
01-26 78.5
01-27 87.5
01-28 101.0
01-29 98.5
01-30 69.33
01-31 98.5
02-01 100.0
02-02 79.0
02-03 179.25
02-04 225.33
02-05 228.0
02-06 59.33
02-07 175.0
02-08 171.75
02-09 165.75
02-10 40.5
02-11 51.5
02-12 40.5
02-13 43.5
02-14 46.5
02-15 50.0
02-16 49.5
02-17 46.0
02-18 44.0
02-19 44.0
02-20 43.0
02-21 39.0
02-22 44.5
02-23 74.0
02-24 76.0
02-25 43.5
02-26 409.0
02-27 391.0
02-28 465.0
02-29 780.5
03-01 582.33
03-02 724.0
03-03 418.33
03-04 351.33
03-05 307.33
03-06 305.67
03-07 337.67
03-08 372.33
03-09 378.67
03-10 721.25
03-11 654.25
03-12 837.0
03-13 736.0
03-14 592.87
03-15 553.63
03-16 510.53
03-17 581.99
03-18 540.63
03-19 496.69
03-20 1069.21
03-21 1094.18
03-22 855.35
03-23 918.58
03-24 880.99
03-25 861.15
03-26 801.79
03-27 772.87
03-28 775.87
03-29 830.33
03-30 772.73
03-31 720.86
04-01 857.87
04-02 758.6
04-03 744.27
04-04 704.6
04-05 746.0
04-06 674.27
04-07 631.13
04-08 598.6
04-09 539.93
04-10 610.27
04-11 703.33
04-12 746.0
04-13 781.93
04-14 1091.71
04-15 1067.46
04-16 914.85
04-17 804.38
04-18 746.77
04-19 756.08
04-20 818.38
04-21 862.64
04-22 867.0
04-23 889.07
04-24 830.64
04-25 666.92
04-26 760.79
04-27 693.57
04-28 684.79
04-29 776.21
04-30 784.36
05-01 800.33
05-02 766.14
05-03 815.14
05-04 908.93
05-05 883.33
05-06 892.8
05-07 812.13
05-08 715.64
05-09 720.93
05-10 655.36
05-11 643.67
05-12 705.13
05-13 691.0
05-14 664.58
05-15 751.38
05-16 681.24
05-17 644.59
05-18 780.11
05-19 750.82
05-20 925.95
05-21 919.4
05-22 939.53
05-23 891.93
05-24 852.07
05-25 856.0
05-26 855.4
05-27 1042.4
05-28 1093.6
05-29 1018.27
05-30 938.53
05-31 872.07
06-01 804.93
06-02 741.4
06-03 675.87
06-04 642.47
06-05 657.07
06-06 635.93
06-07 583.0
06-08 541.8
06-09 650.4
06-10 1001.07
06-11 733.93
06-12 690.36
06-13 898.86
06-14 766.14
06-15 744.33
06-16 809.6
06-17 832.02
06-18 862.02
06-19 798.71
06-20 975.79
06-21 1027.09
06-22 1217.84
06-23 1319.33
06-24 1301.85
06-25 1218.99
06-26 1322.49
06-27 1353.5
06-28 1178.21
06-29 1022.79
06-30 948.74
07-01 954.66
07-02 882.24
07-03 772.28
07-04 674.29
07-05 587.54
07-06 562.8
07-07 551.29
07-08 511.0
07-09 507.64
07-10 487.45
07-11 493.33
07-12 474.33
07-13 536.15
07-14 717.21
07-15 602.71
07-16 488.14
07-17 504.43
07-18 681.43
07-19 634.29
07-20 701.71
07-21 655.93
07-22 596.93
07-23 535.71
07-24 520.36
07-25 732.57
07-26 681.56
07-27 585.45
07-28 476.76
07-29 483.3
07-30 502.36
07-31 518.63
08-01 465.92
08-02 369.04
08-03 336.25
08-04 303.96
08-05 281.73
08-06 296.3
08-07 281.33
08-08 415.55
08-09 325.22
08-10 319.66
08-11 342.38
08-12 351.74
08-13 368.19
08-14 329.99
08-15 298.36
08-16 273.12
08-17 248.54
08-18 276.36
08-19 507.68
08-20 474.65
08-21 457.56
08-22 433.52
08-23 352.35
08-24 296.78
08-25 274.4
08-26 418.43
08-27 350.88
08-28 387.8
08-29 544.07
08-30 522.24
08-31 457.15
09-01 368.74
09-02 339.39
09-03 309.53
09-04 329.84
09-05 328.44
09-06 435.49
09-07 417.09
09-08 645.88
09-09 535.66
09-10 561.28
09-11 479.75
09-12 418.97
09-13 450.03
09-14 453.47
09-15 389.83
09-16 445.26
09-17 471.58
09-18 413.72
09-19 449.95
09-20 605.89
09-21 880.64
09-22 964.66
09-23 1133.01
09-24 905.24
09-25 786.09
09-26 703.73
09-27 601.51
09-28 563.84
09-29 514.88
09-30 476.36
10-01 338.76
10-02 360.01
10-03 399.12
10-04 373.49
10-05 421.9
10-06 533.25
10-07 471.44
10-08 494.51
10-09 558.41
10-10 619.95
10-11 550.84
10-12 492.5
10-13 450.54
10-14 424.74
10-15 441.4
10-16 279.3
10-17 364.08
10-18 366.05
10-19 347.18
10-20 323.42
10-21 226.97
10-22 354.37
10-23 359.94
10-24 334.28
10-25 316.13
10-26 310.29
10-27 404.24
10-28 368.99
10-29 359.71
10-30 350.85
10-31 331.73
11-01 311.27
11-02 308.72
11-03 290.74
11-04 284.51
11-05 281.36
11-06 253.21
11-07 256.33
11-08 245.48
11-09 235.36
11-10 226.95
11-11 223.92
11-12 246.16
11-13 240.02
11-14 251.24
11-15 254.51
11-16 242.4
11-17 227.5
11-18 214.13
11-19 225.36
11-20 217.92
11-21 243.79
11-22 298.55
11-23 266.72
11-24 292.66
11-25 277.9
11-26 277.78
11-27 275.16
11-28 236.55
11-29 315.27
11-30 285.82
12-01 279.0
12-02 295.17
12-03 284.42
12-04 301.1
12-05 313.44
12-06 295.71
12-07 270.88
12-08 283.71
12-09 323.13
12-10 289.67
12-11 281.0
12-12 239.71
12-13 182.67
12-14 128.57
12-15 116.47
12-16 158.83
12-17 417.29
12-18 465.2
12-19 431.8
12-20 194.25
12-21 159.5
12-22 338.2
12-23 323.8
12-24 427.75
12-25 416.25
12-26 394.5
12-27 369.5
12-28 381.0
12-29 209.33
12-30 537.0
12-31 486.75

Annual Peak Streamflow


Seasonal Comparison


Oceanic Nino Index