Overview Realtime Historical Map View
Heat Advisory
2026-07-15T20:00:00-05:00

* WHAT...Heat index values up to 102 expected. * WHERE...Portions of east central, south central and southeast Wisconsin. * WHEN...From noon today to 8 PM CDT Wednesday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses to occur.

Rock River At Horicon, Wi Historical Data

Historical Data


Streamflow Range


Date Average 2026 2025 2024 2023 2022 2021 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011
01-01 286.67
01-02 274.82
01-03 266.55
01-04 273.55
01-05 217.2
01-06 226.1
01-07 222.3
01-08 231.4
01-09 253.22
01-10 248.89
01-11 255.73
01-12 242.18
01-13 275.11
01-14 276.44
01-15 273.33
01-16 266.89
01-17 273.88
01-18 313.0
01-19 290.38
01-20 258.0
01-21 254.88
01-22 253.63
01-23 239.5
01-24 227.88
01-25 220.25
01-26 225.43
01-27 214.0
01-28 239.0
01-29 231.83
01-30 239.0
01-31 242.14
02-01 245.14
02-02 242.83
02-03 280.67
02-04 305.33
02-05 313.5
02-06 340.33
02-07 335.5
02-08 314.14
02-09 300.0
02-10 297.75
02-11 279.29
02-12 319.0
02-13 330.38
02-14 317.88
02-15 304.63
02-16 304.88
02-17 269.14
02-18 263.0
02-19 272.5
02-20 259.22
02-21 246.43
02-22 236.38
02-23 272.33
02-24 286.89
02-25 267.88
02-26 288.25
02-27 333.78
02-28 338.33
02-29 295.75
03-01 321.9
03-02 440.75
03-03 493.29
03-04 461.57
03-05 466.14
03-06 406.89
03-07 400.67
03-08 492.0
03-09 595.3
03-10 643.1
03-11 633.0
03-12 630.91
03-13 688.4
03-14 721.46
03-15 767.77
03-16 821.54
03-17 782.85
03-18 819.85
03-19 858.21
03-20 889.23
03-21 899.71
03-22 897.25
03-23 889.86
03-24 878.29
03-25 873.93
03-26 879.53
03-27 879.0
03-28 838.47
03-29 855.87
03-30 896.43
03-31 802.38
04-01 831.93
04-02 893.71
04-03 964.14
04-04 1003.79
04-05 1007.36
04-06 1060.73
04-07 1056.8
04-08 1059.33
04-09 1028.43
04-10 1028.13
04-11 1052.53
04-12 997.71
04-13 986.0
04-14 1016.21
04-15 982.83
04-16 1035.0
04-17 1024.38
04-18 1056.54
04-19 1063.46
04-20 1065.0
04-21 1093.36
04-22 1088.0
04-23 1071.5
04-24 1031.14
04-25 1053.46
04-26 1028.5
04-27 994.86
04-28 974.64
04-29 952.07
04-30 958.57
05-01 961.8
05-02 923.07
05-03 919.71
05-04 903.5
05-05 902.67
05-06 891.07
05-07 857.8
05-08 822.36
05-09 821.53
05-10 744.36
05-11 801.63
05-12 774.53
05-13 767.13
05-14 728.21
05-15 765.14
05-16 755.5
05-17 733.29
05-18 702.07
05-19 665.61
05-20 667.64
05-21 670.8
05-22 634.27
05-23 634.73
05-24 614.33
05-25 594.73
05-26 602.8
05-27 615.14
05-28 577.33
05-29 527.47
05-30 526.0
05-31 433.64
06-01 526.8
06-02 526.0
06-03 481.8
06-04 450.21
06-05 490.93
06-06 465.29
06-07 455.36
06-08 423.67
06-09 403.47
06-10 366.41
06-11 391.13
06-12 380.47
06-13 365.0
06-14 392.36
06-15 391.31
06-16 394.07
06-17 365.88
06-18 408.73
06-19 396.44
06-20 401.51
06-21 443.48
06-22 437.64
06-23 437.74
06-24 467.66
06-25 474.62
06-26 443.36
06-27 467.53
06-28 444.85
06-29 396.14
06-30 409.51
07-01 387.71
07-02 415.71
07-03 374.61
07-04 374.5
07-05 336.63
07-06 335.22
07-07 378.81
07-08 365.26
07-09 367.83
07-10 295.23
07-11 282.74
07-12 268.0
07-13 291.97
07-14 310.47
07-15 260.93
07-16 291.9
07-17 280.59
07-18 278.32
07-19 265.87
07-20 254.96
07-21 249.79
07-22 260.89
07-23 233.78
07-24 199.66
07-25 226.39
07-26 226.85
07-27 239.57
07-28 255.14
07-29 259.31
07-30 272.72
07-31 245.77
08-01 185.92
08-02 227.01
08-03 201.54
08-04 183.04
08-05 171.64
08-06 181.23
08-07 172.61
08-08 171.65
08-09 177.24
08-10 173.35
08-11 166.56
08-12 178.86
08-13 175.46
08-14 177.54
08-15 175.91
08-16 142.11
08-17 230.11
08-18 232.05
08-19 215.27
08-20 196.24
08-21 211.62
08-22 272.18
08-23 193.25
08-24 175.75
08-25 153.5
08-26 155.67
08-27 143.88
08-28 182.75
08-29 217.19
08-30 245.82
08-31 294.09
09-01 280.21
09-02 317.02
09-03 327.13
09-04 306.64
09-05 304.99
09-06 320.82
09-07 176.57
09-08 219.9
09-09 218.42
09-10 194.96
09-11 226.08
09-12 420.82
09-13 387.19
09-14 370.94
09-15 353.25
09-16 364.98
09-17 360.41
09-18 332.12
09-19 339.4
09-20 372.55
09-21 350.38
09-22 360.01
09-23 334.39
09-24 343.61
09-25 314.5
09-26 294.36
09-27 211.69
09-28 228.61
09-29 241.5
09-30 258.16
10-01 274.7
10-02 232.12
10-03 286.34
10-04 360.6
10-05 465.99
10-06 499.18
10-07 474.13
10-08 467.95
10-09 479.23
10-10 486.64
10-11 478.22
10-12 479.68
10-13 478.39
10-14 481.39
10-15 501.35
10-16 302.59
10-17 425.58
10-18 446.58
10-19 448.19
10-20 384.89
10-21 286.59
10-22 322.94
10-23 331.41
10-24 347.06
10-25 369.58
10-26 373.7
10-27 408.0
10-28 393.2
10-29 475.44
10-30 397.67
10-31 399.42
11-01 392.34
11-02 373.95
11-03 377.45
11-04 350.38
11-05 318.39
11-06 297.15
11-07 302.67
11-08 323.08
11-09 275.15
11-10 331.06
11-11 342.94
11-12 326.21
11-13 350.53
11-14 359.69
11-15 354.83
11-16 352.66
11-17 366.68
11-18 356.53
11-19 317.89
11-20 308.61
11-21 305.28
11-22 332.22
11-23 293.76
11-24 309.12
11-25 290.28
11-26 314.71
11-27 324.6
11-28 319.03
11-29 298.08
11-30 318.56
12-01 307.19
12-02 350.82
12-03 347.29
12-04 374.48
12-05 361.55
12-06 371.78
12-07 377.62
12-08 383.56
12-09 400.42
12-10 391.42
12-11 355.39
12-12 368.92
12-13 369.08
12-14 357.31
12-15 345.52
12-16 377.94
12-17 380.58
12-18 365.19
12-19 302.39
12-20 291.47
12-21 288.76
12-22 284.59
12-23 280.6
12-24 273.3
12-25 281.27
12-26 283.81
12-27 276.69
12-28 224.65
12-29 260.75
12-30 259.49
12-31 290.45

Annual Peak Streamflow


Seasonal Comparison


Oceanic Nino Index