Overview Realtime Historical Map View

Illinois River At Henry, Il 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 20005.0
01-02 19053.33
01-03 18229.09
01-04 17160.0
01-05 16074.17
01-06 15864.55
01-07 14912.73
01-08 13772.73
01-09 13340.0
01-10 13439.17
01-11 13861.67
01-12 15075.83
01-13 16767.5
01-14 15541.82
01-15 15116.36
01-16 14880.0
01-17 14141.82
01-18 12570.0
01-19 13107.5
01-20 12952.5
01-21 11923.33
01-22 11511.67
01-23 11819.09
01-24 12695.45
01-25 12958.18
01-26 12171.11
01-27 12095.56
01-28 12253.0
01-29 12285.0
01-30 10990.91
01-31 11462.5
02-01 14433.08
02-02 14665.38
02-03 14623.08
02-04 14577.69
02-05 14706.92
02-06 15223.33
02-07 15528.33
02-08 15395.83
02-09 14817.69
02-10 14175.38
02-11 13690.0
02-12 13621.54
02-13 13091.85
02-14 13269.92
02-15 12633.85
02-16 13776.92
02-17 12308.33
02-18 11324.62
02-19 13024.62
02-20 13323.57
02-21 16465.0
02-22 19239.29
02-23 22152.86
02-24 24455.0
02-25 18846.92
02-26 18526.15
02-27 22430.0
02-28 22497.86
02-29 13300.0
03-01 21972.86
03-02 21960.0
03-03 20365.0
03-04 19448.57
03-05 19101.43
03-06 19738.57
03-07 20568.57
03-08 20173.57
03-09 19269.29
03-10 19446.92
03-11 23985.71
03-12 26314.29
03-13 26850.0
03-14 25264.29
03-15 25600.0
03-16 26085.71
03-17 25614.29
03-18 24607.14
03-19 20415.71
03-20 19938.46
03-21 21900.0
03-22 20532.86
03-23 21235.71
03-24 18906.67
03-25 19866.67
03-26 19660.0
03-27 19660.0
03-28 19540.0
03-29 18800.0
03-30 18606.67
03-31 20421.43
04-01 22046.67
04-02 23966.67
04-03 25426.67
04-04 26473.33
04-05 26241.33
04-06 26067.33
04-07 26635.33
04-08 26075.33
04-09 25155.0
04-10 23966.0
04-11 23125.33
04-12 19844.14
04-13 20551.36
04-14 21042.86
04-15 19594.62
04-16 20346.92
04-17 21269.23
04-18 21326.92
04-19 26788.46
04-20 28942.31
04-21 18262.31
04-22 18415.38
04-23 17291.54
04-24 16540.77
04-25 16379.17
04-26 15430.0
04-27 16511.54
04-28 16510.77
04-29 15781.54
04-30 20602.31
05-01 26590.0
05-02 24879.23
05-03 30165.0
05-04 28335.0
05-05 29473.33
05-06 27806.0
05-07 25381.54
05-08 22733.33
05-09 25242.86
05-10 27740.77
05-11 27693.57
05-12 27095.0
05-13 26622.14
05-14 24450.77
05-15 25769.23
05-16 27592.31
05-17 27525.0
05-18 25412.86
05-19 26358.57
05-20 27591.67
05-21 25030.71
05-22 20960.0
05-23 21969.23
05-24 21735.0
05-25 21975.0
05-26 20316.43
05-27 20897.86
05-28 22431.33
05-29 23034.0
05-30 22976.0
05-31 24139.33
06-01 23444.67
06-02 21436.67
06-03 20821.33
06-04 18722.67
06-05 18965.71
06-06 17733.57
06-07 17282.86
06-08 16914.0
06-09 16809.33
06-10 18434.67
06-11 21311.54
06-12 20170.77
06-13 19606.92
06-14 19335.38
06-15 21915.0
06-16 24654.62
06-17 23332.14
06-18 23510.0
06-19 23506.92
06-20 23003.08
06-21 23645.0
06-22 24317.14
06-23 26510.71
06-24 27917.14
06-25 25747.86
06-26 25239.29
06-27 25479.23
06-28 25225.71
06-29 24409.29
06-30 25404.29
07-01 26502.31
07-02 25305.0
07-03 23604.29
07-04 22667.14
07-05 21035.33
07-06 21034.67
07-07 20857.14
07-08 18832.31
07-09 17480.71
07-10 15942.67
07-11 16173.57
07-12 12139.29
07-13 13930.0
07-14 16012.86
07-15 16528.57
07-16 16236.15
07-17 14379.29
07-18 14937.14
07-19 15312.31
07-20 15610.71
07-21 15677.86
07-22 14370.71
07-23 14720.0
07-24 15883.85
07-25 16990.0
07-26 15980.0
07-27 14687.86
07-28 13555.71
07-29 13107.86
07-30 12532.14
07-31 12467.69
08-01 12157.27
08-02 9578.57
08-03 8835.71
08-04 8161.54
08-05 7748.57
08-06 7425.57
08-07 7510.0
08-08 6446.15
08-09 6899.23
08-10 6928.46
08-11 6750.0
08-12 7216.43
08-13 6455.17
08-14 6900.77
08-15 7022.86
08-16 7218.46
08-17 6799.17
08-18 8538.33
08-19 8148.85
08-20 8815.38
08-21 9265.38
08-22 9965.38
08-23 9776.29
08-24 8446.92
08-25 8303.33
08-26 9427.86
08-27 9269.29
08-28 9130.21
08-29 9389.29
08-30 9239.29
08-31 9180.0
09-01 8948.46
09-02 8170.71
09-03 7220.0
09-04 6701.54
09-05 7224.15
09-06 7377.69
09-07 7105.71
09-08 7648.85
09-09 7675.0
09-10 7297.86
09-11 8992.31
09-12 9755.57
09-13 9449.79
09-14 9530.71
09-15 9080.5
09-16 9522.31
09-17 8788.57
09-18 8936.92
09-19 9890.0
09-20 10080.46
09-21 7938.18
09-22 8894.17
09-23 9060.0
09-24 8721.54
09-25 8665.38
09-26 7355.38
09-27 7594.62
09-28 7690.0
09-29 9887.69
09-30 9948.46
10-01 10402.73
10-02 9510.83
10-03 8040.83
10-04 10208.18
10-05 9495.38
10-06 9678.46
10-07 9960.77
10-08 11194.62
10-09 10614.62
10-10 9654.29
10-11 9435.38
10-12 9222.31
10-13 9712.31
10-14 9847.69
10-15 11294.62
10-16 12240.0
10-17 12487.14
10-18 11692.86
10-19 10864.43
10-20 10101.79
10-21 10061.75
10-22 9437.69
10-23 8917.92
10-24 9058.46
10-25 9901.54
10-26 12179.23
10-27 13530.0
10-28 15915.83
10-29 15852.5
10-30 14411.54
10-31 12298.46
11-01 17120.0
11-02 16329.09
11-03 14136.33
11-04 12767.69
11-05 12669.23
11-06 9793.64
11-07 10436.36
11-08 9535.45
11-09 9802.5
11-10 10595.0
11-11 10246.0
11-12 9173.64
11-13 9161.82
11-14 9202.31
11-15 9045.38
11-16 9078.46
11-17 8434.62
11-18 8853.64
11-19 9315.0
11-20 10090.0
11-21 10858.46
11-22 11655.83
11-23 11061.67
11-24 8695.45
11-25 9332.5
11-26 11185.38
11-27 11932.31
11-28 11105.0
11-29 13912.31
11-30 13536.15
12-01 14826.67
12-02 14781.67
12-03 14675.83
12-04 14011.54
12-05 13909.23
12-06 12896.67
12-07 12388.33
12-08 11100.77
12-09 10680.0
12-10 10325.38
12-11 10275.38
12-12 10611.54
12-13 10382.31
12-14 10030.0
12-15 9321.54
12-16 10886.92
12-17 13663.85
12-18 12908.46
12-19 12594.62
12-20 10940.0
12-21 10980.83
12-22 12003.08
12-23 11146.92
12-24 12011.54
12-25 12344.62
12-26 12196.67
12-27 12610.91
12-28 12918.33
12-29 11045.45
12-30 18744.17
12-31 20853.33

Annual Peak Streamflow


Seasonal Comparison


Oceanic Nino Index