Overview Realtime Historical Map View

Willamette River At Portland, Or Historical Data

Historical Data


Streamflow Range


Date Average 2026 2025 2024 2023 2022 2021 2020 2019 2018 2017 2016 2015 2014 2013
01-01 56555.56
01-02 55900.0
01-03 54637.5
01-04 57333.33
01-05 63588.89
01-06 63055.56
01-07 64577.78
01-08 68400.0
01-09 70287.5
01-10 67550.0
01-11 65488.89
01-12 66500.0
01-13 62657.14
01-14 71677.78
01-15 75587.5
01-16 61625.0
01-17 54555.56
01-18 53750.0
01-19 69000.0
01-20 73655.56
01-21 74533.33
01-22 71570.0
01-23 69044.44
01-24 65170.0
01-25 63666.67
01-26 63033.33
01-27 62630.0
01-28 50666.67
01-29 59652.0
01-30 55835.45
01-31 55072.73
02-01 55332.0
02-02 54273.33
02-03 48954.55
02-04 45293.64
02-05 44820.0
02-06 44355.56
02-07 40300.0
02-08 37520.0
02-09 42070.91
02-10 43700.0
02-11 41521.11
02-12 41348.0
02-13 36650.0
02-14 37924.44
02-15 38695.45
02-16 38817.0
02-17 39878.0
02-18 42840.0
02-19 41954.55
02-20 39690.0
02-21 40781.82
02-22 38736.36
02-23 33911.11
02-24 39570.0
02-25 53166.67
02-26 51935.0
02-27 46434.55
02-28 44281.82
02-29 36333.33
03-01 44180.0
03-02 45763.64
03-03 47027.27
03-04 43772.73
03-05 39684.55
03-06 38388.89
03-07 36872.73
03-08 35172.73
03-09 32780.0
03-10 33301.0
03-11 36510.0
03-12 35090.91
03-13 38976.36
03-14 44327.27
03-15 48920.0
03-16 53027.27
03-17 50890.0
03-18 48330.0
03-19 47888.33
03-20 47830.0
03-21 48450.0
03-22 50490.91
03-23 45891.67
03-24 45764.17
03-25 46908.33
03-26 44350.0
03-27 40950.0
03-28 42291.67
03-29 42791.67
03-30 38470.0
03-31 39381.82
04-01 32843.64
04-02 31918.18
04-03 35958.33
04-04 31525.0
04-05 30765.83
04-06 29557.0
04-07 34282.5
04-08 40350.0
04-09 38300.0
04-10 50045.45
04-11 48816.67
04-12 38925.0
04-13 47928.18
04-14 50190.91
04-15 48830.0
04-16 44549.1
04-17 46044.44
04-18 38727.0
04-19 39500.0
04-20 38240.0
04-21 36460.0
04-22 34925.0
04-23 36450.0
04-24 35655.56
04-25 28888.89
04-26 28065.0
04-27 30716.67
04-28 30457.0
04-29 31372.73
04-30 26280.0
05-01 29637.0
05-02 24236.67
05-03 21796.0
05-04 25110.0
05-05 24587.27
05-06 23466.67
05-07 25933.0
05-08 24818.88
05-09 29345.0
05-10 28070.0
05-11 26169.0
05-12 25380.0
05-13 22167.0
05-14 26500.0
05-15 22575.0
05-16 27355.0
05-17 26287.0
05-18 26988.18
05-19 26792.22
05-20 26154.0
05-21 27494.44
05-22 23890.0
05-23 22845.0
05-24 20977.0
05-25 18480.0
05-26 18060.0
05-27 20430.0
05-28 18869.0
05-29 17467.0
05-30 17627.27
05-31 16246.36
06-01 17409.09
06-02 15950.0
06-03 16727.0
06-04 18284.44
06-05 18611.11
06-06 18110.0
06-07 16045.0
06-08 24166.67
06-09 20900.0
06-10 19516.0
06-11 24183.33
06-12 22011.11
06-13 21347.78
06-14 22080.0
06-15 24715.0
06-16 23655.56
06-17 20711.11
06-18 22721.25
06-19 22215.56
06-20 20449.22
06-21 19633.33
06-22 20150.0
06-23 17860.0
06-24 21071.43
06-25 17316.25
06-26 17605.0
06-27 14574.44
06-28 15001.0
06-29 14581.11
06-30 13420.75
07-01 19266.67
07-02 13772.86
07-03 14788.33
07-04 15775.0
07-05 17690.0
07-06 17438.0
07-07 13817.78
07-08 17825.0
07-09 16577.5
07-10 16537.5
07-11 16712.5
07-12 12090.13
07-13 12533.33
07-14 11748.75
07-15 13635.0
07-16 15178.5
07-17 15407.5
07-18 13161.25
07-19 18971.43
07-20 13681.43
07-21 15326.67
07-22 14271.43
07-23 13713.5
07-24 16980.0
07-25 19505.0
07-26 17016.67
07-27 13648.75
07-28 13238.57
07-29 15965.0
07-30 15391.43
07-31 17171.67
08-01 20326.0
08-02 14892.5
08-03 16265.0
08-04 16788.75
08-05 17204.44
08-06 17565.75
08-07 16020.0
08-08 15466.67
08-09 15851.43
08-10 13594.29
08-11 11873.75
08-12 13277.5
08-13 15313.33
08-14 15081.25
08-15 15481.25
08-16 19214.29
08-17 15001.67
08-18 14357.67
08-19 14808.89
08-20 11995.0
08-21 13120.0
08-22 10661.43
08-23 14931.25
08-24 18416.67
08-25 14152.86
08-26 11636.25
08-27 10141.25
08-28 14902.22
08-29 16437.5
08-30 13450.0
08-31 15294.44
09-01 15933.0
09-02 14007.78
09-03 13280.0
09-04 14328.89
09-05 14035.56
09-06 18185.0
09-07 14406.22
09-08 12482.5
09-09 13684.44
09-10 16901.43
09-11 14527.14
09-12 14035.0
09-13 19028.57
09-14 17453.2
09-15 15277.78
09-16 15021.11
09-17 18455.56
09-18 17322.22
09-19 13819.6
09-20 17070.0
09-21 17025.0
09-22 18650.0
09-23 13201.25
09-24 15466.25
09-25 13686.67
09-26 11643.0
09-27 13458.57
09-28 13602.86
09-29 15641.11
09-30 16871.11
10-01 21128.13
10-02 15597.5
10-03 18685.71
10-04 12324.44
10-05 15062.22
10-06 17342.86
10-07 18900.0
10-08 17606.67
10-09 19222.22
10-10 18247.78
10-11 15438.91
10-12 15144.55
10-13 15910.0
10-14 19100.0
10-15 20989.0
10-16 26071.43
10-17 19437.67
10-18 21587.67
10-19 21493.33
10-20 20407.33
10-21 27400.0
10-22 28071.43
10-23 29533.0
10-24 29780.0
10-25 28106.0
10-26 19542.0
10-27 24751.0
10-28 27244.44
10-29 28229.0
10-30 30245.45
10-31 27066.0
11-01 27322.22
11-02 20495.0
11-03 23573.75
11-04 24670.0
11-05 24052.0
11-06 33022.22
11-07 34188.89
11-08 33910.0
11-09 31740.0
11-10 26675.0
11-11 25187.0
11-12 30386.67
11-13 31041.11
11-14 28140.0
11-15 27432.0
11-16 35159.0
11-17 38622.22
11-18 36454.44
11-19 31091.0
11-20 36780.0
11-21 34217.91
11-22 37316.0
11-23 35000.0
11-24 35512.5
11-25 30030.0
11-26 40630.0
11-27 36262.5
11-28 40154.55
11-29 39145.45
11-30 39300.0
12-01 39336.36
12-02 38290.91
12-03 31326.0
12-04 37830.0
12-05 40383.64
12-06 41232.0
12-07 47344.44
12-08 54100.0
12-09 49602.1
12-10 48729.0
12-11 60840.0
12-12 63640.0
12-13 54740.0
12-14 55655.56
12-15 48355.56
12-16 54520.0
12-17 49144.44
12-18 50352.22
12-19 51830.0
12-20 54971.11
12-21 77960.0
12-22 90088.89
12-23 82710.0
12-24 71833.33
12-25 71255.56
12-26 57057.14
12-27 72275.0
12-28 66714.29
12-29 65662.5
12-30 61400.0
12-31 55737.5

Annual Peak Streamflow


Seasonal Comparison


Oceanic Nino Index