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Air Quality Alert
None

An Air Quality Alert has been issued by the following agencies: Washington Department of Ecology An Air Quality Alert has been issued for Chelan, Douglas, and Okanogan Counties until further notice due to current and expected smoke from regional fires. Particulate matter (PM2.5) may reach Unhealthy levels for areas downwind from active wildfires. Be sure to check air monitors in your area before outdoor activities. When air quality is Unhealthy, everyone should reduce exposure. Limit time outside, avoid strenuous outdoor activity, and follow tips for cleaner indoor air.

Chelan River At Chelan, Wa Historical Data

Historical Data


Streamflow Range


Date Average 2026 2025 2024 2023 2022 2021 2020 2019 2018 2017 2016 2015
01-01 271.59
01-02 292.92
01-03 294.3
01-04 262.07
01-05 263.67
01-06 262.43
01-07 213.61
01-08 207.65
01-09 214.59
01-10 239.43
01-11 207.53
01-12 231.49
01-13 217.96
01-14 218.08
01-15 221.15
01-16 220.42
01-17 195.77
01-18 215.89
01-19 199.92
01-20 118.3
01-21 101.71
01-22 83.32
01-23 132.51
01-24 200.26
01-25 213.39
01-26 213.41
01-27 196.86
01-28 216.33
01-29 197.22
01-30 185.71
01-31 184.06
02-01 193.3
02-02 196.0
02-03 184.85
02-04 182.42
02-05 197.46
02-06 192.58
02-07 191.78
02-08 204.91
02-09 174.01
02-10 195.24
02-11 203.43
02-12 158.01
02-13 113.39
02-14 92.72
02-15 91.26
02-16 92.49
02-17 93.04
02-18 80.86
02-19 79.95
02-20 80.6
02-21 80.97
02-22 81.14
02-23 80.76
02-24 80.83
02-25 82.21
02-26 147.7
02-27 139.86
02-28 140.47
02-29 270.1
03-01 79.96
03-02 226.49
03-03 206.42
03-04 203.9
03-05 197.12
03-06 196.58
03-07 191.01
03-08 189.58
03-09 184.12
03-10 183.25
03-11 166.16
03-12 140.33
03-13 147.06
03-14 139.35
03-15 140.1
03-16 136.65
03-17 142.81
03-18 136.72
03-19 125.12
03-20 126.76
03-21 143.74
03-22 150.21
03-23 144.0
03-24 142.13
03-25 141.15
03-26 142.2
03-27 142.74
03-28 142.21
03-29 131.32
03-30 121.88
03-31 125.79
04-01 141.59
04-02 140.41
04-03 140.57
04-04 142.13
04-05 148.97
04-06 166.75
04-07 150.63
04-08 152.97
04-09 159.17
04-10 149.0
04-11 150.98
04-12 158.41
04-13 150.65
04-14 149.65
04-15 130.34
04-16 108.59
04-17 108.34
04-18 106.78
04-19 106.64
04-20 107.21
04-21 127.04
04-22 140.13
04-23 140.46
04-24 152.58
04-25 140.21
04-26 129.29
04-27 128.22
04-28 522.37
04-29 476.38
04-30 225.57
05-01 158.45
05-02 130.62
05-03 131.78
05-04 155.65
05-05 915.85
05-06 907.44
05-07 899.49
05-08 1028.29
05-09 931.92
05-10 912.16
05-11 842.61
05-12 985.39
05-13 985.03
05-14 1084.66
05-15 1023.5
05-16 1354.1
05-17 1683.12
05-18 1539.28
05-19 1587.67
05-20 1441.23
05-21 1432.32
05-22 1283.58
05-23 1663.8
05-24 1792.11
05-25 1976.91
05-26 1839.92
05-27 1914.71
05-28 2057.77
05-29 1910.21
05-30 1905.78
05-31 1977.22
06-01 1667.8
06-02 1752.78
06-03 1557.24
06-04 1810.22
06-05 1521.69
06-06 1502.91
06-07 1788.39
06-08 1790.26
06-09 1403.69
06-10 1208.54
06-11 990.2
06-12 959.51
06-13 1036.66
06-14 1299.91
06-15 1164.0
06-16 889.0
06-17 796.55
06-18 806.2
06-19 954.16
06-20 1009.52
06-21 996.3
06-22 1105.57
06-23 1181.21
06-24 1275.78
06-25 1420.37
06-26 1303.34
06-27 1362.35
06-28 1537.04
06-29 1311.39
06-30 1323.12
07-01 1215.03
07-02 1301.8
07-03 1331.22
07-04 1131.78
07-05 1011.45
07-06 764.36
07-07 707.27
07-08 804.11
07-09 711.5
07-10 571.09
07-11 497.53
07-12 450.22
07-13 491.99
07-14 366.45
07-15 347.64
07-16 383.23
07-17 275.37
07-18 300.96
07-19 253.89
07-20 201.52
07-21 453.16
07-22 582.64
07-23 494.78
07-24 374.13
07-25 366.35
07-26 323.5
07-27 300.63
07-28 302.02
07-29 272.37
07-30 297.1
07-31 271.87
08-01 276.1
08-02 251.58
08-03 241.03
08-04 260.32
08-05 237.39
08-06 235.67
08-07 210.77
08-08 225.21
08-09 226.07
08-10 231.69
08-11 202.7
08-12 207.05
08-13 213.71
08-14 238.02
08-15 241.92
08-16 260.89
08-17 279.7
08-18 278.26
08-19 258.48
08-20 189.07
08-21 114.8
08-22 79.18
08-23 78.49
08-24 79.73
08-25 79.82
08-26 79.09
08-27 78.21
08-28 146.46
08-29 148.32
08-30 147.21
08-31 152.52
09-01 146.77
09-02 145.9
09-03 145.92
09-04 148.73
09-05 146.42
09-06 145.6
09-07 149.92
09-08 183.8
09-09 185.22
09-10 182.13
09-11 223.78
09-12 240.68
09-13 258.81
09-14 237.57
09-15 242.59
09-16 152.4
09-17 136.89
09-18 157.79
09-19 220.77
09-20 288.22
09-21 288.83
09-22 291.84
09-23 252.67
09-24 240.2
09-25 234.03
09-26 233.08
09-27 298.44
09-28 287.99
09-29 278.43
09-30 317.0
10-01 77.71
10-02 78.86
10-03 78.2
10-04 78.99
10-05 167.49
10-06 169.81
10-07 167.45
10-08 153.01
10-09 119.85
10-10 114.32
10-11 97.47
10-12 97.48
10-13 98.06
10-14 98.6
10-15 100.14
10-16 78.49
10-17 98.14
10-18 97.24
10-19 99.51
10-20 78.9
10-21 78.41
10-22 80.91
10-23 79.8
10-24 79.84
10-25 80.27
10-26 81.09
10-27 80.47
10-28 81.46
10-29 81.03
10-30 81.47
10-31 82.08
11-01 82.36
11-02 81.69
11-03 106.51
11-04 101.65
11-05 103.99
11-06 106.24
11-07 106.89
11-08 107.13
11-09 105.77
11-10 105.28
11-11 103.78
11-12 103.76
11-13 103.19
11-14 100.78
11-15 99.11
11-16 99.54
11-17 81.53
11-18 103.9
11-19 128.26
11-20 125.59
11-21 123.59
11-22 134.71
11-23 135.15
11-24 135.93
11-25 134.28
11-26 133.16
11-27 128.11
11-28 126.96
11-29 124.15
11-30 127.88
12-01 128.33
12-02 194.66
12-03 190.5
12-04 176.26
12-05 173.19
12-06 178.66
12-07 183.11
12-08 171.98
12-09 171.86
12-10 183.74
12-11 171.59
12-12 236.97
12-13 260.54
12-14 277.86
12-15 259.19
12-16 265.6
12-17 330.84
12-18 328.67
12-19 370.5
12-20 333.35
12-21 344.97
12-22 252.8
12-23 227.79
12-24 219.34
12-25 226.79
12-26 238.14
12-27 241.65
12-28 263.74
12-29 236.79
12-30 264.97
12-31 248.56

Annual Peak Streamflow


Seasonal Comparison


Oceanic Nino Index