Overview Realtime Historical Map View
Extreme Heat Warning
2026-08-21T20:00:00-07:00

* WHAT...Dangerously hot conditions with high temperatures ranging between 103 to 110 degrees and low temperatures 79 to 85 degrees. Major HeatRisk is expected. * WHERE...South Central Pinal County, Southeast Pinal County, Tohono O'odham Nation, Tucson Metro Area, Upper Gila River Valley, and Western Pima County. * WHEN...From 10 AM Monday to 8 PM MST Friday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events.

Santa Cruz River At Cortaro, Az. 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 69.85
01-02 74.9
01-03 62.19
01-04 74.33
01-05 64.51
01-06 64.98
01-07 65.61
01-08 104.2
01-09 69.19
01-10 61.92
01-11 59.39
01-12 64.52
01-13 61.58
01-14 64.33
01-15 63.77
01-16 69.38
01-17 363.52
01-18 232.51
01-19 80.75
01-20 62.74
01-21 65.23
01-22 70.99
01-23 66.59
01-24 73.84
01-25 62.13
01-26 58.44
01-27 66.38
01-28 67.56
01-29 64.03
01-30 63.11
01-31 268.16
02-01 120.43
02-02 63.71
02-03 63.32
02-04 62.8
02-05 74.22
02-06 64.98
02-07 60.35
02-08 60.9
02-09 62.88
02-10 61.23
02-11 87.22
02-12 66.97
02-13 65.49
02-14 61.87
02-15 72.71
02-16 138.76
02-17 66.86
02-18 61.91
02-19 61.0
02-20 60.99
02-21 64.27
02-22 60.59
02-23 78.3
02-24 89.59
02-25 134.35
02-26 84.8
02-27 70.8
02-28 66.89
02-29 65.65
03-01 63.41
03-02 64.9
03-03 60.22
03-04 62.29
03-05 61.04
03-06 57.02
03-07 61.16
03-08 59.64
03-09 59.01
03-10 58.18
03-11 57.49
03-12 58.67
03-13 56.03
03-14 55.38
03-15 58.19
03-16 59.14
03-17 59.18
03-18 59.65
03-19 84.47
03-20 63.68
03-21 58.39
03-22 53.7
03-23 56.77
03-24 57.59
03-25 58.85
03-26 57.5
03-27 58.89
03-28 58.73
03-29 59.12
03-30 57.68
03-31 57.14
04-01 57.01
04-02 58.6
04-03 55.69
04-04 53.85
04-05 50.3
04-06 51.11
04-07 55.06
04-08 58.15
04-09 57.03
04-10 52.21
04-11 58.61
04-12 56.19
04-13 56.01
04-14 57.55
04-15 51.38
04-16 54.95
04-17 54.61
04-18 52.78
04-19 56.92
04-20 59.49
04-21 53.5
04-22 52.6
04-23 52.6
04-24 52.18
04-25 50.78
04-26 51.32
04-27 52.58
04-28 54.14
04-29 53.66
04-30 51.76
05-01 50.88
05-02 52.9
05-03 52.64
05-04 53.09
05-05 52.98
05-06 51.4
05-07 51.69
05-08 51.56
05-09 49.14
05-10 50.71
05-11 51.11
05-12 52.99
05-13 50.87
05-14 53.75
05-15 52.09
05-16 52.33
05-17 53.61
05-18 52.07
05-19 49.24
05-20 48.79
05-21 47.93
05-22 48.89
05-23 47.11
05-24 48.33
05-25 45.49
05-26 52.73
05-27 54.61
05-28 51.59
05-29 52.82
05-30 47.81
05-31 48.44
06-01 48.06
06-02 50.14
06-03 51.53
06-04 48.75
06-05 49.64
06-06 49.9
06-07 43.47
06-08 48.55
06-09 45.34
06-10 48.33
06-11 47.2
06-12 47.66
06-13 48.56
06-14 47.04
06-15 48.95
06-16 46.29
06-17 48.47
06-18 96.48
06-19 46.06
06-20 49.24
06-21 47.61
06-22 47.24
06-23 47.73
06-24 49.55
06-25 47.68
06-26 48.34
06-27 47.02
06-28 41.94
06-29 47.77
06-30 46.08
07-01 44.64
07-02 44.56
07-03 47.54
07-04 216.05
07-05 58.75
07-06 161.27
07-07 46.48
07-08 55.66
07-09 49.91
07-10 56.78
07-11 58.16
07-12 52.39
07-13 65.71
07-14 100.89
07-15 64.09
07-16 248.92
07-17 599.39
07-18 57.18
07-19 49.49
07-20 58.73
07-21 67.66
07-22 52.09
07-23 237.57
07-24 270.29
07-25 116.89
07-26 357.31
07-27 65.31
07-28 66.22
07-29 104.4
07-30 168.85
07-31 164.71
08-01 116.31
08-02 60.59
08-03 198.72
08-04 63.16
08-05 56.01
08-06 57.83
08-07 66.44
08-08 55.98
08-09 52.51
08-10 70.92
08-11 68.65
08-12 71.76
08-13 200.06
08-14 96.72
08-15 207.13
08-16 63.11
08-17 80.6
08-18 265.15
08-19 144.72
08-20 183.05
08-21 218.81
08-22 241.62
08-23 67.3
08-24 169.22
08-25 276.8
08-26 75.09
08-27 62.79
08-28 54.84
08-29 111.34
08-30 53.17
08-31 55.39
09-01 146.53
09-02 68.09
09-03 100.79
09-04 70.28
09-05 93.5
09-06 131.29
09-07 61.38
09-08 85.0
09-09 282.41
09-10 61.34
09-11 677.54
09-12 66.64
09-13 99.25
09-14 60.09
09-15 57.01
09-16 232.14
09-17 53.73
09-18 54.81
09-19 56.97
09-20 221.79
09-21 51.05
09-22 77.21
09-23 59.87
09-24 58.61
09-25 113.28
09-26 68.17
09-27 63.55
09-28 57.07
09-29 63.7
09-30 58.18
10-01 54.69
10-02 53.65
10-03 54.8
10-04 57.07
10-05 55.59
10-06 125.61
10-07 54.19
10-08 54.66
10-09 69.52
10-10 63.26
10-11 49.21
10-12 53.56
10-13 366.37
10-14 131.65
10-15 63.26
10-16 59.79
10-17 59.11
10-18 61.72
10-19 54.54
10-20 61.17
10-21 60.17
10-22 301.17
10-23 56.79
10-24 58.02
10-25 59.21
10-26 56.85
10-27 60.36
10-28 58.68
10-29 57.82
10-30 55.56
10-31 60.74
11-01 46.84
11-02 58.11
11-03 53.68
11-04 56.55
11-05 52.03
11-06 53.66
11-07 55.28
11-08 52.54
11-09 57.55
11-10 56.27
11-11 56.36
11-12 55.24
11-13 58.89
11-14 57.33
11-15 53.91
11-16 56.67
11-17 59.44
11-18 59.12
11-19 58.63
11-20 60.21
11-21 83.25
11-22 55.74
11-23 71.2
11-24 57.05
11-25 52.97
11-26 54.04
11-27 52.01
11-28 54.11
11-29 53.26
11-30 59.7
12-01 119.21
12-02 59.04
12-03 55.78
12-04 58.9
12-05 57.64
12-06 58.36
12-07 58.19
12-08 55.29
12-09 55.93
12-10 62.1
12-11 56.06
12-12 60.13
12-13 60.95
12-14 81.67
12-15 59.08
12-16 65.47
12-17 60.91
12-18 84.55
12-19 57.95
12-20 56.49
12-21 56.21
12-22 56.17
12-23 102.34
12-24 53.76
12-25 56.25
12-26 49.02
12-27 56.36
12-28 64.45
12-29 57.75
12-30 64.75
12-31 60.62

Annual Peak Streamflow


Seasonal Comparison


Oceanic Nino Index