Overview Realtime Historical Map View
Heat Advisory
2026-07-15T21:00:00-04:00

* WHAT...Heat index values up to 101 expected. * WHERE...Portions of southern Connecticut, northeast New Jersey, and southeast New York. * WHEN...Until 9 PM EDT Wednesday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.

Coginchaug River At Middlefield, Ct Historical Data

Historical Data


Streamflow Range


Date Average 2026 2025 2024 2023 2022 2021 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011
01-01 108.64
01-02 98.93
01-03 87.7
01-04 80.47
01-05 66.88
01-06 67.77
01-07 73.44
01-08 77.58
01-09 60.07
01-10 91.22
01-11 118.27
01-12 103.85
01-13 111.49
01-14 115.63
01-15 97.42
01-16 82.97
01-17 77.28
01-18 72.17
01-19 79.46
01-20 77.6
01-21 81.19
01-22 64.24
01-23 55.68
01-24 79.25
01-25 146.96
01-26 159.23
01-27 158.89
01-28 128.36
01-29 110.05
01-30 92.76
01-31 74.46
02-01 64.63
02-02 59.37
02-03 54.93
02-04 59.83
02-05 89.96
02-06 79.75
02-07 80.33
02-08 82.27
02-09 82.06
02-10 74.77
02-11 66.25
02-12 72.2
02-13 71.08
02-14 56.33
02-15 60.05
02-16 57.98
02-17 60.51
02-18 77.44
02-19 71.47
02-20 66.27
02-21 61.94
02-22 53.04
02-23 67.03
02-24 83.16
02-25 118.89
02-26 126.01
02-27 114.78
02-28 129.96
02-29 117.75
03-01 129.63
03-02 111.57
03-03 116.57
03-04 116.64
03-05 104.22
03-06 100.75
03-07 115.12
03-08 128.3
03-09 103.94
03-10 123.18
03-11 121.74
03-12 119.15
03-13 133.04
03-14 153.34
03-15 151.67
03-16 136.09
03-17 135.7
03-18 136.56
03-19 110.63
03-20 102.66
03-21 95.5
03-22 87.44
03-23 76.53
03-24 111.37
03-25 114.77
03-26 99.76
03-27 89.89
03-28 90.41
03-29 101.9
03-30 107.12
03-31 134.14
04-01 117.57
04-02 113.41
04-03 102.09
04-04 104.04
04-05 117.45
04-06 100.77
04-07 93.47
04-08 94.67
04-09 99.66
04-10 84.79
04-11 73.24
04-12 62.44
04-13 63.64
04-14 101.12
04-15 95.06
04-16 96.18
04-17 128.04
04-18 103.39
04-19 85.83
04-20 82.37
04-21 80.24
04-22 81.04
04-23 81.61
04-24 99.11
04-25 85.49
04-26 76.28
04-27 96.77
04-28 93.99
04-29 76.16
04-30 62.74
05-01 78.95
05-02 120.02
05-03 98.46
05-04 77.17
05-05 69.48
05-06 81.66
05-07 90.72
05-08 72.62
05-09 61.46
05-10 63.77
05-11 68.86
05-12 62.9
05-13 53.63
05-14 38.54
05-15 39.53
05-16 44.18
05-17 43.96
05-18 57.71
05-19 57.05
05-20 54.44
05-21 52.55
05-22 46.07
05-23 44.02
05-24 42.25
05-25 44.3
05-26 45.45
05-27 41.55
05-28 33.81
05-29 30.33
05-30 29.94
05-31 33.31
06-01 36.35
06-02 33.54
06-03 34.64
06-04 31.36
06-05 28.86
06-06 27.48
06-07 24.11
06-08 42.17
06-09 66.06
06-10 56.72
06-11 47.96
06-12 54.56
06-13 57.23
06-14 62.48
06-15 70.67
06-16 56.16
06-17 44.24
06-18 41.59
06-19 46.94
06-20 43.65
06-21 37.07
06-22 30.83
06-23 27.03
06-24 25.06
06-25 23.44
06-26 22.9
06-27 21.25
06-28 24.99
06-29 26.82
06-30 23.57
07-01 21.64
07-02 18.67
07-03 17.4
07-04 18.83
07-05 19.19
07-06 18.41
07-07 22.43
07-08 22.71
07-09 25.45
07-10 73.62
07-11 61.39
07-12 46.54
07-13 31.63
07-14 25.17
07-15 23.67
07-16 23.4
07-17 28.22
07-18 32.38
07-19 29.97
07-20 23.79
07-21 18.54
07-22 14.18
07-23 15.98
07-24 22.36
07-25 20.26
07-26 17.21
07-27 15.68
07-28 13.83
07-29 12.14
07-30 12.13
07-31 11.15
08-01 10.09
08-02 9.72
08-03 10.1
08-04 9.04
08-05 8.67
08-06 8.77
08-07 7.43
08-08 13.88
08-09 13.25
08-10 14.07
08-11 19.2
08-12 17.16
08-13 16.03
08-14 16.54
08-15 19.18
08-16 20.39
08-17 17.28
08-18 15.22
08-19 20.05
08-20 18.53
08-21 13.9
08-22 13.29
08-23 14.03
08-24 16.22
08-25 15.5
08-26 12.39
08-27 9.95
08-28 13.12
08-29 46.26
08-30 41.86
08-31 28.11
09-01 19.22
09-02 52.48
09-03 57.67
09-04 38.88
09-05 27.76
09-06 26.1
09-07 51.25
09-08 60.21
09-09 67.98
09-10 46.17
09-11 39.25
09-12 40.69
09-13 36.38
09-14 32.85
09-15 26.48
09-16 19.35
09-17 14.25
09-18 11.42
09-19 18.27
09-20 18.63
09-21 16.11
09-22 13.64
09-23 12.99
09-24 14.96
09-25 21.15
09-26 60.01
09-27 74.49
09-28 51.69
09-29 43.99
09-30 60.26
10-01 58.76
10-02 46.61
10-03 39.73
10-04 34.3
10-05 43.12
10-06 38.66
10-07 38.08
10-08 32.51
10-09 29.17
10-10 27.13
10-11 24.67
10-12 25.55
10-13 27.18
10-14 29.53
10-15 31.15
10-16 30.73
10-17 35.11
10-18 34.26
10-19 30.8
10-20 30.4
10-21 36.02
10-22 44.11
10-23 41.26
10-24 34.43
10-25 45.44
10-26 45.2
10-27 52.29
10-28 57.4
10-29 54.51
10-30 76.0
10-31 59.19
11-01 77.13
11-02 71.73
11-03 58.18
11-04 55.15
11-05 48.92
11-06 44.22
11-07 42.65
11-08 42.11
11-09 39.95
11-10 40.88
11-11 43.02
11-12 45.18
11-13 45.12
11-14 51.88
11-15 51.34
11-16 48.21
11-17 51.6
11-18 57.43
11-19 58.72
11-20 54.03
11-21 49.47
11-22 44.78
11-23 52.86
11-24 68.95
11-25 80.48
11-26 74.91
11-27 78.47
11-28 89.62
11-29 76.24
11-30 71.26
12-01 81.27
12-02 92.38
12-03 81.33
12-04 73.36
12-05 65.44
12-06 73.28
12-07 73.11
12-08 98.65
12-09 171.55
12-10 128.64
12-11 161.84
12-12 179.55
12-13 120.93
12-14 104.19
12-15 120.38
12-16 98.14
12-17 83.53
12-18 87.23
12-19 127.38
12-20 111.31
12-21 92.85
12-22 106.53
12-23 97.82
12-24 108.76
12-25 139.2
12-26 149.58
12-27 114.08
12-28 98.61
12-29 119.46
12-30 112.21
12-31 118.67

Annual Peak Streamflow


Seasonal Comparison


Oceanic Nino Index