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St Marys River At Great Mills, Md 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 27.59
01-02 42.19
01-03 29.42
01-04 32.7
01-05 29.95
01-06 23.18
01-07 39.57
01-08 28.36
01-09 24.84
01-10 95.2
01-11 47.33
01-12 42.89
01-13 47.34
01-14 30.54
01-15 27.18
01-16 45.08
01-17 31.44
01-18 47.83
01-19 45.32
01-20 31.13
01-21 27.9
01-22 22.99
01-23 21.03
01-24 22.41
01-25 29.67
01-26 30.51
01-27 23.8
01-28 30.46
01-29 47.48
01-30 32.68
01-31 25.07
02-01 35.16
02-02 33.25
02-03 28.98
02-04 43.9
02-05 35.63
02-06 32.57
02-07 49.02
02-08 36.05
02-09 29.35
02-10 26.01
02-11 27.88
02-12 39.68
02-13 58.19
02-14 65.07
02-15 43.47
02-16 66.78
02-17 51.88
02-18 44.28
02-19 34.0
02-20 29.65
02-21 57.99
02-22 34.3
02-23 46.17
02-24 43.71
02-25 100.32
02-26 47.35
02-27 36.82
02-28 31.25
02-29 35.1
03-01 51.13
03-02 43.47
03-03 42.33
03-04 46.68
03-05 34.04
03-06 48.03
03-07 80.87
03-08 44.89
03-09 35.31
03-10 36.74
03-11 29.14
03-12 24.14
03-13 32.58
03-14 24.29
03-15 24.57
03-16 20.48
03-17 20.09
03-18 34.17
03-19 37.87
03-20 27.08
03-21 36.34
03-22 35.21
03-23 28.05
03-24 42.12
03-25 61.76
03-26 38.19
03-27 26.93
03-28 32.85
03-29 30.76
03-30 28.7
03-31 24.13
04-01 29.99
04-02 27.72
04-03 22.77
04-04 25.29
04-05 21.21
04-06 22.29
04-07 59.91
04-08 43.19
04-09 28.18
04-10 21.51
04-11 18.52
04-12 47.2
04-13 26.57
04-14 20.62
04-15 29.58
04-16 24.72
04-17 23.55
04-18 17.78
04-19 24.54
04-20 27.11
04-21 37.1
04-22 30.04
04-23 54.36
04-24 20.94
04-25 24.01
04-26 27.64
04-27 20.85
04-28 24.23
04-29 26.0
04-30 38.61
05-01 87.03
05-02 40.02
05-03 31.89
05-04 31.95
05-05 24.42
05-06 25.36
05-07 29.97
05-08 25.59
05-09 22.56
05-10 19.19
05-11 15.82
05-12 25.13
05-13 32.11
05-14 27.02
05-15 32.81
05-16 36.74
05-17 24.43
05-18 22.3
05-19 70.07
05-20 62.24
05-21 27.08
05-22 31.52
05-23 36.0
05-24 24.9
05-25 30.0
05-26 20.67
05-27 14.31
05-28 17.9
05-29 19.99
05-30 14.9
05-31 41.26
06-01 15.54
06-02 33.13
06-03 16.53
06-04 24.48
06-05 21.58
06-06 14.3
06-07 10.94
06-08 26.12
06-09 11.69
06-10 56.56
06-11 43.8
06-12 43.01
06-13 16.02
06-14 18.5
06-15 13.88
06-16 11.09
06-17 19.02
06-18 15.75
06-19 42.03
06-20 19.77
06-21 20.32
06-22 14.81
06-23 18.47
06-24 23.6
06-25 11.78
06-26 11.44
06-27 9.83
06-28 22.16
06-29 28.2
06-30 11.55
07-01 10.86
07-02 23.85
07-03 17.56
07-04 12.31
07-05 19.55
07-06 9.45
07-07 40.76
07-08 26.01
07-09 69.12
07-10 30.36
07-11 12.21
07-12 18.98
07-13 21.77
07-14 15.41
07-15 56.79
07-16 31.56
07-17 15.89
07-18 11.19
07-19 23.9
07-20 18.82
07-21 9.68
07-22 50.11
07-23 19.38
07-24 12.57
07-25 15.13
07-26 60.19
07-27 47.24
07-28 16.29
07-29 28.92
07-30 17.48
07-31 12.36
08-01 13.21
08-02 18.21
08-03 9.05
08-04 14.1
08-05 43.56
08-06 27.87
08-07 31.4
08-08 26.0
08-09 18.77
08-10 20.58
08-11 14.2
08-12 10.39
08-13 9.68
08-14 12.8
08-15 16.02
08-16 12.15
08-17 22.51
08-18 17.71
08-19 26.18
08-20 13.8
08-21 14.1
08-22 17.66
08-23 18.63
08-24 16.59
08-25 9.37
08-26 17.55
08-27 16.23
08-28 504.41
08-29 87.18
08-30 33.2
08-31 22.86
09-01 12.44
09-02 9.3
09-03 18.6
09-04 7.49
09-05 12.06
09-06 8.05
09-07 16.95
09-08 12.88
09-09 15.03
09-10 59.51
09-11 60.25
09-12 29.51
09-13 14.09
09-14 12.12
09-15 9.2
09-16 7.25
09-17 10.01
09-18 12.1
09-19 13.13
09-20 13.93
09-21 8.05
09-22 7.8
09-23 7.75
09-24 22.48
09-25 11.19
09-26 8.77
09-27 9.67
09-28 9.3
09-29 30.17
09-30 32.45
10-01 28.13
10-02 32.34
10-03 26.93
10-04 17.52
10-05 11.46
10-06 9.1
10-07 7.1
10-08 7.24
10-09 16.63
10-10 25.48
10-11 17.15
10-12 66.01
10-13 30.54
10-14 18.73
10-15 14.92
10-16 15.42
10-17 18.41
10-18 13.23
10-19 10.12
10-20 9.32
10-21 13.42
10-22 10.37
10-23 10.62
10-24 9.49
10-25 14.15
10-26 13.79
10-27 34.64
10-28 25.29
10-29 23.51
10-30 145.12
10-31 47.02
11-01 32.68
11-02 22.91
11-03 17.55
11-04 13.38
11-05 11.55
11-06 24.22
11-07 19.1
11-08 18.56
11-09 12.88
11-10 24.55
11-11 17.75
11-12 287.78
11-13 46.59
11-14 29.68
11-15 25.11
11-16 50.28
11-17 35.56
11-18 31.88
11-19 20.4
11-20 15.75
11-21 13.56
11-22 29.41
11-23 14.59
11-24 13.56
11-25 58.0
11-26 20.62
11-27 24.78
11-28 27.09
11-29 17.11
11-30 15.27
12-01 20.89
12-02 17.85
12-03 16.67
12-04 14.67
12-05 21.6
12-06 35.56
12-07 32.73
12-08 39.25
12-09 24.74
12-10 28.03
12-11 83.6
12-12 32.87
12-13 22.12
12-14 21.79
12-15 35.18
12-16 89.89
12-17 71.58
12-18 113.15
12-19 53.15
12-20 34.26
12-21 43.36
12-22 27.6
12-23 39.18
12-24 45.97
12-25 69.22
12-26 35.38
12-27 43.34
12-28 40.52
12-29 41.94
12-30 40.19
12-31 28.09

Annual Peak Streamflow


Seasonal Comparison


Oceanic Nino Index