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Difficult Run Near Great Falls, Va 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 67.09
01-02 133.96
01-03 44.47
01-04 59.12
01-05 60.89
01-06 42.37
01-07 76.57
01-08 45.18
01-09 39.67
01-10 283.97
01-11 80.91
01-12 81.77
01-13 121.33
01-14 55.95
01-15 51.82
01-16 46.8
01-17 88.81
01-18 52.97
01-19 48.19
01-20 146.94
01-21 53.57
01-22 41.33
01-23 38.72
01-24 50.01
01-25 92.29
01-26 80.19
01-27 49.89
01-28 63.92
01-29 69.15
01-30 46.04
01-31 399.16
02-01 75.65
02-02 89.0
02-03 55.11
02-04 111.14
02-05 107.7
02-06 60.22
02-07 63.26
02-08 64.47
02-09 46.01
02-10 45.96
02-11 69.37
02-12 72.05
02-13 106.07
02-14 77.77
02-15 57.43
02-16 182.05
02-17 102.09
02-18 68.96
02-19 57.78
02-20 91.98
02-21 72.89
02-22 78.25
02-23 78.49
02-24 72.64
02-25 166.76
02-26 57.1
02-27 83.79
02-28 51.54
02-29 52.7
03-01 96.39
03-02 111.15
03-03 70.39
03-04 117.04
03-05 68.03
03-06 70.81
03-07 81.61
03-08 61.47
03-09 69.85
03-10 113.88
03-11 97.91
03-12 59.12
03-13 73.31
03-14 51.02
03-15 57.19
03-16 45.06
03-17 115.51
03-18 48.96
03-19 56.6
03-20 57.53
03-21 61.85
03-22 181.66
03-23 56.71
03-24 56.8
03-25 93.49
03-26 63.06
03-27 47.15
03-28 55.75
03-29 67.64
03-30 94.78
03-31 143.21
04-01 107.73
04-02 56.67
04-03 55.13
04-04 58.11
04-05 44.17
04-06 73.03
04-07 67.61
04-08 91.02
04-09 46.97
04-10 46.67
04-11 40.46
04-12 62.7
04-13 49.06
04-14 57.3
04-15 70.33
04-16 106.27
04-17 55.42
04-18 43.55
04-19 53.6
04-20 96.87
04-21 67.34
04-22 40.7
04-23 77.26
04-24 55.36
04-25 45.44
04-26 57.94
04-27 48.27
04-28 45.48
04-29 67.22
04-30 69.08
05-01 324.48
05-02 64.1
05-03 173.36
05-04 107.22
05-05 90.31
05-06 100.72
05-07 195.03
05-08 83.71
05-09 50.0
05-10 45.75
05-11 64.36
05-12 85.15
05-13 55.52
05-14 173.56
05-15 174.62
05-16 127.82
05-17 98.2
05-18 66.41
05-19 77.41
05-20 58.08
05-21 52.3
05-22 56.95
05-23 147.87
05-24 117.13
05-25 58.43
05-26 44.52
05-27 79.66
05-28 81.77
05-29 119.03
05-30 91.53
05-31 51.26
06-01 140.69
06-02 127.37
06-03 69.64
06-04 127.56
06-05 85.33
06-06 58.59
06-07 31.84
06-08 51.78
06-09 114.73
06-10 36.22
06-11 160.64
06-12 151.1
06-13 63.19
06-14 185.46
06-15 131.79
06-16 61.92
06-17 96.68
06-18 45.87
06-19 73.81
06-20 91.02
06-21 142.23
06-22 39.76
06-23 124.73
06-24 76.4
06-25 31.78
06-26 32.72
06-27 22.29
06-28 75.77
06-29 69.75
06-30 26.71
07-01 27.15
07-02 135.83
07-03 47.02
07-04 94.44
07-05 49.97
07-06 33.62
07-07 49.84
07-08 29.28
07-09 381.74
07-10 72.37
07-11 112.78
07-12 43.11
07-13 196.36
07-14 134.63
07-15 84.69
07-16 117.29
07-17 44.98
07-18 43.45
07-19 33.69
07-20 38.06
07-21 25.52
07-22 469.53
07-23 105.24
07-24 115.03
07-25 49.89
07-26 84.42
07-27 23.94
07-28 37.44
07-29 197.7
07-30 38.98
07-31 98.26
08-01 45.76
08-02 91.56
08-03 31.23
08-04 44.45
08-05 53.04
08-06 45.44
08-07 114.36
08-08 176.03
08-09 31.79
08-10 21.51
08-11 133.7
08-12 25.99
08-13 151.88
08-14 76.26
08-15 27.56
08-16 53.22
08-17 42.2
08-18 36.63
08-19 79.9
08-20 126.21
08-21 65.25
08-22 178.05
08-23 41.91
08-24 40.04
08-25 20.7
08-26 33.24
08-27 24.58
08-28 53.1
08-29 70.67
08-30 27.67
08-31 18.51
09-01 47.4
09-02 95.96
09-03 34.72
09-04 23.42
09-05 17.75
09-06 21.84
09-07 83.13
09-08 94.33
09-09 649.25
09-10 166.69
09-11 34.9
09-12 27.67
09-13 87.99
09-14 21.86
09-15 17.88
09-16 16.81
09-17 49.62
09-18 28.83
09-19 32.06
09-20 19.82
09-21 17.28
09-22 18.44
09-23 19.45
09-24 71.91
09-25 41.54
09-26 30.47
09-27 21.97
09-28 90.59
09-29 35.23
09-30 136.46
10-01 25.37
10-02 33.36
10-03 64.59
10-04 30.51
10-05 21.09
10-06 19.29
10-07 17.63
10-08 27.65
10-09 19.94
10-10 24.17
10-11 38.03
10-12 284.44
10-13 40.16
10-14 172.19
10-15 41.93
10-16 43.28
10-17 34.63
10-18 21.4
10-19 18.62
10-20 29.03
10-21 40.12
10-22 23.72
10-23 31.93
10-24 20.24
10-25 19.99
10-26 154.78
10-27 43.88
10-28 34.94
10-29 53.36
10-30 305.69
10-31 62.72
11-01 151.46
11-02 36.53
11-03 122.51
11-04 28.55
11-05 28.11
11-06 40.21
11-07 40.73
11-08 62.92
11-09 29.63
11-10 45.13
11-11 32.54
11-12 121.62
11-13 62.95
11-14 39.7
11-15 29.93
11-16 190.02
11-17 45.59
11-18 41.52
11-19 30.91
11-20 28.71
11-21 25.44
11-22 133.09
11-23 48.23
11-24 36.89
11-25 166.11
11-26 32.82
11-27 101.04
11-28 43.16
11-29 31.13
11-30 39.23
12-01 61.75
12-02 46.54
12-03 50.42
12-04 36.51
12-05 33.65
12-06 34.62
12-07 101.42
12-08 162.91
12-09 41.63
12-10 70.06
12-11 108.96
12-12 40.66
12-13 32.66
12-14 32.95
12-15 60.4
12-16 302.5
12-17 172.48
12-18 261.75
12-19 49.31
12-20 39.12
12-21 51.64
12-22 63.71
12-23 216.44
12-24 85.88
12-25 198.19
12-26 82.21
12-27 152.82
12-28 100.01
12-29 65.07
12-30 89.1
12-31 50.77

Annual Peak Streamflow


Seasonal Comparison


Oceanic Nino Index