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USGS Daily Statistics for the Nation

The statistics generated from this site are based on approved daily-mean data and may not match those published by the USGS in official publications. The user is responsible for assessment and use of statistics from this site. For more details on why the statistics may not match, click here.

USGS 01077400 COCKERMOUTH RIVER BELOW HARDY BROOK, AT GROTON, NH


Grafton County, New Hampshire
Hydrologic Unit Code 01070001
Latitude  43°42'14", Longitude  71°50'00" NAD83
Drainage area 21.4  square miles
Gage datum 608.42 feet above NAVD88
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00060, Discharge, cubic feet per second,
Day of
month
Mean of daily mean values for each day for water year of record in, ft3/s   (Calculation Period 2007-10-01 -> 2025-09-30)

Calculation period restricted by USGS staff due to special conditions at/near site
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1 50 26 37 120 148 27 47 17 7.8 60 58 108
2 46 21 47 103 84 37 64 19 27 44 51 73
3 34 22 41 118 74 38 54 12 13 37 74 74
4 33 28 39 120 63 22 30 12 8.2 26 42 50
5 36 24 41 98 64 24 20 14 9.6 17 44 39
6 31 23 50 102 67 47 13 8.5 19 12 42 48
7 29 20 123 119 51 34 11 7.4 25 20 38 54
8 23 21 66 141 60 24 14 15 20 22 29 50
9 21 20 60 132 57 24 20 11 11 15 27 36
10 51 21 66 149 53 20 68 10 7.2 13 31 68
11 46 22 86 191 43 27 78 13 8.4 17 26 89
12 100 22 75 220 34 33 58 9.6 12 15 35 101
13 92 24 93 195 29 32 21 18 14 17 38 76
14 47 18 71 177 45 25 20 16 17 41 42 81
15 41 17 77 171 59 17 14 13 9.3 64 41 57
16 34 20 66 129 62 16 13 19 7 63 41 49
17 29 28 71 152 75 17 11 8.6 6.6 55 46 43
18 25 34 96 102 52 14 17 16 8.8 28 36 128
19 32 25 96 106 58 28 15 12 18 27 33 58
20 25 23 85 125 57 24 14 8.3 8.3 33 58 37
21 21 34 69 118 47 24 21 9 5.7 49 35 74
22 20 32 57 93 39 14 17 32 8.9 32 29 87
23 22 37 80 130 34 19 22 16 6.9 46 31 120
24 50 42 63 100 30 19 24 9.4 10 47 35 71
25 65 86 71 88 34 20 18 16 10 47 41 132
26 53 72 78 106 60 33 22 12 14 89 47 59
27 34 46 72 113 32 35 12 8.8 16 59 68 56
28 29 41 92 73 46 65 24 108 22 55 75 69
29 23 68 109 63 38 62 24 35 24 59 44 48
30 21   125 71 31 37 31 16 48 202 96 46
31 42   124   31   26 10   106   43