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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 25 35 123 141 27 47 17 7.8 60 58 108
2 46 20 45 102 82 37 64 19 27 44 51 73
3 34 21 39 117 72 38 54 12 13 37 74 74
4 33 27 38 122 62 22 30 12 8.2 26 42 50
5 36 23 39 100 66 24 20 14 9.6 17 44 39
6 31 22 52 105 70 47 13 8.5 19 12 42 48
7 29 19 124 118 55 34 11 7.4 25 20 38 54
8 23 20 66 137 61 24 14 15 20 22 29 50
9 21 19 59 127 65 24 20 11 11 15 27 36
10 51 20 65 143 84 20 68 10 7.2 13 31 68
11 46 21 84 183 48 27 78 13 8.4 17 26 89
12 100 21 75 210 37 33 58 9.6 12 15 35 101
13 92 23 91 187 30 32 21 18 14 17 38 76
14 47 18 70 170 45 25 20 16 17 41 42 81
15 41 16 78 166 59 17 14 13 9.3 64 41 57
16 32 19 74 126 62 16 13 19 7 63 41 49
17 28 27 111 146 75 17 11 8.6 6.6 55 46 43
18 24 32 100 99 52 14 17 16 8.8 28 36 128
19 31 24 97 103 58 28 15 12 18 27 33 58
20 24 22 87 121 57 24 14 8.3 8.3 33 58 37
21 21 32 75 113 47 24 21 9 5.7 49 35 74
22 20 31 60 89 39 14 17 32 8.9 32 29 87
23 21 35 80 124 34 19 22 16 6.9 46 31 120
24 47 40 62 95 30 19 24 9.4 10 47 35 71
25 62 81 69 85 34 20 18 16 10 47 41 132
26 50 69 76 104 60 33 22 12 14 89 47 59
27 32 44 70 110 32 35 12 8.8 16 59 68 56
28 27 39 89 71 46 65 24 108 22 55 75 69
29 23 68 105 62 38 62 24 35 24 59 44 48
30 20   120 69 31 37 31 16 48 202 96 46
31 40   123   31   26 10   106   43