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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 50049100 RIO PIEDRAS AT HATO REY, PR


San Juan Municipio, Puerto Rico
Hydrologic Unit Code 21010005
Latitude  18°24'34.38", Longitude  66°04'09.60" NAD27
Drainage area 15.2  square miles
Gage datum 16.4 feet above NGVD29
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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 1971-10-01 -> 2024-09-30)

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 40 37 48 30 65 48 26 34 63 47 65 52
2 35 29 40 27 62 49 42 53 52 68 58 62
3 39 30 33 47 48 53 31 80 64 54 71 72
4 33 40 29 36 48 52 33 46 49 53 96 58
5 55 79 33 47 34 43 39 54 70 47 83 63
6 56 53 31 34 39 32 35 42 108 55 50 45
7 50 33 35 37 47 35 77 39 69 59 94 43
8 37 30 25 40 87 35 40 38 46 87 113 49
9 42 30 29 30 89 59 49 48 82 56 97 49
10 58 27 29 33 79 70 40 52 181 82 70 85
11 46 33 33 36 56 35 67 42 105 66 54 75
12 39 29 40 45 61 39 50 59 73 55 68 49
13 42 27 37 36 51 32 64 40 49 63 118 40
14 59 35 31 42 60 36 60 52 66 83 64 58
15 86 28 29 65 62 42 42 57 86 74 102 59
16 43 33 26 48 39 34 75 65 86 85 73 65
17 38 29 24 58 37 33 40 75 67 68 73 44
18 40 43 26 52 42 34 44 58 135 57 109 42
19 39 37 32 45 33 59 36 44 86 53 64 36
20 48 40 37 54 73 38 69 142 182 72 60 41
21 40 39 30 58 75 40 67 107 127 71 85 39
22 42 31 31 56 39 32 69 110 139 94 81 53
23 49 38 45 71 104 35 54 189 97 61 57 43
24 39 31 45 55 49 53 48 102 93 57 58 42
25 43 47 44 50 62 33 54 70 66 69 52 40
26 30 34 34 53 62 28 37 45 82 62 48 51
27 31 44 28 52 82 43 58 69 59 91 47 43
28 36 35 41 51 44 35 58 49 57 93 55 53
29 36 27 71 77 52 37 54 75 62 58 47 58
30 30   43 77 46 29 69 84 64 51 65 43
31 37   29   70   49 69   55   46