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USGS Surface-Water Daily Statistics for Puerto Rico

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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 66 53
2 36 28 41 27 62 49 42 53 52 68 59 63
3 40 30 33 48 48 53 31 80 64 54 72 73
4 33 40 29 36 48 52 33 46 49 53 98 59
5 56 80 33 48 34 43 39 54 70 47 85 64
6 57 47 31 34 39 32 35 42 108 55 51 45
7 51 32 35 33 47 35 77 39 69 59 95 44
8 38 29 26 37 87 35 40 38 46 87 115 50
9 43 30 30 28 89 59 49 48 82 56 98 50
10 59 27 30 33 79 70 40 52 181 82 70 84
11 47 33 34 36 56 35 67 42 105 66 55 77
12 39 29 41 45 61 39 50 59 73 55 69 50
13 43 28 38 36 51 32 64 40 49 63 121 40
14 60 36 32 42 60 36 60 52 66 83 65 59
15 88 28 28 65 62 42 42 57 86 74 104 58
16 44 33 26 48 39 34 75 65 86 85 74 64
17 39 29 24 58 37 33 40 75 67 68 75 43
18 40 44 26 52 42 34 44 58 135 57 112 43
19 40 37 32 45 33 59 36 44 86 53 65 37
20 49 41 38 54 73 38 69 142 182 72 61 42
21 40 39 30 58 75 40 67 107 127 71 85 39
22 42 31 31 56 39 32 69 110 139 94 82 49
23 50 39 46 71 104 35 54 189 97 61 57 42
24 39 31 46 55 49 53 48 102 93 57 59 42
25 43 47 34 50 62 33 54 70 66 69 52 40
26 30 33 34 53 62 28 37 45 82 62 49 52
27 31 45 28 52 82 43 58 69 59 91 48 43
28 37 35 42 51 44 35 58 49 57 93 56 54
29 36 28 73 77 52 37 54 75 62 58 48 59
30 29   43 77 46 29 69 84 64 51 66 44
31 36   28   70   49 69   56   46