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USGS 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 50051800 RIO GRANDE DE LOIZA AT HWY 183 SAN LORENZO, PR


San Lorenzo Municipio, Puerto Rico
Hydrologic Unit Code 21010005
Latitude  18°11'08.54", Longitude  65°57'41.21" NAD27
Drainage area 41.09  square miles
Gage datum 263.16 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 1989-10-01 -> 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 78 61 48 50 83 77 107 111 100 120 164 118
2 70 66 44 52 88 131 136 101 94 131 125 124
3 70 58 43 48 62 96 109 163 124 162 119 111
4 71 55 44 41 83 125 86 112 118 126 121 111
5 169 100 54 40 84 104 91 95 149 146 166 101
6 122 116 50 37 69 101 110 98 133 130 155 161
7 98 93 90 34 88 104 85 88 168 143 224 107
8 86 71 64 120 93 90 92 99 157 117 287 98
9 77 62 52 42 88 82 119 94 131 127 185 92
10 85 55 43 41 83 82 129 120 391 195 271 88
11 87 54 49 55 121 83 130 93 126 193 258 114
12 71 54 42 51 85 106 90 81 105 164 282 101
13 76 57 39 50 118 86 98 82 147 181 239 91
14 99 56 41 68 117 98 120 161 117 210 225 93
15 85 51 40 54 71 102 104 98 227 199 187 92
16 75 50 43 52 85 97 108 134 178 218 233 94
17 71 52 41 102 161 104 99 115 165 150 190 96
18 78 48 39 86 134 84 108 114 379 165 187 98
19 67 55 40 74 99 143 146 106 283 134 131 93
20 70 80 47 85 151 117 137 123 505 123 124 109
21 66 62 40 77 116 123 137 108 453 158 118 87
22 72 52 48 92 92 112 136 298 412 220 151 92
23 69 51 48 70 139 112 112 303 188 168 173 87
24 64 53 46 81 116 99 94 228 152 135 158 85
25 62 53 44 52 87 75 91 180 130 167 113 113
26 63 50 41 61 109 87 81 129 117 200 106 77
27 57 47 40 68 82 99 91 126 120 211 102 76
28 66 57 44 82 108 70 91 121 123 168 112 83
29 65 59 51 136 81 88 80 143 114 166 107 95
30 55   70 68 117 91 229 114 117 139 114 82
31 54   63   94   147 110   160   91