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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 50011200 RIO GUAJATACA BLW LAGO GUAJATACA, PR


Quebradillas Municipio, Puerto Rico
Hydrologic Unit Code 21010002
Latitude  18°24'01.00", Longitude  66°55'40.00" NAD27
Gage datum 535 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 1968-10-01 -> 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 11 8.8 4 4.2 68 101 56 35 45 56 67 18
2 12 9 14 6 65 105 33 37 34 72 67 17
3 12 8.6 18 7.5 60 105 18 30 31 69 69 20
4 13 8.6 18 7.5 64 96 15 21 33 67 70 26
5 14 8.8 19 8.2 67 83 18 14 34 62 58 25
6 15 8.4 13 9.5 69 102 15 6.4 37 67 50 26
7 13 8.5 4 15 64 99 8.6 6.4 44 108 49 26
8 9.6 8.5 3.9 21 57 81 6.5 8.8 47 119 90 18
9 8.8 6.2 5.3 21 61 76 6.4 11 50 126 120 17
10 8.8 11 7 16 74 83 6.5 11 44 139 118 19
11 8.8 15 6.7 10 92 96 6.4 11 39 145 113 27
12 8.9 9.3 7.8 20 74 110 6.5 12 49 145 102 30
13 9.4 6.1 7.5 25 69 113 8.8 13 57 139 96 30
14 11 6.1 6.2 41 95 90 18 27 40 123 80 34
15 10 6.1 6.2 55 85 68 18 37 35 121 73 37
16 10 6.4 6.3 63 68 53 14 47 41 102 68 39
17 7.7 6.2 6.4 67 58 46 16 74 48 82 53 32
18 7.4 6.7 6.3 59 57 49 9.9 73 54 62 52 16
19 7 7.1 6.4 59 62 58 9.9 51 72 52 49 12
20 7.1 7 6.5 63 55 68 6.5 38 80 45 36 14
21 7.1 7 4.7 61 47 58 12 38 72 42 37 15
22 7 7.1 3.7 55 40 37 19 35 67 66 36 15
23 6.8 7 3.8 53 30 26 28 34 97 69 40 14
24 6.8 7 4 52 29 18 29 43 105 57 58 15
25 6.9 7.1 4.1 53 46 18 26 53 96 60 58 15
26 7.2 7 3.9 58 56 16 31 52 83 62 46 15
27 9 6.9 3.9 62 76 35 38 61 66 68 41 15
28 9.3 6.7 5.9 62 99 55 34 67 56 70 27 14
29 9.3 4 13 61 104 67 33 69 61 63 21 9.4
30 9.1   16 69 108 68 34 75 63 67 18 7.9
31 9   10   105   33 68   73   9.7