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USGS Surface-Water Daily Statistics for Hawaii

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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 16854500 Ugum River above Talofofo Falls, nr Talofofo, Guam


Guam, Guam
Hydrologic Unit Code 22010000
Latitude  13°19'20.7", Longitude -144°44'10.1" NAD83
Drainage area 5.92  square miles
Gage datum 130 feet above LMSL
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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 1976-10-01 -> 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 17 17 14 12 8.8 10 12 32 44 57 35 30
2 17 15 13 9 8 8.3 11 38 46 44 44 43
3 16 15 11 8.9 8.2 11 11 36 45 55 48 27
4 22 14 11 8.7 13 8.4 24 39 38 56 46 29
5 16 13 11 8.3 8 12 27 28 37 59 42 27
6 17 14 13 10 7.6 8.2 18 40 51 55 33 27
7 15 14 11 12 7.2 7.5 14 36 58 53 31 27
8 27 14 11 9.2 7.1 9.3 19 30 50 59 36 22
9 20 12 12 8.3 7.1 8.1 18 28 67 52 41 22
10 23 12 11 8 7.2 7.3 18 27 56 72 34 23
11 21 13 10 8.1 9.2 7.4 17 33 38 65 30 20
12 21 13 11 8 7.8 8.1 19 39 40 43 32 26
13 22 15 10 7.9 7.1 7.7 21 50 40 51 42 21
14 24 14 10 7.8 8.1 8 15 36 56 50 33 22
15 21 18 12 10 8.6 8.7 15 60 57 51 34 19
16 20 15 9.6 8.1 13 8.6 19 66 52 51 36 23
17 16 13 9.7 12 14 12 21 53 56 56 37 28
18 19 21 11 11 12 11 20 42 44 63 46 20
19 18 17 13 8.1 11 11 22 44 55 63 46 20
20 15 13 10 10 12 9 20 42 55 62 41 20
21 17 13 9.4 12 9.3 14 23 58 71 50 31 30
22 22 13 9 8.3 9.4 14 17 61 49 49 35 19
23 16 28 9 7.7 11 14 15 57 54 42 50 20
24 15 15 9 9.7 26 11 14 63 54 49 35 23
25 15 13 8.6 9.5 23 9.7 19 51 53 54 33 17
26 16 34 8.7 13 10 11 22 59 43 37 30 18
27 16 13 9 9 8.2 39 27 60 57 54 45 26
28 17 14 8.5 11 8 33 34 52 45 46 42 23
29 17 25 8.5 9.1 7.4 15 29 48 45 48 31 17
30 16   8.8 8.9 11 12 47 43 55 45 27 20
31 14   8.9   10   35 61   41   18