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USGS Daily Statistics for California

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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 11101250 RIO HONDO AB WHITTIER NARROWS DAM CA


Los Angeles County, California
Hydrologic Unit Code 18070105
Latitude  34°03'30", Longitude 118°04'15" NAD27
Drainage area 91.2  square miles
Gage datum 219.95 feet above NAVD88
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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 1955-10-01 -> 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 15 40 259 74 30 21 14 23 6.1 21 25 12
2 44 64 226 22 31 28 13 23 5.6 7.9 17 39
3 41 59 129 30 38 36 12 17 5.6 4.8 13 36
4 92 68 153 40 28 36 9.9 15 7.1 10 18 53
5 86 67 165 48 31 47 8.6 12 8.2 27 20 38
6 85 140 131 53 54 38 9 10 7 8.1 34 59
7 127 92 77 43 25 36 9.1 10 6 8 35 67
8 90 110 118 30 34 27 11 9 6.7 7.5 49 19
9 181 135 51 31 39 23 15 6.6 6.2 7.2 39 37
10 216 117 82 20 28 24 14 5.9 22 6.8 34 25
11 135 150 99 48 29 29 18 5.3 20 18 35 46
12 90 159 66 37 43 33 19 7 11 8.7 29 50
13 91 132 103 37 41 32 15 4.1 13 16 14 21
14 99 135 68 59 31 32 15 3.6 13 18 26 27
15 77 121 131 52 30 35 24 8.2 24 12 20 49
16 93 147 100 44 26 46 24 3.1 14 14 27 53
17 86 140 76 47 23 35 26 13 17 36 38 32
18 88 128 67 60 24 37 30 2.9 24 18 22 77
19 56 236 85 34 30 36 27 13 18 17 31 79
20 99 195 97 60 29 34 23 18 20 54 49 60
21 64 179 87 42 23 32 22 15 15 16 54 66
22 97 140 79 22 24 32 22 3.6 30 19 40 72
23 58 221 52 23 18 30 19 3.5 14 26 20 36
24 107 167 38 22 15 29 18 5.3 12 18 60 57
25 183 221 83 26 13 27 17 5.8 20 19 36 58
26 121 149 49 39 13 24 16 5.7 19 28 41 42
27 99 170 46 37 12 23 15 5.8 11 29 24 41
28 70 193 49 38 25 21 15 5.9 12 17 40 76
29 59 65 20 41 13 19 15 6 14 24 52 99
30 48   26 32 16 16 20 7.4 21 41 56 29
31 77   36   21   27 6.1   23   36