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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 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 41 262 75 31 22 14 23 6.1 21 25 12
2 45 65 229 23 32 28 13 23 5.6 7.9 17 39
3 41 60 130 30 38 36 12 17 5.6 4.8 13 36
4 93 69 155 41 28 36 9.9 15 7.1 10 18 53
5 87 68 166 49 31 47 8.6 12 8.2 27 20 39
6 86 139 131 54 55 38 9 10 7 8.1 34 60
7 129 89 78 43 25 36 9.1 10 6 8 35 68
8 91 112 120 30 34 27 11 9 6.7 7.5 49 19
9 184 137 52 32 40 23 15 6.6 6.2 7.2 39 38
10 219 119 83 20 28 24 14 5.9 22 6.8 34 25
11 137 152 101 49 30 29 18 5.3 20 18 35 47
12 92 161 67 38 43 33 19 7 11 8.7 29 51
13 92 117 98 37 42 32 15 4.1 13 16 14 21
14 100 135 68 60 31 32 15 3.6 13 18 26 28
15 78 122 133 52 30 35 24 8.2 24 12 20 50
16 94 149 101 44 26 46 24 3.1 14 14 27 54
17 87 142 77 47 23 35 26 13 17 36 38 33
18 89 130 68 61 24 37 30 2.9 24 18 22 78
19 57 239 86 34 30 36 27 13 18 17 31 81
20 101 197 98 61 29 34 23 18 20 54 49 61
21 65 182 88 42 23 32 22 15 15 16 54 67
22 99 142 80 23 24 32 22 3.6 30 19 40 73
23 59 224 53 23 18 30 19 3.5 14 26 20 37
24 109 169 39 22 15 29 18 5.3 12 18 60 58
25 186 224 84 26 14 27 17 5.8 20 19 36 59
26 122 151 49 39 13 24 16 5.7 19 28 41 43
27 99 173 47 37 12 23 15 5.8 11 29 24 42
28 71 196 50 38 26 21 15 5.9 12 17 40 77
29 60 65 20 41 13 19 15 6 14 24 52 100
30 49   26 32 16 16 20 7.4 21 41 56 29
31 78   36   22   27 6.1   23   36