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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 11047300 ARROYO TRABUCO A SAN JUAN CAPISTRANO CA


Orange County, California
Hydrologic Unit Code 18070301
Latitude  33°29'54", Longitude 117°39'54" NAD27
Drainage area 54.1  square miles
Gage datum 65.28 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 1972-10-01 -> 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 19 21 40 21 5.5 3.8 2.1 1.4 1.2 2.6 4 12
2 18 27 39 15 5.1 4.2 2 1.3 1.3 2.3 2.8 6.9
3 27 37 29 12 7.6 3.8 1.9 1.2 1.9 1.9 2.1 10
4 22 28 23 21 8.2 3.6 2 1.5 1.9 2.5 4.7 20
5 52 49 30 20 12 3.7 1.9 1.3 1.4 8.1 2.8 9
6 24 65 32 35 15 3.9 1.9 1.4 1.6 4.2 2.9 68
7 28 41 27 24 9.4 3.7 1.9 1.3 1.3 2.2 3.2 29
8 21 53 36 16 8.3 3.8 1.9 1.3 1.3 2 26 12
9 71 43 21 21 6.8 3.6 1.8 1.2 1.4 3.7 13 9.3
10 71 22 37 27 6 3.7 1.7 1.2 3.2 3.8 5.9 9.9
11 87 65 31 18 5.6 3.6 1.6 1.2 3 3.8 9.3 25
12 38 93 28 19 8.7 3.5 1.6 1.2 1.6 4.1 8.3 28
13 24 68 22 16 10 3.1 4.3 1.2 1.5 3.9 11 17
14 26 128 25 22 6.6 2.9 1.7 1.3 1.4 3.3 7.6 18
15 30 60 55 15 7.2 2.8 1.7 1.2 8.8 2.1 4 23
16 45 56 51 9.5 6.9 2.8 1.9 1.8 1.8 2.7 7.7 36
17 39 65 31 17 5.7 2.7 2.2 4.8 1.7 11 4.3 22
18 28 56 21 15 6.1 2.7 2.6 2 1.6 8.5 6.9 19
19 29 71 18 10 5.5 2.6 2.4 1.6 2.6 14 2.8 41
20 37 58 22 14 5.3 2.5 2.6 10 1.7 28 11 53
21 36 92 43 12 4.5 2.5 1.7 8.4 1.5 3.8 29 50
22 60 88 27 9.4 9.8 2.4 1.6 2.3 2 4.1 17 113
23 34 117 29 7.1 7.1 2.4 1.6 1.8 1.7 4.9 4.7 35
24 17 77 19 9.6 5.8 2.4 1.6 1.7 2.5 2.9 19 37
25 22 88 42 6.8 4.8 2.2 1.4 1.6 6.9 4 10 28
26 34 78 19 9.6 4.8 2.2 1.8 1.4 2.6 3.6 19 36
27 26 49 14 7.5 5 2.2 1.5 1.3 1.7 41 16 25
28 18 55 28 14 4.3 2.1 1.3 1.3 1.6 6.5 21 32
29 20 14 23 6.3 4.3 2.1 1.4 1.3 1.7 5.5 24 30
30 12   24 5.7 4.3 2.2 1.8 1.3 1.6 11 20 17
31 22   21   3.9   1.5 1.2   4.4   24