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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 11162570 SAN GREGORIO C A SAN GREGORIO CA


San Mateo County, California
Hydrologic Unit Code 18050006
Latitude  37°19'33", Longitude 122°23'08" NAD27
Drainage area 50.9  square miles
Gage datum 11.40 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 39 - 41 years of record in, ft3/s   (Calculation Period 1969-10-01 -> 2018-09-30)

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 76 41 92 111 20 8.2 4.1 2.0 1.3 1.9 3.4 40
2 65 45 114 73 18 8.0 4.0 1.9 1.2 1.7 3.6 60
3 61 53 98 62 19 7.7 3.8 1.9 1.3 1.6 3.0 32
4 163 41 99 52 17 8.0 3.8 1.9 1.2 1.5 4.7 33
5 97 43 94 50 18 7.8 3.7 1.8 1.2 1.8 3.6 22
6 58 65 91 46 17 7.2 3.6 1.7 1.1 1.5 7.0 20
7 65 126 82 42 16 7.0 3.6 1.7 1.1 1.6 4.6 17
8 78 122 79 39 15 6.9 3.5 1.6 1.1 1.7 5.6 18
9 87 97 62 36 15 7.2 3.8 1.6 1.2 1.6 4.6 33
10 61 83 81 37 14 6.6 3.5 1.6 1.3 2.0 7.5 36
11 77 72 83 63 13 6.4 3.4 1.5 1.2 3.3 45 73
12 65 114 73 46 12 6.2 3.3 1.5 1.1 2.5 18 40
13 119 125 105 64 12 6.1 3.2 1.5 1.2 5.0 31 23
14 120 134 73 38 12 5.9 3.1 1.7 1.2 3.0 37 26
15 70 142 77 36 11 5.8 3.0 1.8 1.2 3.0 40 39
16 127 165 87 30 11 5.7 2.9 1.7 1.2 4.5 40 58
17 99 152 86 28 11 5.6 2.8 1.6 1.2 4.3 24 37
18 117 145 68 26 11 5.5 2.7 1.6 1.2 2.9 19 43
19 98 154 65 25 11 5.4 2.6 2.2 1.3 2.8 16 63
20 117 162 79 25 11 5.4 2.5 1.7 1.3 3.3 22 77
21 118 108 83 23 10 5.2 2.5 1.7 1.4 2.9 15 81
22 102 88 103 22 9.8 5.0 2.4 1.6 1.3 2.5 12 98
23 75 76 86 24 9.5 4.8 2.4 1.5 1.3 3.2 11 91
24 87 69 112 24 9.3 4.8 2.4 1.5 1.4 2.7 23 84
25 84 87 96 24 9.1 4.7 2.3 1.5 1.4 4.1 16 83
26 87 91 103 22 9.0 4.5 2.3 1.5 1.3 4.9 13 57
27 78 83 82 20 9.1 4.4 2.2 1.4 1.4 3.2 21 83
28 61 71 90 27 9.9 4.5 2.2 1.3 1.3 3.2 22 64
29 58 40 66 22 8.8 4.8 2.2 1.4 1.2 3.3 28 129
30 49   59 25 8.5 4.4 2.1 1.4 1.5 3.3 31 91
31 53   85   8.5   2.1 1.3   3.3   75