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USGS Surface-Water 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 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 water year of record in, ft3/s   (Calculation Period 1969-10-01 -> 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 85 39 92 102 19 8.4 4.1 2 1.3 1.8 3.1 36
2 65 47 112 70 18 8.1 4 2 1.2 1.6 3.3 54
3 60 62 96 60 18 7.8 3.8 2 1.3 1.5 2.9 29
4 159 52 95 50 17 8 3.8 1.9 1.2 1.5 4.3 30
5 108 50 91 53 17 7.7 3.7 1.8 1.2 1.7 3.4 20
6 64 65 94 49 16 7.3 3.6 1.8 1.1 1.4 6.4 18
7 68 118 86 59 15 7.1 3.6 1.7 1.1 1.5 4.3 17
8 79 114 81 43 14 6.9 3.6 1.7 1.1 1.6 5.4 19
9 119 93 67 38 14 7.1 3.9 1.6 1.2 1.5 4.4 30
10 69 84 117 37 13 6.6 3.6 1.7 1.3 1.9 6.8 33
11 77 71 90 60 12 6.4 3.4 1.6 1.2 3 40 66
12 65 107 80 45 12 6.2 3.3 1.6 1.2 2.3 16 37
13 117 123 107 60 12 6 3.2 1.6 1.2 4.4 27 31
14 138 144 84 36 11 5.9 3.1 1.7 1.2 2.7 33 35
15 77 139 84 34 11 5.8 2.9 1.8 1.2 2.7 35 39
16 147 159 88 30 12 5.7 2.8 1.7 1.2 4 35 62
17 110 145 84 27 11 5.6 2.7 1.6 1.2 3.9 22 36
18 114 135 66 26 11 5.5 2.7 1.6 1.2 2.6 17 41
19 94 142 64 24 14 5.3 2.6 2.1 1.3 2.5 14 58
20 109 148 78 24 13 5.3 2.5 1.7 1.2 3 20 70
21 111 100 105 22 12 5.1 2.5 1.7 1.4 2.6 14 73
22 95 81 129 21 12 4.9 2.4 1.6 1.3 2.3 11 91
23 71 70 92 23 11 4.8 2.4 1.5 1.2 2.9 9.9 90
24 81 66 110 23 10 4.7 2.3 1.5 1.4 3.7 21 82
25 77 81 95 23 9.9 4.6 2.3 1.5 1.4 10 14 79
26 80 84 102 21 9.7 4.5 2.3 1.5 1.2 5.2 11 56
27 73 88 81 20 9.7 4.4 2.2 1.4 1.3 3.2 19 88
28 60 77 87 25 10 4.5 2.2 1.4 1.2 3.1 19 64
29 55 37 68 21 9.2 4.7 2.2 1.4 1.2 3.1 26 120
30 46   61 23 8.7 4.3 2.1 1.4 1.5 3.1 28 95
31 49   81   8.7   2.1 1.4   3   134