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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 84 47 94 104 19 8.4 4.1 2 1.3 1.8 3.1 35
2 64 55 116 71 18 8.1 4 2 1.2 1.6 3.3 53
3 60 66 99 61 18 7.8 3.8 2 1.3 1.5 2.9 28
4 156 64 97 52 18 8 3.8 1.9 1.2 1.5 4.3 29
5 106 60 92 55 18 7.7 3.7 1.8 1.2 1.7 3.4 20
6 63 69 97 50 16 7.3 3.6 1.8 1.1 1.4 6.4 18
7 67 122 88 60 16 7.1 3.6 1.7 1.1 1.5 4.3 16
8 78 117 82 44 15 6.9 3.6 1.7 1.1 1.6 5.4 18
9 117 94 68 39 14 7.1 3.9 1.6 1.2 1.5 4.4 30
10 68 85 117 38 13 6.6 3.6 1.7 1.3 1.9 6.8 33
11 77 71 91 60 13 6.4 3.4 1.6 1.2 3 40 65
12 64 107 81 45 12 6.2 3.3 1.6 1.2 2.3 16 36
13 115 122 107 61 12 6 3.2 1.6 1.2 4.4 27 30
14 148 143 84 37 11 5.9 3.1 1.7 1.2 2.7 33 34
15 78 138 84 35 11 5.8 2.9 1.8 1.2 2.7 35 38
16 145 157 88 31 12 5.7 2.8 1.7 1.2 4 35 61
17 111 144 83 28 11 5.6 2.7 1.6 1.2 3.9 21 36
18 113 137 66 26 11 5.5 2.7 1.6 1.2 2.6 17 40
19 93 149 63 25 14 5.3 2.6 2.1 1.3 2.5 14 57
20 109 154 77 24 13 5.3 2.5 1.7 1.2 3 20 70
21 111 104 104 23 12 5.1 2.5 1.7 1.4 2.6 13 72
22 114 84 128 22 12 4.9 2.4 1.6 1.3 2.3 11 89
23 75 72 92 23 11 4.8 2.4 1.5 1.2 2.9 9.7 88
24 84 67 110 23 10 4.7 2.3 1.5 1.4 3.7 21 80
25 79 81 95 23 9.9 4.6 2.3 1.5 1.4 10 14 78
26 80 84 101 21 9.7 4.5 2.3 1.5 1.2 5.2 11 55
27 74 87 81 20 9.7 4.4 2.2 1.4 1.3 3.2 19 86
28 60 76 88 25 10 4.5 2.2 1.4 1.2 3.1 19 62
29 55 41 70 21 9.2 4.7 2.2 1.4 1.2 3.1 25 117
30 46   67 23 8.7 4.3 2.1 1.4 1.5 3.1 28 95
31 51   84   8.7   2.1 1.4   3   132