Warning: Javascript must be enabled to use all the features on this page!


Page Loading - Please Wait...

Click to hideNews Bulletins
  • January 22, 2018 - USGS Water Data availability during lapse in Federal funding

    Due to a lapse in Federal funding, the U.S. Geological Survey must suspend those parts of its data collection and distribution processes requiring human intervention. However, automated reporting and serving of telemetered data will continue.

    Users may note some degradation in the quality and completeness of real-time streamflow, groundwater and water-quality data from some reporting stations due to the suspension of field calibrations and adjustments, especially as high flows occur, aquatic vegetation becomes dominant, or ice forms in high altitude streams. The USGS will continue to monitor some performance aspects of its network using a skeleton workforce.

  • Please see news on new formats
  • Full News RSS icon

USGS Daily Statistics for California

Click to hide state-specific text

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
Output formats
HTML table of all data
Tab-separated data
Reselect output format

00060, Discharge, cubic feet per second,
Day of
month
Mean of daily mean values for each day for 38 - 41 years of record in, ft3/s   (Calculation Period 1969-10-01 -> 2017-09-30)

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 78 42 94 111 20 8.2 4.1 1.9 1.2 1.8 3.4 41
2 66 46 116 73 18 8.0 4.0 1.8 1.1 1.6 3.6 61
3 62 54 100 62 19 7.7 3.8 1.9 1.2 1.5 3.0 32
4 167 42 101 52 17 8.0 3.8 1.8 1.2 1.5 4.7 34
5 100 44 96 50 18 7.8 3.7 1.7 1.1 1.8 3.6 23
6 59 66 93 46 17 7.2 3.6 1.6 1.0 1.5 7.1 20
7 67 129 84 42 16 7.0 3.6 1.6 1.0 1.6 4.7 17
8 78 125 81 39 15 6.9 3.5 1.5 1.0 1.7 5.7 18
9 81 99 64 36 15 7.2 3.8 1.5 1.1 1.6 4.6 33
10 61 85 83 37 14 6.6 3.5 1.5 1.2 2.0 7.5 37
11 78 74 85 63 13 6.4 3.4 1.4 1.2 3.3 47 74
12 66 117 75 46 12 6.2 3.3 1.4 1.1 2.5 18 41
13 121 128 107 64 12 6.1 3.1 1.5 1.1 5.0 31 24
14 122 137 74 38 12 5.9 3.0 1.6 1.1 3.0 38 27
15 71 146 79 36 11 5.8 2.9 1.7 1.2 3.0 41 40
16 130 169 88 30 11 5.7 2.8 1.6 1.1 4.5 40 59
17 101 156 86 28 11 5.6 2.7 1.5 1.1 4.4 24 38
18 120 148 68 26 11 5.5 2.6 1.6 1.2 2.9 19 44
19 100 158 66 25 11 5.4 2.5 2.2 1.2 2.8 16 64
20 119 166 80 25 11 5.4 2.4 1.6 1.2 3.3 23 79
21 121 111 84 23 10 5.2 2.4 1.6 1.3 2.9 15 83
22 104 90 90 22 9.8 5.0 2.4 1.5 1.3 2.5 12 100
23 77 78 83 24 9.5 4.8 2.3 1.4 1.2 3.2 11 93
24 89 70 112 24 9.3 4.8 2.3 1.4 1.4 2.7 24 86
25 84 89 97 24 9.1 4.7 2.3 1.5 1.4 4.2 16 85
26 88 93 104 22 9.0 4.5 2.2 1.4 1.2 5.0 13 58
27 79 85 83 20 9.1 4.4 2.2 1.4 1.4 3.3 20 85
28 62 73 90 27 9.9 4.5 2.2 1.3 1.2 3.3 22 65
29 60 40 66 22 8.8 4.8 2.1 1.3 1.2 3.3 29 132
30 50   59 25 8.5 4.4 2.0 1.3 1.4 3.4 32 93
31 54   85   8.5   2.0 1.3   3.3   77