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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 11466320 SANTA ROSA C A WILLOWSIDE RD NR SANTA ROSA CA


Sonoma County, California
Hydrologic Unit Code 18010110
Latitude  38°26'43", Longitude 122°48'22" NAD27
Drainage area 77.6  square miles
Gage datum 2.36 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 1998-10-01 -> 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
1 308 138 214 114 26 12 5.2 3.1 2.2 2 32 204
2 343 152 251 85 30 11 4.9 3 4.1 6.7 22 212
3 229 155 219 88 67 11 4.8 3 2.5 3.3 15 101
4 315 195 180 107 38 13 4.7 2.9 2.3 5.7 11 45
5 261 163 212 109 47 16 4.6 2.9 2.2 11 8.6 84
6 231 218 292 117 26 12 4.5 2.9 2.1 3.2 9.7 100
7 175 336 181 132 23 10 4.5 2.9 2.1 2.5 41 91
8 298 313 147 88 45 11 4.4 2.8 2.1 2.3 50 121
9 343 424 188 57 45 12 4.4 2.8 2.1 2.3 40 68
10 324 258 302 50 23 9.9 4.3 2.8 2.1 10 19 90
11 249 177 204 103 20 9.2 4 2.7 2.1 3.1 31 220
12 181 138 162 150 18 8.7 4 2.7 2 13 42 140
13 177 284 207 116 17 8.2 3.9 2.7 2.3 19 21 199
14 205 255 285 64 19 7.8 3.9 2.6 2.2 6.9 14 255
15 130 208 221 50 31 7.6 3.8 2.6 2.1 6.9 13 270
16 178 350 198 74 24 8.5 3.7 2.5 2.1 7.1 26 294
17 157 374 132 60 23 7.9 3.7 2.5 3.1 7.3 22 180
18 215 299 104 45 62 7.6 3.6 2.5 2.7 4.3 26 175
19 247 249 152 40 46 7 3.5 2.5 3.1 14 44 219
20 305 278 179 50 25 6.7 3.4 2.5 2.4 8.9 44 243
21 231 210 160 42 20 6.5 3.3 2.5 3.8 4.7 46 261
22 276 255 274 50 18 6.4 3.4 2.5 2.4 16 34 266
23 261 200 149 33 16 6.3 3.3 2.5 2.1 10 27 253
24 163 224 187 39 15 6.1 3.2 2.4 1.9 200 38 191
25 228 267 177 40 19 13 3.2 2.3 2.4 115 20 153
26 210 386 136 29 17 7.7 3.3 2.3 2.1 58 26 184
27 138 477 145 29 25 7.9 3.2 2.2 2.5 21 28 364
28 106 341 190 43 16 10 3.2 2.2 2.1 37 54 318
29 84 182 146 43 13 6.5 3.1 2.2 2 22 105 389
30 95   97 28 12 5.4 3.1 2.2 2 23 123 346
31 135   116   12   3.1 2.2   14   472