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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
1 306 163 208 117 26 12 5.2 3.1 2.2 2 31 199
2 338 226 243 87 29 11 4.9 3 4.1 6.7 22 206
3 232 213 212 89 65 11 4.8 3 2.5 3.2 14 99
4 311 314 175 106 37 13 4.7 2.9 2.3 5.5 11 45
5 258 223 206 107 46 16 4.6 2.9 2.2 10 8.3 83
6 227 262 283 115 26 12 4.5 2.9 2.1 3.1 9.4 98
7 172 365 176 129 23 10 4.5 2.9 2.1 2.4 39 89
8 290 320 143 86 44 11 4.4 2.8 2.1 2.3 48 118
9 333 420 183 56 44 12 4.4 2.8 2.1 2.2 38 66
10 314 258 292 50 22 9.8 4.3 2.8 2.1 9.6 18 88
11 242 178 198 101 20 9.2 4 2.7 2.1 3 32 213
12 177 138 161 146 18 8.6 4 2.7 2 12 41 148
13 172 350 203 113 17 8.1 3.9 2.7 2.3 18 20 209
14 199 289 285 63 19 7.8 3.9 2.6 2.2 6.7 15 341
15 127 219 218 50 30 7.5 3.8 2.6 2.1 6.7 13 286
16 173 349 197 72 23 8.4 3.7 2.5 2.1 6.9 25 324
17 153 369 149 59 23 7.8 3.7 2.5 3.1 7 21 194
18 209 296 108 44 60 7.5 3.6 2.5 2.7 4.2 25 180
19 240 246 151 40 45 6.9 3.5 2.5 3.1 14 42 219
20 295 272 177 49 24 6.6 3.4 2.5 2.4 8.6 117 240
21 224 207 157 42 19 6.5 3.3 2.5 3.8 4.6 201 261
22 268 250 267 49 17 6.3 3.4 2.5 2.4 15 175 266
23 252 196 146 32 16 6.3 3.3 2.5 2.1 9.7 105 260
24 158 219 183 38 15 6.1 3.2 2.4 1.9 193 75 222
25 221 260 172 39 18 13 3.2 2.3 2.4 110 35 163
26 204 374 133 29 17 7.7 3.3 2.3 2.1 56 40 193
27 134 461 143 29 25 7.9 3.2 2.2 2.5 20 34 396
28 104 330 185 42 15 10 3.2 2.2 2.1 35 57 329
29 82 182 143 43 13 6.5 3.1 2.2 2 21 105 417
30 93   97 28 12 5.4 3.1 2.2 2 22 121 355
31 132   119   12   3.1 2.2   14   468