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USGS Daily Statistics for California

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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 11465350 DRY C NR MOUTH NR HEALDSBURG CA


Sonoma County, California
Hydrologic Unit Code 18010110
Latitude  38°35'15", Longitude 122°51'40" NAD27
Drainage area 217  square miles
Gage datum 56.70 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 1981-10-01 -> 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
1 164 428 417 326 119 104 99 89 90 77 102 126
2 148 381 614 304 117 104 98 89 90 78 104 138
3 179 312 584 268 114 101 98 89 89 78 100 150
4 251 442 500 247 115 101 98 90 89 78 100 126
5 281 594 523 247 112 102 99 90 88 78 104 132
6 287 594 631 266 112 100 98 90 88 78 104 154
7 296 722 611 270 113 103 96 90 87 77 108 162
8 544 555 575 241 114 103 97 90 87 77 111 134
9 535 602 643 221 109 103 94 90 88 77 114 130
10 502 530 910 203 106 102 92 91 88 78 112 164
11 432 460 708 181 105 102 93 92 86 78 111 345
12 348 505 612 191 105 102 93 92 85 78 112 215
13 349 667 655 194 106 103 96 93 85 78 112 175
14 467 807 805 183 102 105 97 92 85 80 111 161
15 483 536 589 175 104 104 96 91 85 80 112 265
16 497 392 655 174 108 106 95 91 85 80 110 261
17 516 484 629 173 112 104 95 91 85 80 112 206
18 420 484 593 175 116 102 95 91 85 80 112 190
19 363 584 499 170 125 102 94 92 84 81 132 206
20 366 737 462 156 114 103 94 92 83 82 128 199
21 328 571 458 147 111 102 92 92 84 85 122 188
22 538 470 582 146 113 103 89 91 83 86 116 167
23 332 496 450 143 109 100 89 91 82 84 117 173
24 407 447 453 138 108 99 89 90 81 129 118 170
25 399 389 423 138 107 99 88 91 79 154 117 164
26 400 741 401 137 105 100 88 91 80 107 121 160
27 396 718 424 134 105 98 88 90 80 89 123 196
28 402 444 458 130 106 99 88 90 79 90 119 172
29 366 293 454 127 105 100 89 90 80 93 120 174
30 367   412 123 101 101 89 92 79 102 124 202
31 384   369   102   90 91   101   188