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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 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
1 256 445 418 334 120 104 99 89 90 77 102 129
2 234 439 604 310 118 104 98 89 90 78 104 141
3 261 405 575 277 115 101 98 89 89 78 101 152
4 298 817 495 259 116 101 98 90 89 78 100 128
5 320 889 516 258 113 102 99 90 88 78 104 134
6 314 748 616 276 113 100 98 90 88 78 105 155
7 308 870 599 280 114 103 96 90 87 77 108 163
8 545 752 569 251 115 103 97 90 87 77 111 136
9 534 775 634 232 110 103 94 90 88 77 114 131
10 500 703 885 212 107 102 92 91 88 78 112 164
11 430 597 693 186 105 102 93 92 86 78 111 339
12 348 579 603 196 106 102 93 92 85 78 112 218
13 352 758 644 199 107 103 96 93 85 78 112 192
14 465 951 793 188 104 105 97 92 85 80 111 356
15 481 616 587 180 104 104 96 91 85 80 112 384
16 493 438 666 178 108 106 95 91 85 80 111 324
17 510 515 651 178 112 104 95 91 85 80 112 281
18 416 519 606 179 117 102 95 91 85 80 112 294
19 360 699 510 172 125 102 94 92 84 81 131 300
20 362 840 476 159 114 103 94 92 83 82 147 272
21 325 604 477 150 111 102 92 92 84 85 281 210
22 524 509 595 148 113 103 89 91 83 87 376 185
23 327 543 469 145 109 100 89 91 82 85 270 193
24 397 491 471 140 108 99 89 90 81 128 162 211
25 390 405 441 139 108 99 88 91 79 153 141 210
26 390 729 422 138 106 100 88 91 80 107 137 193
27 386 706 445 135 106 98 88 90 80 89 135 254
28 394 444 469 131 106 99 88 90 79 90 127 230
29 361 293 453 128 105 100 89 90 80 93 124 245
30 385   416 124 101 101 89 92 79 102 127 283
31 413   375   103   90 91   101   297