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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 11458000 NAPA R NR NAPA CA


Napa County, California
Hydrologic Unit Code 18050002
Latitude  38°22'06", Longitude 122°18'08" NAD27
Drainage area 218  square miles
Gage datum 24.74 feet above NGVD29
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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 1959-10-01 -> 2023-09-30)

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
1 696 516 696 340 92 30 9 2.8 1.6 1.4 5.8 180
2 558 411 579 308 82 30 8.6 2.7 1.5 1.4 5.6 280
3 422 584 527 290 90 28 8.4 2.7 1.5 1.4 5.4 212
4 733 500 555 238 81 27 8.2 2.5 1.4 1.4 6 257
5 738 451 534 223 75 28 8.1 2.3 1.4 1.4 6.6 195
6 492 500 615 249 70 25 7.7 2.4 1.4 1.5 11 141
7 387 792 499 241 64 24 7.3 2.5 1.5 1.5 17 121
8 528 794 433 214 62 23 7 2.4 1.3 1.5 11 139
9 740 718 687 194 66 22 6.8 2.4 1.4 1.5 14 150
10 609 544 641 189 60 21 6.2 2.3 1.5 1.8 53 177
11 554 418 544 280 55 20 6 2.3 1.4 1.9 53 246
12 600 451 437 292 52 19 5.6 2.3 1.5 36 59 221
13 629 710 596 249 50 18 5.3 2.2 1.5 73 54 150
14 778 880 489 225 48 18 5 2.1 1.5 34 76 231
15 558 824 432 194 46 17 5 2.1 1.4 12 46 286
16 841 835 498 183 47 16 4.9 2.1 1.4 6.5 91 409
17 595 1,140 411 164 44 16 4.7 2.1 1.5 5.2 112 229
18 556 1,080 346 153 53 15 4.6 2.1 1.6 3.9 74 189
19 574 887 321 145 71 14 4.5 2.2 1.6 3.4 46 340
20 719 779 413 131 51 13 4.3 2.2 1.6 3.2 62 433
21 991 765 350 125 45 13 4.2 2.2 1.5 3 112 391
22 795 574 477 115 43 12 4.1 2 1.5 3.1 79 460
23 665 562 382 113 39 12 4.1 1.9 1.4 3.1 71 483
24 691 482 419 115 37 11 3.9 1.9 1.4 56 100 481
25 563 532 437 110 35 11 3.7 1.9 1.7 58 57 401
26 661 575 388 100 34 11 3.4 1.8 2.1 14 43 330
27 669 696 349 92 33 10 3.2 1.7 2 6.9 51 367
28 449 641 388 94 42 9.7 3.3 1.6 1.6 6.6 108 400
29 501 410 319 95 39 9.6 3.3 1.6 1.5 6.8 105 538
30 537   370 89 38 9.4 3.2 1.6 1.5 6.7 169 455
31 575   436   33   2.9 1.6   6.3   813