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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 11264500 MERCED R A HAPPY ISLES BRIDGE NR YOSEMITE CA


Mariposa County, California
Hydrologic Unit Code 18040008
Latitude  37°43'53", Longitude 119°33'29" NAD27
Drainage area 181  square miles
Gage datum 4,020.46 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 1915-10-01 -> 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
1 105 119 130 312 961 1,400 799 218 50 47 48 54
2 157 104 133 324 989 1,400 789 197 46 47 51 59
3 127 94 133 335 1,030 1,400 752 184 46 36 49 89
4 91 93 137 351 1,070 1,410 712 171 48 32 45 67
5 85 104 140 367 1,100 1,450 693 167 67 31 44 64
6 78 103 143 382 1,110 1,440 678 163 71 29 46 80
7 78 108 143 440 1,110 1,400 651 150 57 29 43 77
8 92 117 157 439 1,120 1,370 615 142 51 30 49 72
9 102 117 166 434 1,130 1,360 590 136 46 29 49 63
10 88 111 175 443 1,130 1,340 550 133 48 28 51 70
11 89 106 172 487 1,150 1,330 515 122 43 32 64 112
12 90 106 169 493 1,200 1,290 497 117 41 30 62 78
13 98 109 175 506 1,240 1,280 490 109 36 28 52 65
14 90 119 180 521 1,280 1,280 482 105 35 31 55 63
15 89 118 185 542 1,310 1,270 465 108 34 31 55 65
16 92 126 193 553 1,380 1,260 455 108 31 35 53 67
17 91 122 208 570 1,370 1,200 436 102 29 38 60 61
18 91 128 215 586 1,380 1,180 407 95 29 34 91 60
19 91 131 218 597 1,380 1,170 391 86 36 32 105 64
20 88 124 227 633 1,380 1,160 375 78 30 31 96 68
21 94 119 234 678 1,390 1,120 362 75 28 29 89 66
22 95 116 244 722 1,390 1,100 341 73 28 28 72 99
23 93 115 244 739 1,410 1,070 330 72 28 29 64 202
24 92 116 252 746 1,420 1,020 312 70 30 37 64 143
25 94 117 266 758 1,440 970 307 66 38 77 59 102
26 94 118 269 784 1,440 939 300 62 51 56 57 88
27 90 123 272 813 1,460 919 279 57 32 46 55 86
28 86 131 275 852 1,480 890 259 56 32 55 55 81
29 85 125 280 873 1,450 851 249 53 43 49 58 80
30 87   288 911 1,400 819 244 50 38 72 56 84
31 97   301   1,400   235 52   54   97