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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 11303500 SAN JOAQUIN R NR VERNALIS CA


San Joaquin County, California
Hydrologic Unit Code 18040003
Latitude  37°40'34", Longitude 121°15'55" NAD27
Drainage area 13,539  square miles
Gage datum 2.57 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 1923-10-01 -> 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 4,250 5,510 7,360 7,230 7,380 7,550 4,050 1,500 1,540 1,910 2,280 2,360
2 4,260 5,500 7,300 7,270 7,280 7,430 3,860 1,490 1,540 1,930 2,250 2,390
3 4,220 5,550 7,270 7,190 7,210 7,370 3,680 1,490 1,530 1,970 2,210 2,450
4 4,450 5,590 7,280 7,120 7,190 7,370 3,570 1,490 1,530 2,000 2,180 2,490
5 4,520 5,660 7,300 7,080 7,200 7,330 3,490 1,470 1,540 2,020 2,150 2,670
6 4,400 5,740 7,290 7,080 7,260 7,260 3,390 1,460 1,550 2,030 2,100 2,790
7 4,410 5,770 7,300 7,120 7,300 7,110 3,310 1,450 1,560 2,050 2,030 2,870
8 4,380 5,820 7,250 7,160 7,350 6,980 3,220 1,440 1,580 2,100 1,990 3,090
9 4,400 5,910 7,220 7,270 7,360 6,880 3,110 1,440 1,590 2,110 1,980 3,440
10 4,440 6,050 7,210 7,330 7,380 6,770 3,000 1,430 1,600 2,100 1,970 3,440
11 4,500 6,170 7,240 7,320 7,390 6,670 2,930 1,420 1,610 2,120 1,960 3,310
12 4,530 6,390 7,280 7,360 7,400 6,580 2,860 1,420 1,620 2,150 1,950 3,260
13 4,530 6,540 7,190 7,360 7,390 6,440 2,760 1,420 1,640 2,180 1,930 3,200
14 4,470 6,650 7,140 7,330 7,340 6,280 2,670 1,420 1,650 2,230 1,940 3,100
15 4,460 6,740 7,170 7,280 7,300 6,150 2,570 1,420 1,700 2,280 1,950 3,020
16 4,600 6,780 7,180 7,280 7,320 6,050 2,470 1,420 1,720 2,330 1,960 3,000
17 4,740 6,880 7,250 7,320 7,340 5,940 2,390 1,430 1,720 2,340 1,970 3,020
18 4,880 7,000 7,320 7,350 7,320 5,780 2,310 1,440 1,740 2,330 1,980 3,030
19 4,990 7,110 7,340 7,320 7,340 5,650 2,200 1,460 1,760 2,310 2,000 3,040
20 4,990 7,230 7,310 7,300 7,410 5,560 2,080 1,470 1,780 2,290 2,050 3,040
21 5,000 7,300 7,290 7,320 7,470 5,490 1,980 1,470 1,790 2,290 2,160 3,050
22 5,070 7,340 7,180 7,320 7,470 5,390 1,880 1,470 1,790 2,310 2,270 3,080
23 5,220 7,340 7,090 7,270 7,480 5,300 1,810 1,480 1,810 2,300 2,370 3,130
24 5,220 7,360 7,030 7,240 7,490 5,160 1,740 1,480 1,820 2,290 2,350 3,310
25 5,260 7,350 6,960 7,250 7,490 5,020 1,700 1,490 1,840 2,330 2,330 3,650
26 5,370 7,330 7,000 7,260 7,540 4,810 1,650 1,500 1,850 2,360 2,320 3,780
27 5,530 7,300 7,060 7,300 7,570 4,670 1,620 1,510 1,860 2,380 2,290 3,660
28 5,580 7,250 7,080 7,360 7,630 4,500 1,590 1,510 1,860 2,380 2,290 3,850
29 5,670 7,440 7,080 7,390 7,700 4,370 1,570 1,520 1,870 2,360 2,300 4,000
30 5,630   7,140 7,410 7,700 4,200 1,540 1,530 1,890 2,320 2,320 4,080
31 5,550   7,160   7,650   1,520 1,530   2,310   4,180