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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 09519501 GILA R BLW GILLESPIE DAM, AZ (LOW-FLOW STATION)


Maricopa County, Arizona
Hydrologic Unit Code 15070101
Latitude  33°13'45", Longitude 112°46'00" NAD27
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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 1992-10-01 -> 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
1 135 773 1,340 897 321 22 3.9 11 12 33 42 84
2 377 781 1,240 961 302 19 5.1 8.9 12 33 43 80
3 437 719 1,340 860 278 14 6.6 6.8 13 33 46 78
4 466 656 1,490 811 248 16 6.7 4.4 11 33 45 89
5 543 532 1,390 827 225 16 5 4.8 8.9 34 43 85
6 698 538 1,480 820 194 14 3.4 6.9 11 36 42 85
7 861 629 2,530 771 99 15 4 8.9 13 50 47 85
8 1,170 673 1,950 837 86 14 5.6 7.7 20 45 46 99
9 5,150 873 1,720 883 183 15 8.2 7.6 88 40 42 98
10 2,460 1,240 1,190 862 215 16 6.8 7 91 35 39 99
11 3,000 1,240 1,090 750 281 12 10 23 59 31 36 99
12 2,600 1,230 989 624 249 12 8.1 17 40 29 37 88
13 2,390 837 909 573 205 7.4 7.3 10 31 31 40 83
14 2,560 839 989 733 213 4.6 7.5 9.7 22 34 41 79
15 2,550 1,210 947 739 229 5.3 14 9.1 19 48 42 80
16 3,110 2,780 955 599 224 4.9 8 11 25 49 74 70
17 2,920 1,850 991 446 244 5.5 10 11 18 47 66 75
18 3,500 1,360 1,030 398 184 9.2 9.9 8.8 16 46 64 77
19 3,310 1,110 1,240 348 48 9.9 14 10 14 42 57 75
20 2,750 1,730 1,420 257 29 9.4 12 17 14 47 56 73
21 3,320 2,760 1,410 200 24 9.7 8.7 19 18 43 54 74
22 3,270 2,340 1,430 176 25 8.8 5.8 22 19 39 59 77
23 2,600 2,150 1,580 172 18 6.5 4.8 39 17 42 60 96
24 2,300 1,880 1,750 161 18 5.8 5 20 18 42 58 111
25 1,930 1,520 2,010 135 22 4.7 5.7 11 24 40 57 114
26 1,500 1,440 1,350 113 102 6.8 18 10 24 40 61 99
27 1,080 1,290 1,040 98 146 5.9 7.4 11 25 49 65 79
28 891 1,310 1,010 89 144 5.4 6 18 21 45 67 86
29 747 191 894 213 107 4.2 8.6 31 32 40 72 86
30 681   821 248 39 3.4 10 39 24 41 78 98
31 685   807   26   12 17   41   100