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USGS Daily Statistics for Hawaii

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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 16605500 Wailuku River at Iao Valley Road, Maui, HI


Maui County, Hawaii
Hydrologic Unit Code 20020000
Latitude  20°52'58.7", Longitude 156°32'01.8" NAD83
Drainage area 6.59  square miles
Gage datum 663 feet above LMSL
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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 2019-10-01 -> 2022-09-30)

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 52 32 100 50 56 20 14 25 16 22 11 89
2 40 24 66 35 44 18 19 29 13 26 9.9 39
3 265 32 37 88 49 16 52 32 16 48 25 43
4 164 25 33 293 46 16 28 23 13 32 17 30
5 57 20 42 381 35 14 31 41 15 17 9.6 42
6 33 31 69 295 25 21 23 52 16 14 8.6 42
7 43 28 44 103 45 29 25 63 17 13 11 29
8 59 20 143 80 184 18 22 33 25 15 9.6 24
9 137 20 230 47 56 37 17 63 33 36 10 19
10 122 80 52 39 47 51 24 64 20 25 12 17
11 121 68 35 55 34 19 16 59 16 30 16 15
12 141 33 37 36 40 26 14 31 19 29 11 15
13 59 30 245 61 40 18 16 33 15 25 12 25
14 36 25 47 34 31 26 57 34 28 22 9.2 16
15 44 22 37 30 29 36 24 51 19 59 8.9 16
16 29 22 168 27 28 92 15 25 15 70 9.4 43
17 59 78 469 27 24 35 18 23 16 27 21 47
18 374 60 301 28 28 21 30 25 18 20 67 24
19 169 73 89 23 26 19 27 23 16 16 48 21
20 62 52 67 21 38 16 20 44 15 15 91 46
21 40 25 52 21 69 17 36 29 15 15 90 185
22 33 20 47 19 42 15 16 96 14 14 171 48
23 33 18 41 19 41 16 39 119 57 15 269 28
24 27 20 30 31 28 23 87 83 26 15 344 21
25 30 24 39 25 25 15 98 40 21 14 63 73
26 34 27 31 22 21 14 249 26 36 11 39 121
27 28 50 66 23 19 15 51 26 44 11 39 33
28 23 107 47 21 17 16 59 17 30 11 43 25
29 38 53 94 48 20 14 77 16 18 12 34 21
30 55   101 87 16 18 61 16 25 8.4 22 20
31 69   65   15   33 17   11   24