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USGS Daily Statistics for the Nation

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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 06600100 Floyd River at Alton, IA


Sioux County, Iowa
Hydrologic Unit Code 10230002
Latitude  42°58'58.1", Longitude  96°00'01.2" NAD83
Drainage area 268  square miles
Gage datum 1,270.17 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 1955-10-01 -> 2026-09-30)

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 36 26 112 266 169 200 189 77 32 56 63 46
2 34 25 141 231 179 180 171 66 31 60 61 46
3 35 28 179 225 172 183 150 67 30 59 55 44
4 33 27 161 300 155 199 146 55 29 56 53 43
5 32 27 129 241 149 242 137 52 36 56 51 42
6 31 28 121 258 155 188 149 57 40 60 51 41
7 30 28 124 233 165 181 130 67 36 60 49 41
8 30 29 98 180 156 204 120 88 34 67 48 40
9 31 64 87 159 156 172 126 66 35 74 47 38
10 29 85 94 147 173 168 136 63 34 76 48 38
11 28 57 122 146 173 158 135 85 33 71 50 40
12 29 61 175 176 154 182 122 115 32 65 53 41
13 28 63 229 191 155 256 119 63 32 62 54 41
14 27 49 459 172 154 244 147 62 36 58 53 43
15 26 46 292 152 144 219 120 54 40 59 51 45
16 26 50 224 147 138 216 91 49 51 59 50 44
17 27 67 187 141 138 244 90 51 59 60 52 44
18 28 81 182 139 142 247 98 45 65 60 54 42
19 34 127 182 145 136 259 81 42 54 59 56 38
20 34 101 165 148 132 296 74 43 178 56 55 36
21 35 77 182 155 142 386 77 41 155 55 54 35
22 31 70 188 160 152 620 86 52 88 55 53 34
23 29 74 256 202 149 355 116 52 77 57 52 34
24 26 73 188 202 155 278 147 56 70 66 51 33
25 25 65 184 147 164 234 101 40 67 71 48 33
26 25 58 175 145 181 234 75 38 61 66 47 40
27 25 69 209 147 278 222 66 36 55 61 47 41
28 25 84 331 151 226 240 63 42 50 56 46 44
29 25 121 326 160 211 199 63 39 50 53 46 40
30 25   237 154 201 182 91 36 54 52 46 44
31 26   217   209   116 36   58   44