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USGS Daily Statistics for Iowa

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Boating safety tips are available from the U.S. Coast Guard.

NOTE: Station Numbers for Iowa precipitation gages have changed (see list).


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 05470000 South Skunk River near Ames, IA


Story County, Iowa
Hydrologic Unit Code 07080105
Latitude  42°03'59.7", Longitude  93°37'12.9" NAD83
Drainage area 315  square miles
Gage datum 888.73 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 1920-10-01 -> 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 79 68 198 391 313 393 393 139 101 125 140 95
2 75 69 183 335 314 390 342 129 92 139 131 91
3 71 67 208 310 319 350 319 109 98 134 116 88
4 66 72 236 313 324 344 327 101 82 129 111 83
5 66 101 250 304 324 322 287 91 79 117 112 85
6 73 98 260 313 304 338 250 92 100 111 118 93
7 68 72 263 287 328 315 232 97 100 107 124 86
8 59 72 240 260 341 323 234 99 107 113 115 81
9 52 83 260 270 348 400 325 147 90 143 103 76
10 49 89 278 259 330 356 226 172 74 150 102 72
11 50 84 308 262 290 390 233 212 83 160 101 71
12 47 68 340 305 303 443 233 172 87 167 114 76
13 45 75 410 318 328 521 205 118 92 146 107 92
14 50 98 464 303 336 491 195 99 113 131 105 117
15 48 136 424 311 286 488 193 77 100 134 100 132
16 55 142 398 311 299 463 178 109 101 123 100 106
17 59 128 365 304 292 461 218 99 114 111 110 89
18 72 133 369 300 297 458 184 108 106 113 105 80
19 75 169 413 280 368 487 185 103 119 115 103 77
20 67 195 413 274 372 428 178 116 157 103 102 70
21 65 190 344 282 338 382 150 136 157 99 100 68
22 60 181 308 275 357 420 136 124 130 112 97 67
23 55 201 326 272 338 459 153 122 114 123 98 68
24 51 188 339 264 344 391 149 118 116 125 93 71
25 51 163 341 295 369 446 132 92 120 111 89 81
26 52 156 321 333 395 379 124 107 134 99 87 81
27 54 169 339 321 436 395 141 115 134 92 94 86
28 53 177 341 299 428 402 141 128 119 90 98 101
29 58 170 346 283 403 353 154 189 124 97 98 94
30 59   367 286 461 386 157 175 132 119 96 100
31 57   368   395   146 114   134   90