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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 05481000 Boone River near Webster City, IA


Hamilton County, Iowa
Hydrologic Unit Code 07100005
Latitude  42°25'55.1", Longitude  93°48'21.4" NAD83
Drainage area 844  square miles
Gage datum 989.38 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 1940-10-01 -> 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
1 184 104 489 1,230 979 1,100 1,120 319 309 303 257 200
2 173 110 474 1,140 995 1,020 1,050 268 295 312 277 202
3 160 110 510 1,060 1,020 973 925 236 269 308 282 188
4 144 110 532 1,010 1,030 967 802 221 224 311 270 178
5 139 133 547 999 1,070 1,010 731 209 252 331 257 169
6 154 140 601 1,040 1,070 963 740 248 234 333 250 169
7 146 132 633 1,040 1,050 949 712 227 215 313 250 172
8 136 120 581 998 989 1,060 715 214 227 326 243 171
9 127 120 548 924 986 1,080 816 198 235 367 222 161
10 120 149 553 855 940 1,230 830 221 234 387 213 155
11 114 164 589 821 896 1,140 827 297 228 412 207 154
12 106 160 695 873 898 1,100 756 232 203 425 210 156
13 103 168 824 906 905 1,120 663 217 195 389 214 177
14 103 181 935 965 934 1,190 594 220 183 349 219 218
15 94 215 968 1,010 921 1,260 586 242 171 321 219 239
16 93 235 1,000 1,010 908 1,220 514 307 183 299 220 226
17 99 279 1,000 970 912 1,240 539 271 200 277 226 210
18 101 335 1,030 903 942 1,320 551 242 200 299 227 201
19 101 373 1,040 859 966 1,370 518 227 220 302 224 185
20 106 447 1,040 868 986 1,380 521 316 275 286 223 172
21 110 483 979 899 981 1,450 458 378 366 280 233 160
22 108 489 944 928 1,040 1,420 485 343 400 282 235 150
23 107 476 924 922 1,090 1,400 516 382 444 292 232 143
24 105 462 930 908 1,170 1,450 488 362 429 295 226 146
25 106 422 964 948 1,220 1,390 407 336 424 279 216 162
26 102 390 970 945 1,280 1,390 409 301 401 264 209 167
27 97 414 1,000 963 1,290 1,440 385 271 382 248 212 171
28 97 446 1,110 959 1,270 1,420 336 261 368 235 210 199
29 97 560 1,150 928 1,230 1,320 313 291 358 233 205 193
30 100   1,200 929 1,220 1,250 290 303 327 241 197 190
31 104   1,230   1,130   317 321   245   182