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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
1 183 103 484 1,220 985 1,100 1,140 350 309 303 257 198
2 172 109 470 1,140 998 1,010 1,070 301 295 312 277 200
3 158 109 505 1,070 1,020 971 935 269 269 308 282 187
4 143 109 527 1,020 1,030 974 808 248 224 311 270 176
5 138 132 542 1,000 1,070 1,030 747 229 252 331 257 168
6 152 139 595 1,040 1,070 977 778 262 234 333 250 168
7 145 131 628 1,040 1,050 962 735 239 215 313 248 170
8 135 119 576 997 987 1,080 730 223 227 326 240 170
9 126 119 548 922 983 1,100 824 205 235 367 220 159
10 119 147 558 854 937 1,240 841 228 234 387 211 153
11 113 163 595 819 893 1,150 850 302 228 412 205 152
12 105 158 699 869 895 1,110 807 237 203 425 207 154
13 103 166 826 903 901 1,120 702 222 195 389 212 175
14 102 179 934 960 930 1,200 618 224 183 349 217 216
15 93 213 968 1,000 917 1,270 601 246 171 321 217 236
16 93 233 1,000 1,010 903 1,230 526 312 183 299 218 223
17 98 276 1,000 963 907 1,250 549 275 200 277 224 208
18 100 332 1,030 898 936 1,330 557 249 200 299 225 199
19 100 369 1,030 855 960 1,380 538 237 220 302 222 184
20 105 442 1,040 869 991 1,400 576 329 275 286 221 171
21 108 478 973 902 1,010 1,470 521 392 366 280 231 158
22 107 483 941 932 1,060 1,440 536 356 400 282 233 149
23 106 471 925 928 1,110 1,410 557 390 444 292 229 142
24 104 457 934 916 1,190 1,450 530 367 429 295 224 145
25 105 417 966 969 1,230 1,390 454 339 424 279 214 161
26 101 386 971 968 1,280 1,400 443 303 401 264 207 166
27 96 409 1,000 982 1,290 1,490 412 271 382 248 210 169
28 96 441 1,110 973 1,270 1,470 359 261 368 235 208 197
29 96 560 1,140 939 1,230 1,370 331 291 358 233 203 191
30 99   1,190 936 1,220 1,290 313 303 327 241 195 188
31 103   1,230   1,130   349 321   245   180