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USGS Daily Statistics for Iowa

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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 05471050 South Skunk River at Colfax, IA


Jasper County, Iowa
Hydrologic Unit Code 07080105
Latitude  41°40'54.5", Longitude  93°14'48.6" NAD83
Drainage area 803  square miles
Gage datum 770.00 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 1985-10-01 -> 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
1 278 203 481 878 1,090 1,440 1,360 555 654 365 375 309
2 279 202 501 840 1,120 1,360 1,300 459 646 441 346 319
3 260 206 530 756 1,070 1,230 1,130 426 544 470 333 303
4 243 227 555 739 1,090 1,200 1,070 432 470 434 342 286
5 237 221 583 704 1,140 1,250 1,020 402 418 419 336 273
6 233 213 606 675 1,090 1,260 1,080 361 404 396 342 261
7 227 214 592 672 1,090 1,200 1,020 346 456 378 344 254
8 227 225 649 654 1,130 1,230 893 346 441 373 326 249
9 220 244 728 710 1,160 1,190 924 469 392 419 304 242
10 209 292 858 746 1,280 1,200 957 668 367 457 290 237
11 205 325 917 714 1,190 1,230 1,020 881 349 483 279 234
12 198 275 921 763 1,140 1,340 1,180 819 397 514 281 234
13 190 238 1,100 843 1,300 1,410 1,160 888 363 487 284 274
14 196 244 1,220 821 1,230 1,430 966 953 316 484 301 384
15 188 282 1,250 864 1,100 1,570 827 734 279 492 294 418
16 190 319 1,180 870 1,020 1,600 758 612 281 471 297 429
17 213 317 1,040 806 1,050 1,530 729 562 313 427 352 407
18 199 374 959 817 1,100 1,600 744 537 348 400 334 350
19 194 478 930 830 1,050 1,730 758 612 346 424 305 308
20 197 556 898 843 1,130 1,770 838 602 342 408 297 291
21 211 561 853 878 1,280 1,620 799 622 395 373 293 282
22 219 544 798 888 1,320 1,610 696 536 390 374 290 273
23 217 485 767 936 1,290 1,480 625 467 415 397 283 273
24 204 456 790 906 1,340 1,410 626 457 428 430 272 274
25 196 419 822 954 1,530 1,360 712 393 456 391 264 280
26 198 385 800 1,080 1,670 1,390 630 388 513 368 255 282
27 192 407 774 1,220 1,690 1,390 552 455 464 345 285 286
28 187 495 740 1,220 1,600 1,350 602 388 411 325 304 330
29 183 583 703 1,150 1,490 1,250 601 495 384 321 303 322
30 182   722 1,040 1,520 1,240 658 553 363 403 310 297
31 191   817   1,530   657 546   406   274