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USGS Daily Statistics for the Nation

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
1 278 205 489 890 1,080 1,450 1,360 477 653 365 375 313
2 280 204 511 850 1,110 1,380 1,310 404 650 441 346 323
3 262 208 540 760 1,070 1,250 1,130 385 547 470 333 308
4 245 230 564 743 1,090 1,220 1,070 400 471 434 342 289
5 239 224 586 708 1,140 1,260 1,020 375 419 419 336 276
6 235 216 606 679 1,090 1,270 1,080 337 406 396 342 264
7 229 217 591 676 1,100 1,220 1,000 321 459 378 344 257
8 229 228 647 659 1,140 1,240 884 321 441 373 326 252
9 223 248 726 717 1,180 1,210 923 452 392 419 304 245
10 210 297 852 754 1,300 1,210 960 635 367 457 290 240
11 207 331 909 722 1,210 1,250 1,020 794 349 483 279 238
12 200 280 918 772 1,150 1,360 1,130 754 397 514 281 238
13 191 242 1,110 855 1,310 1,430 1,130 850 363 487 284 279
14 197 249 1,230 832 1,250 1,460 951 931 316 484 301 392
15 189 288 1,260 877 1,110 1,600 817 715 279 492 294 427
16 192 325 1,190 884 1,040 1,620 750 594 281 471 297 438
17 215 323 1,050 818 1,070 1,550 721 546 313 427 352 416
18 201 382 971 829 1,120 1,620 738 523 348 400 334 357
19 196 488 942 843 1,070 1,750 745 600 346 424 307 314
20 199 568 908 856 1,110 1,780 781 590 342 408 298 296
21 214 573 859 889 1,220 1,630 714 614 395 373 294 287
22 222 555 801 895 1,250 1,610 631 529 390 374 291 277
23 219 494 770 941 1,250 1,490 571 460 415 397 284 277
24 207 464 794 891 1,320 1,420 564 451 428 430 273 279
25 198 425 828 906 1,520 1,360 617 386 456 391 266 285
26 200 390 807 1,020 1,680 1,380 549 382 513 368 256 287
27 194 413 781 1,180 1,700 1,340 494 452 464 345 287 290
28 189 503 747 1,200 1,610 1,290 555 385 411 325 308 335
29 185 583 709 1,130 1,510 1,210 556 496 384 321 307 326
30 183   729 1,030 1,540 1,230 592 556 363 403 314 299
31 193   827   1,550   553 546   406   274