Warning: Javascript must be enabled to use all the features on this page!


Page Loading - Please Wait...

Click to hideNews Bulletins

USGS Daily Statistics for Illinois

Click to hide state-specific text

! Statistics pages will be decommissioned in early 2026. Please find the modernized pages in WDFN that suit you best. Learn more about our modernization plans and timeline.

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 05576000 SOUTH FORK SANGAMON RIVER NEAR ROCHESTER, IL


Sangamon County, Illinois
Hydrologic Unit Code 07130007
Latitude  39°44'32", Longitude  89°34'02.2" NAD83
Drainage area 867  square miles
Gage datum 510.90 feet above NAVD88
Output formats
HTML table of all data
Tab-separated data
Reselect output format

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 1948-10-01 -> 2026-09-30)

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
1 915 812 971 1,050 1,290 952 924 355 135 158 218 434
2 875 865 924 1,040 1,370 962 824 402 170 150 224 476
3 803 883 865 1,050 1,330 902 680 456 219 176 248 521
4 780 886 871 1,080 1,300 879 592 466 241 186 267 555
5 791 895 919 1,070 1,240 895 547 438 224 178 264 543
6 778 840 936 1,050 1,210 892 488 398 201 183 259 537
7 760 804 967 991 1,180 899 412 369 178 201 250 545
8 775 775 993 953 1,220 900 367 334 154 185 238 538
9 717 776 1,010 931 1,280 903 394 313 125 187 222 510
10 635 821 991 934 1,270 874 425 279 101 195 206 502
11 611 822 955 959 1,280 854 411 221 92 215 190 530
12 578 816 947 1,090 1,260 861 393 182 76 204 181 543
13 573 814 955 1,170 1,270 833 354 169 84 206 181 566
14 630 821 980 1,300 1,240 862 347 155 90 253 195 556
15 629 776 972 1,270 1,200 974 336 147 134 254 205 559
16 628 739 969 1,160 1,160 1,030 341 152 181 268 226 565
17 590 756 971 1,090 1,200 1,060 336 153 234 257 272 560
18 549 755 989 1,020 1,250 1,120 313 147 238 252 316 538
19 571 729 1,040 1,060 1,250 1,100 285 135 238 233 351 502
20 615 741 1,080 1,050 1,200 1,080 307 136 230 195 386 467
21 627 827 1,100 1,060 1,160 1,000 359 127 210 169 414 441
22 680 902 1,100 1,120 1,170 999 376 123 179 155 426 430
23 714 998 1,080 1,120 1,130 1,050 334 105 192 153 417 426
24 718 1,060 1,070 1,160 1,060 1,010 301 94 185 158 400 454
25 689 1,140 1,070 1,200 968 971 271 82 175 167 316 501
26 677 1,150 1,050 1,190 995 984 247 79 182 172 390 532
27 698 1,120 1,030 1,130 1,010 960 243 82 202 185 384 581
28 713 1,060 1,020 1,110 1,020 925 252 83 191 186 396 682
29 717 452 1,020 1,120 1,010 883 250 84 186 180 400 856
30 740   1,000 1,170 970 886 269 92 175 200 401 950
31 763   1,030   967   318 103   224   961