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USGS Daily Statistics for Illinois

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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
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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 1948-10-01 -> 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
1 915 812 971 1,060 1,300 960 936 358 136 160 221 434
2 875 865 924 1,050 1,380 971 834 406 172 152 227 476
3 803 883 865 1,060 1,340 911 688 461 222 179 251 521
4 780 886 871 1,090 1,300 887 599 472 244 189 270 555
5 791 895 919 1,070 1,250 893 554 444 227 181 267 543
6 778 840 936 1,050 1,210 887 493 403 203 185 263 537
7 760 804 967 979 1,190 899 417 374 180 204 253 545
8 775 775 993 938 1,220 901 371 338 156 187 241 538
9 717 776 1,010 913 1,290 903 394 317 126 189 225 510
10 635 821 991 912 1,280 875 426 282 102 197 208 502
11 611 822 955 937 1,290 858 409 223 93 218 193 530
12 578 816 947 1,070 1,270 867 393 184 77 207 184 543
13 573 814 955 1,160 1,280 839 354 171 85 209 184 566
14 630 821 980 1,300 1,250 868 347 157 91 256 198 556
15 629 776 972 1,270 1,210 981 338 149 136 258 208 559
16 628 739 969 1,170 1,170 1,040 343 153 183 272 229 565
17 590 756 971 1,100 1,210 1,070 339 155 237 261 276 560
18 549 755 989 1,030 1,260 1,130 315 149 241 255 321 538
19 571 729 1,040 1,070 1,260 1,110 287 137 241 236 351 502
20 615 741 1,080 1,060 1,210 1,090 308 137 233 197 386 467
21 627 827 1,100 1,070 1,160 1,010 358 128 212 171 414 441
22 680 902 1,100 1,120 1,170 1,010 370 124 182 157 426 430
23 714 998 1,080 1,120 1,130 1,060 327 106 195 154 417 426
24 718 1,060 1,070 1,160 1,060 1,020 294 95 188 160 400 454
25 689 1,140 1,070 1,200 969 982 265 83 177 169 316 501
26 677 1,150 1,060 1,190 999 995 241 80 184 174 390 532
27 698 1,120 1,040 1,130 1,020 972 240 83 204 188 384 581
28 713 1,060 1,030 1,120 1,030 936 250 84 193 188 396 682
29 717 452 1,040 1,120 1,020 893 250 85 188 183 400 856
30 740   1,010 1,180 978 897 271 93 177 203 401 950
31 763   1,040   975   321 104   227   961