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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 05573540 SANGAMON RIVER AT ROUTE 48 AT DECATUR, IL


Macon County, Illinois
Hydrologic Unit Code 07130006
Latitude  39°49'52", Longitude  88°58'35" NAD83
Drainage area 938  square miles
Contributing drainage area 938.00  square miles
Gage datum 583.17 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 1982-10-01 -> 2023-09-30)

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 1,200 611 1,110 1,280 1,450 1,090 833 213 132 111 427 836
2 1,090 575 1,090 1,170 1,520 1,040 727 138 133 116 408 857
3 866 576 1,090 1,130 1,510 1,120 682 132 109 137 440 871
4 845 663 1,090 1,210 1,570 1,330 641 101 127 134 460 880
5 984 859 1,040 1,060 1,490 1,370 644 117 161 123 442 771
6 911 978 1,040 998 1,240 1,300 552 85 91 95 388 698
7 837 987 1,070 1,040 1,190 1,340 453 88 94 114 336 734
8 766 1,010 1,070 1,050 1,290 1,130 442 76 123 111 321 735
9 698 1,030 1,060 943 1,350 1,010 525 67 109 187 255 650
10 671 944 1,230 904 1,310 915 495 64 116 194 240 666
11 845 769 1,180 971 1,340 967 531 55 131 200 234 727
12 948 736 1,250 1,130 1,480 1,040 605 55 168 211 264 738
13 1,040 907 1,360 1,090 1,380 1,210 689 105 143 196 317 754
14 943 859 1,370 1,320 1,510 1,210 630 112 392 225 357 689
15 908 817 1,240 1,470 1,380 1,230 651 152 423 207 394 625
16 880 748 1,180 1,340 1,560 1,200 648 143 352 218 444 706
17 829 833 1,110 1,220 1,660 1,030 496 212 321 213 550 689
18 719 880 1,030 1,120 1,620 990 395 188 294 226 593 655
19 706 791 1,100 1,200 1,670 1,030 311 197 243 223 677 574
20 682 852 1,120 1,250 1,500 1,180 268 122 203 244 678 514
21 696 1,120 1,100 1,230 1,360 1,050 230 80 167 265 688 523
22 688 1,200 1,030 1,240 1,210 1,050 259 74 127 228 617 559
23 737 1,310 978 1,130 1,090 1,140 247 70 110 246 584 604
24 810 1,410 930 984 1,030 989 204 70 105 276 547 720
25 792 1,540 899 1,010 1,050 837 276 74 109 350 571 848
26 704 1,510 914 1,040 1,270 883 383 83 106 313 610 825
27 649 1,410 984 1,030 1,280 850 405 148 107 381 631 1,040
28 646 1,300 1,130 1,110 1,330 954 406 177 108 460 740 1,160
29 595 473 1,180 1,150 1,320 851 358 189 103 442 748 1,330
30 551   1,140 1,320 1,210 886 298 146 121 436 779 1,390
31 588   1,280   1,150   264 136   497   1,270