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USGS Daily Statistics for the Nation

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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 -> 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 1,170 652 1,070 1,230 1,450 1,070 796 203 123 104 398 800
2 1,080 608 1,050 1,160 1,520 1,010 693 134 124 109 380 820
3 863 599 1,050 1,140 1,510 1,080 651 125 102 127 410 832
4 837 677 1,040 1,200 1,580 1,290 612 95 119 125 429 840
5 966 853 995 1,070 1,490 1,350 614 109 150 115 415 737
6 896 961 997 1,040 1,240 1,290 527 79 85 88 372 667
7 823 967 1,020 1,070 1,170 1,330 440 82 87 106 333 701
8 752 981 1,040 1,070 1,260 1,140 426 71 114 103 315 702
9 683 1,000 1,030 966 1,320 1,020 508 63 101 174 251 625
10 656 916 1,210 925 1,280 903 502 59 108 180 235 644
11 826 749 1,160 986 1,300 942 526 51 122 187 229 701
12 933 717 1,230 1,120 1,430 1,010 593 52 156 197 255 711
13 1,030 877 1,330 1,080 1,340 1,170 664 98 133 183 303 724
14 942 831 1,340 1,290 1,470 1,180 606 105 365 210 340 660
15 905 787 1,220 1,430 1,340 1,190 628 142 394 193 375 599
16 872 720 1,150 1,300 1,500 1,160 671 134 327 203 421 675
17 818 801 1,080 1,170 1,600 1,010 509 198 298 199 531 657
18 708 847 1,000 1,080 1,560 967 390 175 274 211 573 625
19 693 764 1,070 1,160 1,620 1,000 324 183 226 208 654 548
20 667 823 1,100 1,220 1,460 1,140 300 114 189 228 655 492
21 679 1,070 1,070 1,200 1,330 1,010 233 75 156 247 665 501
22 667 1,150 1,000 1,210 1,190 1,010 250 69 118 213 596 540
23 716 1,260 947 1,110 1,080 1,100 236 65 102 229 565 585
24 795 1,350 897 970 1,010 954 195 65 99 257 529 695
25 798 1,470 866 993 1,060 808 264 69 102 326 550 818
26 755 1,450 881 1,020 1,270 851 366 78 98 292 586 796
27 734 1,350 949 1,010 1,270 818 386 138 99 355 606 999
28 749 1,250 1,090 1,110 1,320 916 387 164 101 429 710 1,110
29 696 459 1,140 1,150 1,300 816 343 176 96 412 717 1,280
30 640   1,100 1,330 1,190 848 286 136 113 406 746 1,340
31 656   1,240   1,130   248 127   463   1,240