Provisional Monthly Streamflow Network - Tabular Data: January 2025
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Long-term monthly flows for period of record (cfs) | ||||||||
| Station | Drainage area (sq. mi.) |
Years of record | Monthly mean flow (cfs) | Mean flow* | Median (50% exceedence) flow | 90% exceedence flow | 10% exceedence flow | USGS Station No. |
| Rock River at Rockton |
6,363 |
85 |
4,400 |
3,634 |
3,206 |
1,406 |
6,916 |
|
| Rock River near Joslin |
9,549 |
85 |
8,806 |
6,010 |
5,165 |
2,052 |
12,860 |
|
| Pecatonica River at Freeport |
1,326 |
109 |
N/A |
819 |
665 |
320 |
1,663 |
|
| Green River near Geneseo |
1,003 |
88 |
N/A |
594 |
418 |
103 |
1,429 |
|
| Edwards River near New Boston |
445 |
90 |
N/A |
252 |
141 |
27 |
635 |
|
| Kankakee River at Momence |
2,294 |
110 |
N/A |
2,370 |
2,216 |
834 |
4,624 |
|
| Iroquois River near Chebanse |
2,091 |
101 |
N/A |
2,111 |
1,679 |
151 |
4,794 |
|
| Fox River at Dayton |
2,642 |
110 |
N/A |
1,628 |
1,237 |
440 |
3,333 |
|
| Vermilion River at Pontiac |
579 |
82 |
N/A |
442 |
260 |
11 |
1,222 |
|
| Spoon River at Seville |
1,636 |
110 |
N/A |
1,036 |
657 |
86 |
2,908 |
|
| LaMoine River at Ripley |
1,293 |
103 |
N/A |
638 |
345 |
35 |
1,601 |
|
| Bear Creek near Marcelline |
349 |
80 |
N/A |
150 |
64 |
4 |
436 |
|
| Mackinaw River near Congerville |
767 |
80 |
N/A |
537 |
285 |
26 |
1,488 |
|
| Salt Creek near Greenview |
1,804 |
83 |
N/A |
1,334 |
860 |
134 |
3,377 |
|
| Sangamon River at Monticello |
550 |
114 |
N/A |
456 |
267 |
19 |
1,213 |
|
| So. Fork Sangamon near Rochester |
867 |
75 |
N/A |
700 |
384 |
10 |
2,340 |
|
| Illinois River at Valley City |
26,743 |
86 |
10,880 |
22,081 |
17,120 |
6,760 |
47,630 |
|
| Macoupin Creek near Kane |
868 |
96 |
N/A |
576 |
265 |
7 |
1,623 |
|
| Vermilion River near Danville |
1,290 |
103 |
N/A |
1,249 |
811 |
58 |
3,099 |
|
| Kaskaskia River at Vandalia |
1,940 |
55 |
N/A |
2,620 |
2,091 |
271 |
5,338 |
|
| Shoal Creek near Breese |
735 |
82 |
443 |
746 |
410 |
30 |
2,068 |
|
| Embarras River at Ste. Marie |
1,516 |
113 |
N/A |
1,776 |
1,132 |
91 |
4,590 |
|
| Skillet Fork at Wayne City |
464 |
107 |
685 |
671 |
380 |
15 |
1,965 |
|
| Little Wabash below Clay City |
1,131 |
110 |
763 |
1,492 |
801 |
52 |
4,367 |
|
| Big Muddy at Plumfield |
794 |
54 |
1,250 |
904 |
708 |
97 |
2,184 |
|
| Cache River at Forman |
244 |
102 |
570 |
513 |
387 |
41 |
1,228 |
|
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Choose another month Station Numbers are linked to the U.S. Geological Survey, providing more information about each station. Notes: Much below normal flow = 90-100% chance of exceedence. Below normal flow = 70-90% chance of exceedence. Normal flow = 30-70% chance of exceedence. Above normal flow = 10-30% chance of exceedence. Much above normal flow = 0-10% chance of exceedence. * As reported in U.S. Geological Survey (USGS) Water Resources Data, Illinois, Water Year 2023. For best results when printing this page, change your layout to "Landscape". Streamflow Data |