Vandalia Lake Marina
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Boat launches near Vandalia Lake Marina
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Typical flow by month
1970 to 2026
The water at Vandalia Lake Marina typically runs highest in March, at a median 2,060 cfs, and lowest in October, at 103 cfs. The highest flow on record for any single day is 48,100 cfs, in 2016.
| Month | Typical (cfs) | Usual range (cfs) | Relative level |
|---|---|---|---|
| January | 1,890 | 742 to 3,600 | |
| February | 1,900 | 732 to 3,950 | |
| March | 2,060 | 1,050 to 4,220 | |
| April | 1,905 | 854 to 3,540 | |
| May | 1,310 | 432 to 2,600 | |
| June | 1,275 | 487 to 2,265 | |
| July | 1,290 | 434 to 2,000 | |
| August | 658 | 114 to 1,510 | |
| September | 171 | 72 to 593 | |
| October | 103 | 64 to 667 | |
| November | 321 | 87 to 1,030 | |
| December | 1,270 | 181 to 2,300 |
Typical is the median of each month’s daily median values, and the usual range runs from the median 25th to the median 75th percentile, across about 57 years of record. Statistics published by the US Geological Survey for Kaskaskia River at Vandalia, IL (site 05592500). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.
Current conditions
Streamflow
161 cfs
Normal (52nd)
Water level
3.46 ft
High today
67°F
Wind
10 kt
Gusts 17 kt
Rain chance
5%
Week ahead
Forecast from Open-Meteo global models (NOAA & ECMWF). See full conditions →
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