White Christmas
Will Seneca, IL have a white Christmas?
Seneca, Illinois had snow on the ground on Christmas morning in 10 of the 28 Christmases measured from 1996 to 2025. The last white Christmas there was in 2022. A coin flip.
Measured at Marseilles Lock/Dam, 8 miles west of Seneca. A white Christmas is an inch or more of snow on the ground at the Christmas morning reading, the line NOAA uses, counted from the station's own daily record.
The forecast for Christmas morning in Seneca starts on this page on December 18.