National Weather Service United States Department of Commerce

Temperatures are expected to remain cool, about 10 to 15 degrees below normal for the next week or so. Monday looks even colder following the passage of a cold front.
A chance for light snow remains in the forecast Saturday, mainly in the morning. Snow is expected to changeover to rain through the day. Some accumulation is possible mainly across northern parts of SEMO and along the adjacent I-64 corridor in southern Illinois and southwest Indiana.
Forecast confidence has increased for this weekend. Precipitation will spread eastward into southeast Missouri and southern Illinois generally at or just after daybreak Saturday. It may begin as some light snow, but with temperatures expected to be just above freezing, any travel impacts will be brief and isolated. In addition, as the rain ends Sunday, a brief change over to snow cannot be ruled out. Temperatures should be well above freezing, so no impacts are expected Sunday.