National Weather Service United States Department of Commerce

By early morning there should just be patchy light rain across parts of southeast Missouri and southwest Illinois. Lows tonight will range from the lower 30s in northeast Missouri and west central Illinois to the middle 30s in southeast Missouri and southwest Illinois.
Rain will continue tonight, especially this evening, and particularly across southwest Illinois. There may be some lingering rain across southeast Missouri and southwest Illinois Tuesday morning. Could not rule out a little light snow mixing in with the rain across southeast Missouri, but no accumulation is expected. Below normal temperatures can be expected Tuesday and Tuesday night, then warmer Thursday as a warm front pushes into the area. The warm front also results in a growing chance of showers beginning Thursday.