Rain builds in across the St. Louis region Sunday morning, becoming widespread by midday. Expect heavy rain through the afternoon and evening. By the time the rain ends Monday morning, the region should see 1-2 inches. As for temperatures, still warm ahead of the cold front Sunday with highs near 60°. Colder air returns by Monday morning, temperatures in the upper 30°s. Any lingering rain showers could mix with or change over to some light snow. No accumulation in the St. Louis area. -Angela Hutti @AngWxGrl