St. Louis, Missouri – A more seasonable winter pattern is expected to bring near-normal precipitation to Missouri and Illinois heading into mid-January, with above-normal temperatures allowing for a mix of rain and snow across the region.
According to the National Weather Service Climate Prediction Center, temperatures across Missouri and Illinois are favored to run above normal during the January 9–13 period, while precipitation trends closer to seasonal averages. This setup supports rain at times, with snow or a rain-snow mix possible when colder air briefly moves in.
Central and eastern Missouri, including St. Louis, Columbia, and Jefferson City, could see periods of rain during warmer stretches, with occasional snow mixing in during overnight or early morning hours. Roads such as I-70, I-44, and I-64 may experience changing conditions, especially during temperature swings.
Across Illinois, including Springfield, Peoria, Bloomington, and the Metro East, precipitation may alternate between rain and snow depending on timing and surface temperatures. Any snow accumulation is expected to be limited, though brief slick spots could develop if temperatures drop near freezing.
Drivers should remain alert for changing road conditions as temperatures fluctuate. Additional advisories may be issued closer to mid-January if colder air becomes more persistent or precipitation timing shifts, but widespread winter impacts are not currently expected.
