Springfield, IL – Temperatures are dropping into the mid-30s overnight, allowing frost to form by 1 a.m. Sunday and potentially creating slick spots on bridges and rural roads during the early morning commute. Sensitive vegetation is also at risk as cold air settles across central Illinois.
According to the National Weather Service in Lincoln, a Frost Advisory remains in effect until 8 a.m. Sunday for much of the region, including Springfield, Peoria, Bloomington, and Champaign. A stronger system follows, with a Freeze Watch in place from late Sunday night through 8 a.m. Monday, when temperatures could fall below 32 degrees across a wider area.
Cities along I-55 and I-74 corridors, including Lincoln, Decatur, and Galesburg, may see the most widespread frost tonight, followed by a more significant freeze Sunday night. Overnight lows could dip into the upper 20s to low 30s, especially in rural and low-lying areas where cold air pools. While conditions remain mostly dry, any residual moisture could freeze on untreated surfaces.
Residents should cover plants, bring sensitive vegetation indoors, and avoid using sprinklers overnight to prevent ice formation on sidewalks and roads. Drivers should use caution during early morning hours, particularly on elevated surfaces.
Frost risks ease after sunrise Sunday, but freezing conditions return late Sunday night into Monday morning. Additional advisories may be issued as temperatures trend colder.
