Fort Wayne, IN – Indiana wakes up to calm skies this Sunday morning, but subtle changes are already forming that could shape Halloween week. A stretch of mild, sunny days is giving way to developing showers by Tuesday — a system that will usher in cooler, brisker air for the back half of the week.
According to the National Weather Service, Sunday and Monday remain pleasant, with highs near 59°F and light east winds. By Tuesday afternoon, clouds will thicken across Allen County and the I-69 corridor, bringing a 20–40% chance of rain through Wednesday night. Roads may turn slick at times, and temperatures will dip into the low 40s by midweek. Commuters and outdoor workers should plan for damp conditions Tuesday and Wednesday, especially during late-day hours.
As rain clears Thursday, a crisp, dry air mass settles in. Halloween Friday looks mostly dry but breezy, with highs in the upper 40s and low 50s. The air will feel noticeably cooler under partly cloudy skies — a classic late-October setup. Parents should bundle kids in layers under costumes and plan for gusty winds around sunset.
Looking beyond the weekend, models hint at a colder trend taking hold into early November, with the first signs of frost and possible light flurries not far behind. Northern Indiana’s winter transition is coming — slow, steady, and just in time for November’s first chill.
