Duluth, Minn. – Northern Minnesota residents should prepare for chilly overnights as isolated frost remains possible through Friday morning, despite a stretch of sunny, warm days.
According to the National Weather Service in Duluth, temperatures will climb into the upper 60s and 70s during the day, but may dip into the 30s overnight—especially inland from Lake Superior. The risk of frost is highest in low-lying rural areas each night this week, with Wednesday and Thursday morning expected to be the coldest.
Lake breezes are forecast to push further inland midweek, keeping shoreline communities like Duluth, Two Harbors, and Grand Marais cooler than surrounding towns. Highs near the lake may top out around 55 to 65 degrees, while areas farther inland could reach the upper 70s by Friday.
Gardeners are urged to cover sensitive plants overnight, and drivers should be aware of patchy frost in valleys and shaded areas during early morning commutes. Though no major weather systems are expected, the sharp day-to-night temperature swing could impact agriculture and outdoor plans.
Dry conditions will persist through Friday, with the next chance of changes expected over the weekend. Frost advisories may be issued nightly, especially in St. Louis, Lake, and Cook counties.
