Duluth, Minn. – A chilly end to August is signaling an early start to frost season across northern Minnesota, with overnight lows already dipping into the 30s in several communities. Residents from Hibbing to International Falls could see patchy frost in low-lying areas this week, with the greatest freeze potential expected by Thursday night.
According to the National Weather Service in Duluth, International Falls has already bottomed out at 36°F, while Ashland dropped to 35°F on Friday morning. These values are not unusual for late August, though the average first freeze for many Northland locations does not arrive until mid to late September. The agency says a 5–20% risk of freezing conditions exists through next week.
Drivers in rural valleys and near lakeshores may encounter early morning frost on windshields, while gardeners are urged to cover late-summer plants or bring containers inside. NWS officials noted that clear skies and light winds increase the likelihood of overnight frost, especially in areas away from the urban core of Duluth.
Temperatures are expected to remain cool into early September, with additional frost advisories possible. Residents are encouraged to monitor local forecasts as the freeze risk grows through midweek.
