National Weather Service United States Department of Commerce

Frost is expected tonight as temperatures inland settle in the low 30s, perhaps slightly cooler in low-lying colder spots. Lakeshore areas will likely hold in the upper 30s to lower 40s. Additional frost / freeze concerns return Sunday and Monday nights.
Fall will be in full swing into next week… which tracks, considering it IS October, after all. Nonetheless, frost and freeze concerns will intermittently carry into next week, with rain chances late Saturday through Sunday morning.