Chicago Weather: Frost Advisory

CHICAGO (CBS) -- There is one more cold night with frost before the warming trend begins.

Unseasonably cold air drifts into our region Monday night. Areas well north of us with freeze Warnings will drop into the 20s.

The Frost Advisory in the area begins at midnight and continues until 8 a.m. This advisory does not include the city of Chicago.

Widespread frost is expected north of I-88 and near the Wisconsin state line.

Lots of sun is expected Tuesday with highs near 60 inland and low 50s lakeside. The next shower or storm chance arrives after dark Wednesday and into the night.

The best chance for rain and thunder is Thursday.