Despite ample sunshine, temperatures on Sunday should climb only into the lower and middle 50s making this the city’s chilliest Mother’s Day since 2002 when the high reached just 50 degrees. With clearing skies and light winds expected Sunday night, temperatures are expected to approach the record low of 34 degrees Monday morning with frost possible in areas away from the lake.
The National Weather Service has posted a Frost Advisory for most of the Chicago area from 1 a.m. until 7 a.m. Monday morning. The core of a somewhat unseasonably cool Canadian air mass will settle in over northern Illinois and northern Indiana tonight resulting in a higher probability of frost than we experienced this morning.
Warmer air approaches Monday as temperatures rebound into the lower 60s, but arrives in earnest Tuesday and Wednesday as temperatures surge to the highest levels of the year reaching the upper 80s Tuesday and approaching 90 on Wednesday.
Some thunderstorms could develop Monday night, but the best chances for precipitation arrive ahead of a cold front late Wednesday or Wednesday night.
For more updates, log on to Chicago Weather Center.