Today: Sunny to partly cloudy in the morning, but clouds will increase through the day with scattered showers and isolated thunderstorms developing late afternoon and evening in about 30 to 50 percent of the area. Becoming windy and unseasonably warm with afternoon temperatures between 77 to 81. Wind: SSW 10 to 20 with gusts to 25 mph.
Tonight: Any lingering showers end early, then cloudy, breezy and cooler overnight as temps fall into the low and mid 50s. SW winds shift NW to N between 10 to 20 mph.
Friday: Cloudy, windy and considerably cooler with periodic light lake effect showers along the south shore and in NW Indiana. Highs in the upper 50s lakefront to low 60s inland. Wind: N 10 to 20 with gusts to 30 mph.
Saturday: Partly to mostly sunny and cool in the morning. Mostly sunny and milder in the afternoon with seasonable temps in the mid 60s. Light and variable winds increase late in the day.
Sunday: Mostly clear and breezy early in the morning with temps in the mid 50s for the start of the Chicago Marathon then rising through the 60s during the morning. Mostly sunny, windy and warmer in the afternoon as temps reach the mid to upper 70s. Wind: SSW 15 to 25 mph.
Monday: Mostly sunny, breezy and slighty cooler, but still mild with highs in the low to mid 70s.
Tuesday: Mostly sunny, breezy and even a little cooler with highs in the upper 60s.
Wednesday: Mostly sunny, breezy and pleasant. Highs in the upper 60s.