CHICAGO (CBS) — Conditions will remain unseasonably cool and befitting of early fall for the rest of the day Tuesday, but look for all that to change as the week goes on.

CBS 2 Meteorologist says as of 11:20 a.m. Tuesday, it was 73 degrees at O’Hare International Airport, 74 at the lake and Midway International Airport, and 75 at Waukegan. The high for the day is expected to hit 78, with light winds and sunny skies brought about by a low pressure system situated over northwest Illinois.

Overnight, the low drops to 57 degrees under clear skies. But on Wednesday, the high-pressure system slides east and opens up the Chicago area to hot air flow from the south.

The warm front will drive the high up to 82 on Wednesday, and 87 on Thursday. Some outlying suburban areas could even flirt with 90.

The high for Friday is 86, and for Saturday 85. A storm system moves in on Sunday, and a rain chance persists from Sunday into Monday – when the high is forecast at 84 and 83, respectively.


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