By Mary Kay Kleist

CHICAGO (CBS) — A picture-perfect day is expected for the rest of the afternoon, with full sunshine, low humidity and comfortable highs in the 80s.

CBS 2 Meteorologist Mary Kay Kleist reports at 11:20 a.m., it was only 78 degrees at O’Hare and Midway international airports and 79 at the lakefront – temperatures lower than the overnight lows throughout many recent weeks.

Humidity was only 45 percent, and winds were calm from the south at 8 mph.

The high for the day is 85 degrees, and when the White Sox throw out their first pitch at 7:10 p.m., it will be a pleasant 80. The sun goes down at 8:03 p.m., and the low drops to an almost fall-like 66.

The sunshine might not make it all the way through Tuesday. A cold front is expected to sag down from the north, while a low-pressure system is expected to approach from the west – bringing moisture and a slight chance of thunderstorms.

The high for Tuesday is 90 degrees, but the relatively low humidity will make it tolerable. The high for Wednesday is 84, Thursday 82, Friday just 78, Saturday 79 and Sunday 80.

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