CHICAGO (CBS) — The week has been sunny, clear and temperate so far, but all good things must come to an end.

The skies were dreary and perhaps even gothic as midday approached Thursday, with cloud cover prevailing across the Chicago area. The temperature as of 11:20 a.m. was a comfortable 73 at Gary and Valparaiso, Ind., and 75 at Kankakee, but only 70 at Midway International Airport, 67 at O’Hare, and a jacket-worthy 61 at Waukegan.

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The official high is 72, but the temperatures will be more or less stuck where they are, reports CBS 2 Meteorologist Megan Glaros. And while the clouds were just sitting there looking gloomy in the late morning, you’re going to be needing that umbrella later in the afternoon.

Glaros says the rain should be coming between 1 and 2 p.m., arriving in areas west of Chicago first. The northeast-southwest line of showers was over Green Bay, Wis., as of 11:20 a.m., and will be gone by the time the Bears take on the Green Bay Packers at Lambeau Field at 7:20 p.m.

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When the active weather hits Chicago, the showers are expected only to bring rain, and no storminess is expected. But a cold front is behind the showers, and it will cut the overnight low to an October-like 56 degrees.

But happier weather returns on Friday. Some clouds may remain in the early morning, but the sun returns with a high of 73 later in the day.

A beautiful weekend is also on tap, with the high Saturday expected to hit 75, and Sunday 76. The high for Monday is also 76, and Tuesday 70, but another cold front next week will cut the high to a mere 66 on Wednesday.

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