By CBS 2 Chicago Staff

CHICAGO (CBS) — The coldest air of season so far has arrived for the Chicago area, and the first snow might not be far behind. This upcoming week will be the coldest we have seen in seven months.

Temperatures reached the upper 40s on Saturday afternoon, with mostly clear skies. Temperatures will drop to the upper 30s overnight, turning mostly cloudy.

Sunday will remain cloudy and cold, with highs in the upper 40s, and light rain possible mainly late, and a mix of snow possible Sunday night into early Monday.

Minor accumulations are possible, mainly west of the city.

There are also chances for rain on Tuesday and Thursday. Highs for the week will range from 10°-15° below average.

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