PM Update: Clouds departing, mostly sunny weekend inbound It took its sweet time, but this morning's stubborn cloud deck eventually broke apart this afternoon. Temperatures responded by popping into the low-to-mid 70s. Clouds continue to decrease tonight setting up a sunny, but slightly cooler weekend behind today's front. Through Tonight: Partly cloudy skies this evening gradually become clear. Lows are seasonably cool, from the low 40s in the north and west suburbs to near 50 downtown. The weekend: Both Saturday and Sunday are mostly sunny and beautiful, with highs in the mid-to-upper 60s. Saturday night is mostly clear, with lows from the mid-30s in the colder suburbs to the mid-40s downtown. Winds are generally light from the northwest, at 6-13 mph during the day and calm to 5 mph at night.