NOW: Chilly and clear overnight with lows in the 50s. 

NEXT: Sunday and Monday bring back some summer heat, with humidity rising into Monday and highs in the mid-80s.

Storm Watch Meteorologist Darryl Green says Tropical Storm Fiona is expected to bring heavy rain with possible life-threatening flooding to Puerto Rico and Virgin Islands through Saturday, Sunday, and parts of Monday.

Tonight: Chilly and clear, lows around the mid-50s.

Friday: Sunny and warm, highs from the mid- to upper-70s.

Saturday: Mostly sunny, warm and turning humid, highs from the upper-70s to the low-80s.

Sunday: Mostly sunny, warm and humid, highs from the mid to upper 80s.

Monday: Partly sunny, slight chance of showers, highs around the mid-80s.

Tuesday: Partly to mostly sunny, slight chance of showers, highs from the low- to mid-80s.