Cool Overnight; Humidity and Extreme Heat Arrive Friday

Overnight: Mostly cloudy with a few showers, patchy fog and drizzle. Temperatures hold in the 60s. Friday: Sun and clouds, humidity builds back up, high in the 80s to near 90. Saturday: Mostly sunny, hot and humid, highs 95-100. Cape Cod Overnight: Showers, fog and drizzle. Low in the 60s. Friday: Becoming partly sunny, high in the 80s. Saturday: Mostly sunny, hot and humid, highs near 90.