Overview

• Rain advances west to east late tonight, starting around 10–11 p.m. in northern and western areas and closer to dawn near Boston and points south.
• Most locations are forecast to receive roughly 0.5 to 1 inch of rain, with isolated totals up to 1.5 inches.
• The wettest window is Wednesday morning, with rain lingering into the late afternoon on Cape Cod and the Islands and a dry evening commute for most.
• Temperatures drop sharply from near 80 today to the 60s Wednesday and the 50s Thursday, with 30s at night and a frost risk by Friday morning in some suburbs.
• A drier stretch is favored into the holiday weekend, though forecasters note a low chance of a late-weekend coastal storm, and Tropical Storm Jerry poses no U.S. threat.