Boston Weather Update - August 25, 2025

DATELINE BOSTON, Aug. 25, 2025 - Today’s weather in Boston began with high humidity and extensive cloud cover, giving way to breaks of sunshine by midday. Spotty thunderstorms developed across the region in the afternoon, before clearing skies returned overnight.

Temperatures peaked at 76°F under humid conditions and dipped to a low of 61°F after sunset. The chance of a thunderstorm this afternoon reached 40%, with skies clearing to mostly clear overnight.

Air Quality Advisory An elevated level of airborne pollutants prompted an Air Quality Advisory across the metropolitan area. Sensitive groups-including those with respiratory conditions-are advised to limit prolonged outdoor exertion until particle counts decrease.

Outlook Tomorrow will be less humid, with abundant sunshine and highs near 78°F. Overnight lows will fall into the upper 50s under clear skies, offering a pleasant start to midweek.