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yesterday

Prolonged Heat Wave Set to Grip Boston as Heat Index Nears 100°F

A shift to offshore winds will push coastal temperatures into the mid-80s by Sunday, ushering in a stretch of low-90s highs next week with minimal thunderstorm relief

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Overview

  • Coastal and inland highs remain steady today and tomorrow, ranging from the 70s at the water’s edge to the low and mid-80s elsewhere.
  • Humidity levels will climb gradually through Sunday, marking a return of sticky air by early next week.
  • Daytime temperatures are forecast to stay in the low-90s from Monday through Thursday.
  • The heat index is expected to peak near 100°F on Wednesday, creating heightened risks for heat-related illness.
  • Only isolated thunderstorms are expected Wednesday and Thursday as a weakening cold front passes over soils still nearly 3.5 inches below normal precipitation since June.