Excessive Heat — Western Middlesex, Massachusetts

2025-06-22 to 2025-06-25 · Western Middlesex, Massachusetts

Event narrative

The nearest climate site in Boston (KBOS) reached 102F breaking the June high temperature record. Three prospective recruits at the Massachusetts Firefighting Academy in Stow were hospitalized on the morning of the 25th after falling ill due to the extreme temperatures.

Wider weather episode

Very hot and humid weather occurred in southern New England over the course of 4 days, peaking on Tuesday June 24th when heat index values reached 105 to 110. All four climate sites easily set daily records, and Providence and Boston set all time June high temperature records. There were reports of several dozen people treated for heat related illnesses, mostly at local beaches. Three recruits at the Massachusetts Firefighting Academy in Stow were hospitalized Wednesday morning after falling ill due to the extreme temperatures. Winds turning off the ocean finally broke the heat by June 26th.

Source: NOAA Storm Events Database, event_id 1256851. Narrative written by the NWS forecast office that issued the report.