Massachusetts, 2025

Excessive Heat in Massachusetts, June 22 to 25, 2025

June 22 to 25, 2025 · NWS BOX · 1 event in 1 county or zone

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.

Where it happened

Every event with a place to put it; 1 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.

  • Tornadoes
  • Tropical storms and surge
  • Floods
  • Wind
  • Hail
  • Winter weather
  • Heat and drought
  • Cold
  • Fire, smoke and dust
  • Marine and coastal
  • Other

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The toll

Deaths
0
Injuries
3
Property damage
None recorded
Crop damage
None recorded
Events
1

Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.

What happened

The episode as NWS BOX wrote it up.

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.

The radar

The national radar mosaic for the moment the first event began.

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Event by event

1 excessive heat. Local standard time, as filed.

Excessive Heat, Western Middlesex

When
June 22, 12:00 PM EST to June 25, 6:00 PM EST
Where
Western Middlesex forecast zone
Injuries
3 direct, 0 indirect
Reported by
Broadcast Media
Coordinates
42.486, -71.392 (the zone’s center; the record gives no point)

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.

What these are

Excessive Heat
Heat at or above the local excessive heat warning criteria, or heat that caused deaths.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

More

Every storm in Massachusetts in 2025Every state in 2025This day in weather historyWarnings in Massachusetts, June 2025

Sources

NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 1256851.