Boston, Mass. – Summer swelter will grip Massachusetts as temperatures in Boston soar to 92°F on Wednesday, with a heat index near 97°F threatening outdoor plans and daily commutes. Residents should limit time outside, drink plenty of water, and use air conditioning if possible. Heat-sensitive groups, including children and older adults, need extra attention as Wednesday’s extreme heat moves in.
According to the National Weather Service, Wednesday will be the hottest day of the week for the Boston metro area, with mostly sunny skies and light south winds. While overnight relief is limited—lows stay near 77°F—residents can expect clouds to build by Wednesday night, signaling the arrival of scattered thunderstorms Thursday afternoon and evening.
City neighborhoods from Dorchester to East Boston will see the brunt of the heat, and MBTA riders should prepare for slower commutes as high temperatures strain transit systems. Hydrate frequently, never leave children or pets in vehicles, and check on neighbors without air conditioning. The Mass Pike (I-90) and I-93 corridors could experience delays as pavement temperatures climb.
By Thursday, clouds increase and highs dip to 88°F, but scattered thunderstorms are possible after 2 p.m., potentially leading to slick roads and brief power outages. Friday brings more comfortable highs near 83°F with only a slight chance of showers, offering some relief before another round of summer sun.
Warnings remain in effect through Thursday night, with additional weather advisories possible if storms intensify. Stay tuned for updates as conditions evolve.
Boston Five-Day Forecast: Wednesday, July 16th – Monday, July 21st
- Wednesday: Sunny and hot. High 92°F (Heat index 97°F). Light south winds.
- Thursday: Chance of thunderstorms after 2 p.m. Mostly cloudy. High 88°F. Storm risk continues into the night.
- Friday: Partly sunny, cooler. High 83°F. Slight chance of showers.
- Saturday: Mostly sunny. High 81°F. Breezy, comfortable summer weather.
- Sunday: Mostly sunny, highs around 83°F. Low chance of rain late.
- Monday: Mostly sunny, high 81°F. Dry start to next week.
Stay weather-aware, Boston—more summer weather alerts may follow as the weekend approaches.
