Boston, Massachusetts – After a sweltering Tuesday that pushed heat index values past 107°F, relief arrives Wednesday across Massachusetts — but not without complications. Scattered thunderstorms are expected to move into the region by early afternoon, potentially disrupting travel and cooling temperatures by nearly 10 degrees.
According to the National Weather Service in Norton, an Extreme Heat Warning remains in effect until 8 p.m. Tuesday for Boston, Worcester, and most of central and eastern Massachusetts. Temperatures Tuesday will top out near 102°F, but humid conditions will make it feel closer to 110°F. Residents are urged to limit outdoor activities, stay hydrated, and check on neighbors, particularly older adults and those without air conditioning.
By Wednesday afternoon, isolated thunderstorms will begin developing around 1 p.m., especially near the I-95 and Route 128 corridors. Highs will fall to the low 90s with a 30% chance of rain in Boston, Lowell, and Brockton. While severe weather is not currently expected, brief downpours and gusty winds may cause delays or minor flooding in urban areas.
Thursday brings more organized rain chances with temperatures around 70°F — a sharp contrast from Tuesday’s extreme heat. The weekend will stay warm but unsettled, with intermittent showers through Saturday before sunshine returns Sunday.
🌤 Five-Day Forecast: Boston, MA
- Tuesday (Jun 24): Hot and humid, high 102°F. Heat index up to 110°F. Extreme Heat Warning through 8 p.m.
- Wednesday (Jun 25): Isolated storms after 1 p.m. High 91°F. Cooler and cloudy later.
- Thursday (Jun 26): Showers likely, high 70°F. Breezy with northeast wind.
- Friday (Jun 27): Partly sunny, chance of showers. High 79°F.
- Saturday (Jun 28): Scattered showers possible. High 80°F.
- Sunday (Jun 29): Mostly sunny, high 84°F. Drying out.
