Boston, Massachusetts – Searing summer heat is set to return to Boston, with patchy fog giving way to sunshine and a high near 80°F on Sunday, July 13th. By Tuesday, temperatures will soar above 90°F, pushing heat safety to the forefront for residents and travelers. Local impacts will be felt across Boston and major routes including I-90 and Route 1A, especially as the work week begins.
According to the National Weather Service at Logan International Airport, Sunday will start with patchy fog before skies clear, bringing mostly sunny conditions and a calm southeast breeze. Residents should plan for reduced visibility early in the morning, then enjoy milder, less humid conditions through midday. Light winds will make outdoor plans pleasant, but the break from extreme heat will be short-lived.
Monday brings mostly cloudy skies and a 30% chance of afternoon showers and thunderstorms, especially after 2 p.m. Evening commuters on I-93 and Route 128 should stay alert for slick roads and brief downpours. Temperatures jump to 86°F, with thunderstorm chances lingering into Monday night.
The true summer sizzle arrives Tuesday and Wednesday as highs spike to 91°F and 92°F, with mostly sunny skies. Heat illness risks climb, especially for outdoor workers and the elderly. Stay hydrated, limit strenuous activity, and check on neighbors as humidity returns.
By Thursday, another round of showers and thunderstorms is possible, but heat remains intense.
Warnings for heat and pop-up storms will remain in effect into midweek—watch for updates from local officials and the NWS.
Five-Day Boston, MA Weather Forecast – SUNDAY, JULY 13TH to THURSDAY, JULY 17TH
- Sunday: Patchy fog early, then mostly sunny. High: 80°F.
- Monday: Mostly cloudy. Chance of showers and thunderstorms after 2 p.m. High: 86°F.
- Tuesday: Hot, mostly sunny. High: 91°F.
- Wednesday: Mostly sunny and hot. High: 92°F.
- Thursday: Partly sunny, chance of showers and thunderstorms. High: 91°F.
