Boston, Massachusetts – Thunderstorms will bring a sudden jolt to the heart of Boston this Sunday, July 20th, threatening summer plans and travel across the region. Storms and showers are likely after 2 p.m., with a severe weather risk for drivers on I-93, I-90, and local roadways as rain moves in.
According to the National Weather Service, showers and thunderstorms are expected to sweep into the Boston area Sunday afternoon and evening, creating a risk of localized flooding and slick roads. Downpours and possible lightning could disrupt outdoor activities, especially in Suffolk, Middlesex, and Norfolk counties, with storm chances increasing after 5 p.m.
Residents and visitors are urged to monitor weather alerts and avoid unnecessary travel during heavy rain. If you must be on the road, use headlights, reduce speed, and watch for pooling water. Secure outdoor furniture and charge mobile devices in advance in case of brief power outages.
While Monday will bring a return to sunshine and more comfortable temperatures, unsettled summer weather returns later in the week. Showers and thunderstorms are possible again Thursday and Friday, with the next round of muggy air.
Historically, July storms in Massachusetts can trigger rapid travel hazards and power interruptions. Stay weather-aware and check city updates if your plans take you outdoors or along key routes like I-93 or I-90.
Warnings remain in effect through Sunday evening, with updates possible as storms approach.
Boston, MA: Five-Day Weather Outlook (Starting Sunday, July 20th):
- Sunday: Showers and thunderstorms likely after 2 p.m.; high near 88°F. Storms possible through the evening.
- Monday: Sunny, pleasant, and cooler; high near 79°F.
- Tuesday: Mostly sunny and dry; high near 78°F.
- Wednesday: Sunny, with highs around 83°F.
- Thursday: Showers and thunderstorms possible; high near 87°F.
- Friday: Chance of showers, partly sunny; high near 90°F.
