Boston, MA – A summer weather alert is in effect as rain and thunderstorms threaten Boston on Sunday, July 27th, ahead of a sharp midweek heat surge. Residents should expect downpours and possible thunder during the afternoon, making travel along I-93 and local routes slower and potentially hazardous. Stay weather-aware, delay unnecessary trips, and monitor changing conditions.
According to the National Weather Service, showers are likely before 2 p.m., with thunderstorms possible between 2 p.m. and 5 p.m. Sunday’s high will be 79°F, but heavy rainfall could lead to ponding on streets, especially in low-lying neighborhoods. Any outdoor plans should include a backup, and it’s wise to secure loose items that could blow around in gusty winds.
Monday, July 28th, brings a break from the rain with abundant sunshine and a high near 88°F. But the real heat arrives Tuesday, July 29th, as highs soar to 95°F—Boston’s hottest day of the week. Stay hydrated, check on vulnerable neighbors, and never leave children or pets in parked vehicles. Heat safety will be critical.
The pattern shifts again midweek. A slight chance of showers returns Wednesday, July 30th, before another round of partly sunny, pleasant weather settles in for Thursday, July 31st. Cooler air is expected by Friday.
Five-Day Boston Forecast:
- Sunday, July 27th: Showers likely, thunderstorms in the afternoon. High: 79°F / Low: 67°F
- Monday, July 28th: Sunny, warm, dry. High: 88°F / Low: 71°F
- Tuesday, July 29th: Hot, mostly sunny. High: 95°F / Low: 72°F
- Wednesday, July 30th: Mostly sunny, slight chance of afternoon showers. High: 88°F / Low: 69°F
- Thursday, July 31st: Chance of showers, partly sunny. High: 83°F / Low: 63°F




