Weather
Boston, MA Weather Oct. 17–21: 30s Arrive After Friday Rain
Boston, MA A sharp weekend cooldown will bring temperatures into the 30s around Boston, Massachusetts, following a rainy Friday, with gusty winds Saturday giving way to sunshine and a gradual warming
By Audrey Sloan · 2026-10-14T08:55:13.525Z
Boston, MA A sharp weekend cooldown will bring temperatures into the 30s around Boston, Massachusetts, following a rainy Friday, with gusty winds Saturday giving way to sunshine and a gradual warming trend early next week.
According to the National Weather Service, Boston is expected to reach 65 degrees Friday before temperatures fall to just 49 degrees Saturday. Overnight lows could reach 36 degrees Saturday night, marking the coldest period in the supplied five day outlook.
The change follows widespread showers Friday, when precipitation chances reach 100%, before drier conditions return for the weekend.
Saturday Brings Gusty Winds and Colder Air Friday's rain could linger into the evening, with showers likely and a possible thunderstorm before 1 a.m. Saturday. Temperatures are expected to fall to around 43 degrees overnight.
By Saturday afternoon, sunshine will return, but temperatures will struggle to reach 50 degrees.
Northwest winds of 15 to 18 mph could gust as high as 33 mph, adding to the colder feel during outdoor activities.
The coldest temperatures are expected Saturday night, when mostly clear skies accompany lows around 36 degrees in Boston.
Although the city's forecast remains above freezing, the National Weather Service's New York office notes that frost can develop when temperatures fall into the mid 30s, particularly in rural areas.
That guidance does not establish a frost forecast for Boston. No official frost advisory or freeze warning was provided for the city.
Sunshine Returns as Temperatures Rebound Sunday will bring sunshine and slightly warmer conditions, with Boston reaching approximately 55 degrees.
The recovery will continue Monday as afternoon temperatures climb into the lower 60s, followed by another mostly sunny day Tuesday with highs in the mid 60s.
For Boston residents, the weekend's biggest changes will be Saturday's gusty winds and chilly overnight temperatures rather than additional precipitation.
The National Weather Service forecast indicates dry conditions from Saturday through Tuesday, offering several days of improving weather following Friday's showers.
Five Day Weather Outlook: Oct. 17–21 Temperatures below represent National Weather Service forecasts for Boston, Massachusetts. Wednesday's outlook was not included in the supplied forecast.
Saturday, Oct. 17: Mostly sunny, windy and much cooler. High near 49°. Northwest winds 15–18 mph, with gusts up to 33 mph. Mostly clear overnight, with a low around 36°. Sunday, Oct. 18: Sunny and slightly warmer, with a high near 55°. Mostly clear overnight, with a low around 42°. Monday, Oct. 19: Sunny, with a high near 62°. Partly cloudy overnight, with a low around 48°. Tuesday, Oct. 20: Mostly sunny and milder, with a high near 64°. Overnight temperatures were not provided.