Weather
Massachusetts Weather: 32° Frost Risk, Clocks Fall Back Sunday Nov 1
Boston, MA – Greater Boston residents face a sharp temperature swing this week, with patchy frost possible early Wednesday as temperatures fall near freezing before a warmup pushes highs into the 70s
By Avery Collins · 2026-10-26T08:22:09.771Z
Boston, MA – Greater Boston residents face a sharp temperature swing this week, with patchy frost possible early Wednesday as temperatures fall near freezing before a warmup pushes highs into the 70s Friday. The changing conditions arrive ahead of Halloween weekend and the end of daylight saving time Sunday, November 1.
According to the National Weather Service forecast for Chestnut Hill, Massachusetts, Tuesday night temperatures could fall to approximately 32 degrees, allowing patchy frost to develop after 1 a.m. Wednesday. The forecast then calls for temperatures to rebound, potentially reaching 72 degrees Friday.
Monday, October 26, begins with sunshine and a high near 69 degrees. West winds of 6 to 8 mph are expected before mostly cloudy skies develop Monday night, when temperatures fall toward 43 degrees.
Tuesday brings noticeably cooler conditions, with sunny skies but afternoon temperatures reaching only 55 degrees. North winds of 6 to 8 mph are expected before skies clear overnight.
The coldest conditions arrive Tuesday night into Wednesday morning, when temperatures could reach freezing in Chestnut Hill. Patchy frost may affect exposed vegetation, particularly in colder neighborhoods and sheltered locations.
Wednesday afternoon brings sunshine after widespread frost is possible before 8 a.m., with temperatures recovering to around 58 degrees. Thursday warms further, reaching approximately 66 degrees under sunny skies.
Friday, October 30, could become the warmest day of the week, with sunshine and highs near 72 degrees.
Halloween arrives Saturday, October 31, with mostly sunny skies and temperatures around 62 degrees. Overnight lows near 47 degrees should provide considerably milder conditions than Wednesday morning's freezing temperatures.
Sunday, November 1, brings mostly sunny skies and a high near 65 degrees as daylight saving time ends.
At 2 a.m. Sunday, clocks move backward one hour to 1 a.m. as Massachusetts returns to Eastern Standard Time. Most smartphones adjust automatically, although traditional clocks and household appliances may require manual changes.
Sunrise and sunset will occur approximately one hour earlier by the clock, bringing darker evenings across Greater Boston.
For now, residents should prepare for Tuesday night's freezing temperatures before enjoying a warmer Friday and relatively comfortable Halloween weekend.
Boston Five Day Weather Forecast Monday, October 26: Sunny, with a high near 69°F. West winds 6 8 mph. Mostly cloudy Monday night, with a low around 43°F and north winds 7 9 mph.
Tuesday, October 27: Sunny and cooler, with a high near 55°F. North winds 6 8 mph. Clear Tuesday night, with a low around 32°F and patchy frost developing after 1 a.m.
Wednesday, October 28: Widespread frost possible before 8 a.m., followed by sunshine and a high near 58°F. Mostly clear Wednesday night, with a low around 42°F.
Thursday, October 29: Sunny, with a high near 66°F. Southwest winds 7 10 mph, gusting to 20 mph. Mostly clear Thursday night, with a low around 50°F.
Friday, October 30: Sunny, with a high near 72°F. West winds 7 9 mph. Mostly clear Friday night, with a low around 47°F.
Saturday, October 31 — Halloween: Mostly sunny, with a high near 62°F. Northwest winds 3 6 mph. Partly cloudy Saturday night, with a low around 47°F.
Sunday, November 1 — Daylight Saving Time Ends: Mostly sunny, with a high near 65°F. Southwest winds 6 9 mph. Clocks move backward one hour at 2 a.m. local time, returning to 1 a.m. as Eastern Standard Time begins. Greater Boston residents gain an extra hour overnight, while sunset occurs approximately one hour earlier by the clock.
November 2 8 NOAA Extended Outlook NOAA's Climate Prediction Center favors above normal temperatures across Boston and much of eastern Massachusetts during November 2 8, suggesting temperatures could remain relatively mild as the region enters the first full week of November.
Above normal precipitation is also favored across much of Massachusetts, although the outlook does not establish specific rainfall totals, daily precipitation chances or the timing of individual weather systems.
The agency's separate November 2 8 hazard outlooks identify slight risks of high winds, heavy precipitation and heavy mountain snow primarily across portions of the western and central United States. Boston is not included in those highlighted slight risk areas.
Although freezing temperatures and frost are possible early Wednesday, the supplied NOAA guidance does not establish a significant winter storm, accumulating snowfall or damaging wind event affecting Greater Boston during November 2 8.
Residents should continue monitoring updated National Weather Service forecasts, particularly regarding Tuesday night's freezing temperatures, Wednesday morning's frost potential and any changes heading into early November.