Boston Weather Alert: Timeline of Incoming Snow, Heavy Rain, and Wild Temperature Swings

Residents of Greater Boston woke up Sunday to the season’s first measurable flakes as a fast-moving clipper system spread light snow across eastern Massachusetts. According to the National Weather Service’s Boston office, Logan Airport recorded flurries before dawn with temperatures hovering near 32 °F, while suburbs south of the Mass Pike could pick up 1–2 inches by this evening. Snow intensity will remain light but persistent through midday before tapering off from west to east. Roads north of Route 2 should stay mainly wet, yet untreated secondary roads south of I-90 may become slick as readings slip into the upper 20s after sunset. Boston Public Works crews have pre-treated major arteries, but drivers are urged to reduce speed and allow extra braking distance. Colder air pours in behind the system tonight, dropping wind-chill values to the mid-teens downtown and single digits in the Merrimack Valley. Monday will be the coldest day of the young winter: forecasters expect highs of only 25 °F under bright but brisk skies, with northwest gusts up to 25 mph. The chill is short-lived. A moderating trend starts Tuesday, and by Thursday a surge of Atlantic warmth could push Boston’s thermometer into the mid-50s—roughly 15 degrees above normal for mid-December. The brief thaw also carries rain chances late week, which would erase lingering snowpack and potentially cause minor street flooding where storm drains are clogged with ice. Sports fans heading to Sunday’s Patriots-Bills matchup in Foxborough should bundle up and prepare for light snow during tailgating; kickoff temperatures near 30 °F will sink toward 25 °F by the final whistle. MBTA officials report normal commuter-rail schedules but caution that weather-related delays are possible on the Providence/Stoughton and Old Colony lines. Key takeaways for Boston weather today and the week ahead: • Light snow ends this afternoon; 0–2″ totals south of Boston. • Bitter wind chills tonight; Monday highs struggle to reach the mid-20s. • Gradual warm-up peaks Thursday in the 50s with rain showers. Stay updated with the latest Boston weather forecast, interactive radar, and real-time temperature maps to navigate fluctuating conditions safely.