Boston in December presents a city transitioning firmly into winter, offering a distinct shift from the vibrant hues of autumn. The air turns crisp and sharp, carrying a noticeable bite that signals the season’s arrival. This is the month where the city’s historic brick streets take on a quiet charm, dusted with the first potential of snow and illuminated by the early glow of holiday lights. Visitors and residents alike adjust their routines, embracing layers and seeking the warmth of fireplaces and bustling indoor venues.
Temperature and General Conditions
The average high temperature in Boston during December typically hovers around 41°F (5°C), while the average low drops to approximately 27°F (-3°C). However, these numbers are merely a baseline, as actual conditions can fluctuate significantly. Arctic blasts can send temperatures plummeting into the teens Fahrenheit (-10°C or lower), driven by persistent northwest winds. Conversely, unseasonably mild stretches can occur, pushing temperatures into the 50s°F (10-15°C) and creating an almost false sense of spring. December is inherently unpredictable, demanding flexibility in planning and wardrobe.
Precipitation and Snowfall
December is part of Boston’s core winter precipitation season, averaging between 9 to 11 inches of total precipitation for the month. A significant portion of this falls as snow, with an average accumulation of approximately 14 inches. Nor’easters, powerful coastal storms, are a primary concern during this time, capable of dumping substantial snowfall—sometimes exceeding two feet—in a single event. These systems often bring heavy rain initially before transitioning to snow as temperatures cling to the freezing point, creating messy and challenging conditions. Residents quickly learn to monitor weather forecasts with heightened attention throughout the month.
Nor’easters and Their Impact
Large, rotating storm systems that track up the Atlantic Coast.
Capable of producing hurricane-force winds and blinding snow squalls.
Often lead to coastal flooding, particularly during high tide.
Result in significant travel disruptions, including flight cancellations and treacherous road conditions.
Can cause power outages due to downed trees and utility lines.
Daylight and Sunshine Hours
Daylight in Boston during December is severely limited, marking the winter solstice period. The month begins with roughly 9 hours and 10 minutes of daylight, ending with only about 9 hours and 3 minutes. The sun rises late, around 7:15 AM, and sets early, near 4:15 PM, creating long stretches of twilight and darkness. This reduction in natural light contributes to the season’s introspective mood but also increases the importance of holiday lighting displays. Artificial illumination becomes essential for both safety and festive spirit during the extended evenings.
What to Wear and Pack
Navigating Boston in December requires a strategic approach to layering. The foundation should be thermal underwear or thick wool socks to retain body heat. Insulated, waterproof boots with high traction are non-negotiable, given the prevalence of icy sidewalks and hidden snow patches. A heavy winter coat, ideally windproof and water-resistant, is essential. Accessories are equally critical; insulated gloves, a warm hat that covers the ears, and a thick scarf are mandatory items. Without proper attire, the December chill can quickly turn a brief outdoor excursion into an uncomfortable experience.
Holiday Atmosphere and Events
Despite the cold, December in Boston is animated by a strong holiday presence. The city embraces the season with enthusiasm, visible in the elaborate light displays at locations like the Arnold Arboretum and the Boston Common. The Christmas markets in locations such as the Back Bay Fens and Copley Square offer festive treats and gifts, providing warmth and cheer. Indoor attractions, including world-class museums like the Museum of Fine Arts and the Isabella Stewart Gardner Museum, as well as performances at the Boston Symphony Hall, see a significant uptick in activity. The holiday season provides a vibrant counterpoint to the stark winter landscape.
