What was the hottest New Year's Day in Boston?

The hottest New Year's Day in Boston occurred on January 1, 2022, when temperatures reached an unseasonably warm 61 degrees Fahrenheit (16 degrees Celsius). This record-breaking warmth was part of a broader trend of unusually mild winter weather experienced in many parts of the northeastern United States. Such extremes highlight the variability of winter weather patterns and the impacts of climate change.