Boston Weather in December
5.2°C high · -4.3°C low · 100 mm rain · 2.2h sun
Dec is a cool month in Boston — not peak season, but a good time to avoid crowds.
December at a glance
| Metric | Value |
|---|---|
| Average high | 5.2°C |
| Average low | -4.3°C |
| Rainfall | 100 mm |
| Sunshine | 2.2 hours/day |
| Daylight | 8.9 hours |
What to pack in December
Pack a warm coat and layers, plus a raincoat and umbrella for Boston in December.
Boston weather by month
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Frequently asked questions
What is the weather in Boston in December?
Highs of 5.2°C and lows of -4.3°C, with about 100 mm of rain and 2.2 hours of sunshine per day.
Is December a good time to visit Boston?
Dec is a cool month in Boston — not peak season, but a good time to avoid crowds.
What to do in Boston · Best time to visit Boston
Climate data: Open-Meteo Historical (ERA5), 1991–2020. CC BY 4.0.