Monthly climate ·Boston weather in December
In December, Boston averages around 5° by day and -3° at night, with 10 rain days a month — about a 33% chance of rain on any given day.
By day
5°C
At night
-3°C
Daily rain chance
33%
Rain days a month
10
Monthly precipitation
115 mm
Sunshine hours a day
5.9
Average of 2016–2025 (Open-Meteo archive). Typical climate — not a forecast.
Is December a good time to visit Boston?
December is cold in Boston — around 5° by day and -3° at night on average. Pack warm clothing and keep plans flexible.
Every month in Boston
Frequently asked questions
- What is the weather in Boston in December?
- In December, temperatures in Boston average between -3° at night and 5° by day, with 10 rain days a month (average of 2016–2025).
- How much rain falls in Boston in December?
- Boston gets about 115 mm of rain in December on average, spread over roughly 10 rain days.
- Is December a good time to visit Boston?
- December is cold in Boston — around 5° by day and -3° at night on average. Pack warm clothing and keep plans flexible.