Boston Weather in December
United States · 30-year monthly averages
⚠️ Challenging time to visit
December in Boston is cold, with average daytime highs around 6°C (42°F) and nighttime lows near -1°C (29°F). Expect roughly 109mm of precipitation spread over about 9 rainy days, with a moderate amount of rain.
Avg high
6°C
42°F
Avg low
-1°C
29°F
Rainfall
109mm
moderate
Rainy days
9
days with ≥1mm
🎒 What to pack
- warm coat
- sweaters and layers
- scarf
December vs the rest of the year
FAQ
- How hot is Boston in December?
- December in Boston is cold, with average daytime highs around 6°C (42°F) and nighttime lows near -1°C (29°F). Expect roughly 109mm of precipitation spread over about 9 rainy days, with a moderate amount of rain.
- Does it rain a lot in Boston in December?
- Boston sees around 109mm of precipitation in December on average — moderate by global standards.
- Is December a good time to visit Boston?
- December is a challenging month to visit Boston weather-wise — plan around the conditions.