Boston weather in March 2026

Q: How warm is it in Boston in March?

Daytime temperatures usually reach 8°C in Boston in March, falling to -2°C at night.

Q: How sunny is it in Boston in March?

There are normally 7 hours of bright sunshine each day in Boston in March - that's 56% of daylight hours.

Q: Is the sea cold around Boston in March?

The average sea temperature around Boston in March is 3°C.

Q: Does it rain in Boston in March?

There are usually 11 days with some rain in Boston in March and the average monthly rainfall is 97mm.

Expect daytime maximum temperatures of 8°C in Boston, Massachusetts in March based on long-term weather averages. There are 7 hours of sunshine per day on average with 11 days with some rainfall and typically 97 mm of rainfall in the month.

8
8°C max day temperature
7
7 hours of sunshine per day
11
11 days with some rainfall
-2
-2°C min night temperature
12
12 hours of daylight per day
0
No heat & humidity
97
97 mm of monthly rainfall
4
4 (Moderate) UV index
3
3°C sea temperature

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The March weather guide for Massachusetts (Boston) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C / mm) | Imperial (°F / inches)