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Boston weather in May

Long-run climate averages for Boston, MA in May, plus what the forecast models say for the days ahead.

May at a glance

In May, Boston averages 68°F by day and 49°F at night. The wettest month is usually January.

May in Boston averages a daytime high of 68°F and an overnight low of 49°F, which reads as mild for this part of the world. Across the whole year Boston sees roughly 51 inches of precipitation.

Climate averages tell you what to pack. They do not tell you what next Tuesday looks like — for that, see the live Boston forecast with every model compared and how much they currently agree.

Boston weather by month

what to expect in Boston through the year

Here is Boston's typical weather in each month: the average daytime high and overnight low in °F, how each month feels, and the wettest month marked. Use it to plan any trip to Boston by season.

Jan
40°
27°
Cool
Wettest
Feb
42°
25°
Cool
Mar
47°
32°
Cool
Apr
57°
40°
Cool
May
68°
49°
Mild
Jun
77°
59°
Warm
Jul
84°
68°
Warm
Aug
79°
63°
Warm
Sep
73°
58°
Warm
Oct
64°
48°
Mild
Nov
51°
36°
Cool
Dec
43°
30°
Cool

Common questions

How warm is Boston in May?
Boston averages a daytime high of 68°F in May, with overnight lows around 49°F. These are long-run climate averages, not a forecast — for the actual days ahead see the live model comparison.
Is May a good time to visit Boston?
The most comfortable time to visit Boston is usually May, June, September and October, when daytime highs sit in the pleasant 60-78°F range and the heaviest January rain is behind you.
Does it rain a lot in Boston in May?
The wettest month in Boston is usually January. Across the year the city sees roughly 51 inches of precipitation.

Boston in other months

JanuaryFebruaryMarchAprilJuneJulyAugustSeptemberOctoberNovemberDecember

More about Boston

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