Current Weather and Forecast in Boston, MA
Massachusetts, United States 🇺🇸
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About the weather in Boston
Boston has a humid subtropical climate. July is the warmest month, with average highs of 83°, and January the coldest, when nights fall to around 23°. December brings the most rain, on about 11 days, while July is the sunniest, with 11.4 hours of sunshine a day. Over a whole year it rains on roughly 127 days.
Boston climate guide: monthly averages, seasons and the best time to visit
Common questions
What is the rainiest month in Boston?
December, at 4.7 inches (120 mm) over about 11 days. August is the driest month, at 2.9 inches (74 mm).
What is the hottest month in Boston?
July, averaging 83°F (28°C) by day and 66°F (19°C) overnight. The hottest single day in our 2015-2024 record for this location reached 101°F (39°C).
What is the best time to visit Boston?
The best time to visit Boston is generally August to October and May to June, when these are the warmest and brightest weeks of the year. Daytime temperatures in that window sit near 73°F (23°C), with rain on about 10 days a month. For the same question asked the other way round, see where else is warm in August.
How cold does Boston get in winter?
January nights average 23°F (-5°C). Frost and occasional ice are part of the season.
How much sun does Boston get?
8.5 hours a day averaged over the year, peaking in July at 11.4 hours.
What is the coldest month in Boston?
January, with highs of 37°F (3°C) and lows near 23°F (-5°C). The coldest day in the 2015-2024 record fell to -16°F (-26°C).
How hot does Boston get in summer?
July averages 83°F (28°C). Hot afternoons happen but extremes are not the norm.
Does it snow in Boston?
Yes - about 16 days a year carry measurable snowfall, concentrated December through April.