Boston (MA) Climate by Month
Since Boston is bordered by Boston Harbor and the Atlantic Ocean, its coastal climate tends to be more moderate than inland locations. That´s why Boston rarely experiences either extreme heat or cold. In the winter, the first freezing temperatures usually occur in early November, but the temperatures are modified considerably by the nearness of the relatively warm ocean. Cold weather usually fades out by early April, and Boston typically enjoys a spectacular, colorful spring with moderate temperatures. Although it can get quite warm in the summer, the hot afternoons frequently are tempered by the eastern sea breezes, as air flows inland from the cooler surfaces of the ocean.
Boston has no true dry season as it rains intermittently throughout the year. Much of the rainfall during the summer and early fall comes from showers and thunderstorms. The main snow season occurs from December through March.
The graphs below provide an overview of the climate in Boston (Massachusetts), the United States of America. They present long-term patterns and averages of weather conditions over a 30-year period.
Average day and night temperature
The mean minimum and maximum temperatures over the year.
Monthly hours of sunshine
The average monthly total hours of sunshine over the year
Daily percent of sunshine
The mean percent of hours of sunhours during the day over the year
Average water temperature
The mean water temperature over the year.
Monthly precipitation
The mean monthly precipitation over the year, including rain, snow, hail etc.
Monthly rainy days
The average number of days each month with rain, snow, hail etc.
Average humidity
The mean monthly relative humidity over the year
Average wind speed
The mean monthly wind speed over the year (in meters per second)
