Boston Weather in June

June sees the beginning of hot weather in Boston, Massachusetts. Yet the city's sea breezes help spare most afternoons from excessive heat. The summer weather also brings an increase in thunderstorm activity.

This page gives detailed information on the typical June weather for Boston.

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The numbers here are historical averages based on climate data gathered at Boston's Logan International Airport, located on the waterfront next to Boston Harbor.

Temperature Weather iconTemperature

76 °F June average high 24 °C
60 °F June average low 15 °C

In most years, Boston averages a daily maximum temperature for June that's between 73 and 79 degrees Fahrenheit (23 to 26 degrees Celsius). The minimum temperature usually falls between 58 and 61 °F (14 to 16 °C).

The days at Boston continue to warm quickly during June. By the end of the month, the temperature has climbed over 9 °F (5 °C) above what it was at the start.

11 days 80 °F max. or more (27 °C)
17 days 60 °F min. or less (16 °C)

Nearly every day in June warms to over 60 °F (16 °C) in Boston. The city averages 2 days this month when the thermometer reaches into the 90s °F (over 32 °C), the first 90-degree weather of the year. Temperatures above 100 °F (38 °C) are not expected here during June.

At night, the thermometer dips to 50 °F (10 °C) or below just once this month. June does not normally get as cold as 40 °F (4 °C).

Rainy Weather iconRain

3.7 in total precipitation 93 mm
11 days of rain

June is the most variable month of the year for the amount of rainfall Boston receives. Half the time, it rains 1 to 5 inches (37 to 119 mm) in June. One in four years has drier weather, while another one in four is wetter. None of the precipitation falls as snow.

Sunny Weather iconSun

63 % sunshine
7 days clear skies

The sun's rays reach the ground in Boston during 63 percent of daylight hours on average in June, for a total of 287 hours in the month. Typically on 7 days this month the sky is mainly clear, with at most 30 percent cloud cover.

Sunlight in June at Boston lasts for 15 hours and 13 minutes a day on average. The longest days of the year, from around June 18th to 23rd, last 15 hours and 17 minutes from sunrise to sunset.

Humid Weather iconHumidity

69 % June average humidity

The relative humidity in Boston during June usually peaks at 80 percent in the morning then drops to 58 percent by early afternoon.

Local Time1 am4 am7 am10 am1 pm4 pm7 pm10 pm
Humidity % 77 80 73 62 58 59 66 73

Windy Weather iconWind

11.2 mph June wind speed average 18.0 kph

Boston's sea breeze usually keeps afternoon temperatures from getting overly hot in areas near the coast.

Stormy Weather iconStorms

2 days rainfall of 0.5 inches (13 mm) or more
4 days with thunderstorms in June
2 % chance a named storm approaches

While there's a two percent probability that a named tropical storm will approach within 100 miles (165 km) of Boston during June, it's unlikely that any storm in the area will be as severe as a hurricane.


These weather data are long-term historical averages provided by the National Climatic Data Center of the United States. The temperature and precipitation numbers are 1981-2010 normals while the humidity and thunderstorm statistics are 1961-1990 normals. The named storm probabilities come from the Atlantic Oceanographic and Meteorological Laboratory, Hurricane Research Division.

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