June weather forecast and climate
Boston, MA

A beautiful natural park with the George Washington Monument in Boston, Massachusetts, with a sneak view of the city skyscrapers
A beautiful natural park with the George Washington Monument in Boston, Massachusetts, with a sneak view of the city skyscrapers
The first month of the summer, June, is a warm month in Boston, Massachusetts, with average temperature varying between 74.3°F (23.5°C) and 57.6°F (14.2°C).

Temperature

In June, the average high-temperature marginally rises, from an enjoyable 66.4°F (19.1°C) in May, to a warm 74.3°F (23.5°C). In June, in Boston, the average low-temperature is 57.6°F (14.2°C).

Humidity

The average relative humidity in Boston is 74%.

Rainfall

In Boston, it is raining for 13.6 days, with typically 2.13" (54mm) of accumulated precipitation. Throughout the year, there are 141.4 rainfall days, and 27.2" (691mm) of precipitation is accumulated.

Snowfall

In Boston snow does not fall in June through September.

Ocean temperature

In Boston, in June, the average water temperature is 58.5°F (14.7°C).
Note: Swimming in 58.5°F (14.7°C) is considered life-threatening. Even a few minutes in 55.4°F (13°C) water is uncomfortable, and swimming below 50°F (10°C) may cause total loss of breathing control and cold shock, depending on a person's physique.

Daylight

June has the longest days of the year in Boston, with an average of 15.2h of daylight.

Sunshine

In Boston, the average sunshine in June is 9.1h.

UV index

Months with the highest UV index in Boston are June through August, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high threat to health from the exposure to the Sun's UV rays for the average person.
Note: In June, the average maximum UV index of 6 translate into the following recommendations:
Take precautions and utilize sun safety practices. Protection against the skin and eye damage is required. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.

What is the temperature in June in Boston?

In Boston, Massachusetts, in June, the average high-temperature is 74.3°F (23.5°C), and the average low-temperature is 57.6°F (14.2°C).

What is the average humidity in June in Boston?

The average relative humidity in June is 74%.

How much does it rain in Boston in June?

In Boston, Massachusetts, during June, the rain falls for 13.6 days and regularly aggregates up to 2.13" (54mm) of precipitation.

Does it snow in Boston in June?

In June, in Boston, it doesn't snow. May is the latest month when it typically snows.

When it does not snow in Boston?

June through September are months without snowfall in Boston, Massachusetts.

What is the water temperature in June in Boston?

In Boston, Massachusetts, the average seawater temperature in June is 58.5°F (14.7°C). Swimming in 58.5°F (14.7°C) is considered life-threatening. Even a few minutes in 55.4°F (13°C) water is uncomfortable, and swimming below 50°F (10°C) may cause total loss of breathing control and cold shock, depending on a person's physique.

When are the longest days in Boston?

With an average of 15.2h of daylight, June has the longest days of the year in Boston.

How many hours of daylight does Boston have in June?

The average length of the day in June in Boston is 15.2h.

How many hours of sunshine does Boston have in June?

In Boston, the average sunshine in June is 9.1h.

What is the month with the highest UV index in Boston?

June through August, with an average maximum UV index of 6, are months with the highest UV index in Boston, Massachusetts.

How high is the UV index in June in Boston?

In June, the average daily maximum UV index is 6. A UV Index of 6 to 7 symbolizes a high health threat from the exposure to the Sun's UV radiation.
Average temperature in June - Boston, MA
  • Average high temperature in June: 23.5°C

The warmest month (with the highest average high temperature) is July (27.6°C).
The month with the lowest average high temperature is January (1.2°C).

  • Average low temperature in June: 14.2°C

The month with the highest average low temperature is July (18.3°C).
The coldest month (with the lowest average low temperature) is January (-5.2°C).

Average pressure in June - Boston, MA
  • Average pressure in June: 1013.4mbar

The month with the highest atmospheric pressure is November (1018.1mbar).
The month with the lowest atmospheric pressure is June (1013.4mbar).

Average wind speed in June - Boston, MA
  • Average wind speed in June: 10.9km/h

The windiest month (with the highest average wind speed) is January (15.9km/h).
The calmest month (with the lowest average wind speed) is August (9.9km/h).

Average humidity in June - Boston, MA
  • Average humidity in June: 74%

The month with the highest relative humidity is February (77%).
The month with the lowest relative humidity is April (69%).

Average rainfall in June - Boston, MA
  • Average rainfall in June: 54mm

The wettest months (with the highest rainfall) are March, April and December (74mm).
The driest month (with the least rainfall) is September (32mm).

Average rainfall days in June - Boston, MA
  • Average rainfall days in June: 13.6 days

The month with the highest number of rainy days is May (15.3 days).
The month with the least rainy days is January (7.9 days).

Average snowfall in June - Boston, MA
  • Average snowfall in June: 0mm

The month with the highest snowfall is February (120mm).
Months with the least snowfall are June, July, August and September (0mm).

Average snowfall days in June - Boston, MA
  • Average snowfall days in June: 0 days

Months with the highest number of snowfall days are January and February (7.6 days).
Months with the least snowfall days are June, July, August and September (0 days).

Average sea temperature in June - Boston, MA
  • Average sea temperature in June: 14.7°C

The best month for swimming (with the highest average sea temperature) is August (20°C).
The coldest month (with the lowest average sea temperature) is February (3.4°C).

Average daylight in June / Average sunshine in June - Boston, MA
  • Average daylight in June: 15.2h

The month with the longest days is June (Average daylight: 15.2h).
The month with the shortest days is December (Average daylight: 9.1h).

  • Average sunshine in June: 9.1h

The month with the most sunshine is August (Average sunshine: 10.5h).
The month with the least sunshine is February (Average sunshine: 4.6h).

Average sunshine days in June - Boston, MA
  • Average sunshine days in June: 14.8 days

The month with the most sunshine days is September (17.7 days).
The month with the least sunshine days is April (13 days).

Average UV index in June - Boston, MA
  • Average UV index in June: 6

Months with the highest UV index are June, July and August (UV index 6).
Months with the lowest UV index are January, February, March, November and December (UV index 2).

Average cloud cover in June - Boston, MA
  • Average cloud cover in June: 41

The month with the most cloud cover is March (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 32).

Average visibility in June - Boston, MA
  • Average visibility in June: 9km

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).