June weather forecast and climate
Boston, MA

A beautiful natural park with the George Washington Monument in Boston, Massachusetts
A beautiful natural park with the George Washington Monument in Boston, Massachusetts

Weather in June

The first month of the summer, June, is a moderately hot month in Boston, Massachusetts, with average temperature varying between 57.6°F (14.2°C) and 74.3°F (23.5°C).

Temperature

In Boston, the average high-temperature slightly increases, from an enjoyable 66.4°F (19.1°C) in May, to a moderately hot 74.3°F (23.5°C). The average low-temperature, in June, is 57.6°F (14.2°C).

Humidity

The average relative humidity in Boston is 74%.

Rainfall

In Boston, in June, it is raining for 13.6 days, with typically 2.13" (54mm) of accumulated precipitation. In Boston, during the entire year, the rain falls for 141.4 days and collects up to 27.2" (691mm) of precipitation.

Snowfall

June through September are months without snowfall.

Ocean temperature

In Boston, the average seawater 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

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

Sunshine

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 health hazard from the exposure to the Sun's UV rays for ordinary individuals.
Note: In June, the average maximum UV index of 6 translate into the following recommendations:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. 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. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the average humidity in June in Boston?

The average relative humidity in June in Boston, Massachusetts, is 74%.

How many days does it rain in June in Boston?

In Boston, Massachusetts, in June, it is raining for 13.6 days, with typically 2.13" (54mm) of accumulated precipitation.

When it does not snow in Boston?

June through September are months without snowfall in Boston.

Does it snow in Boston in June?

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

How cold is the water in June in Boston?

In June, the average ocean temperature in Boston is 58.5°F (14.7°C). Swimming in 58.5°F (14.7°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

When are the longest days in Boston?

The month with the longest days in Boston is June, with an average of 15.2h of daylight.

What is the average length of the day in June in Boston?

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

How long on average sun shines in June in Boston?

The average sunshine in June in Boston, Massachusetts, is 9.1h.

When is 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.

How high is the UV index in June in Boston?

In Boston, Massachusetts, the average daily maximum UV index in June is 6. A UV Index estimate of 6 to 7 represents a high hazard to health from the exposure to the Sun's UV radiation.

Average temperature in June
Boston, MA

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).

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Average pressure in June
Boston, MA

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).

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Average wind speed in June
Boston, MA

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).

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Average humidity in June
Boston, MA

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%).

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Average rainfall in June
Boston, MA

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).

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Average rainfall days in June
Boston, MA

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).

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Average snowfall in June
Boston, MA

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).

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Average snowfall days in June
Boston, MA

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).

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Average sea temperature in June
Boston, MA

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).

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Average daylight in June /
Average sunshine in June
Boston, MA

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).

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Average sunshine days in June
Boston, MA

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).

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Average UV index in June
Boston, MA

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).

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Average cloud cover in June
Boston, MA

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).

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Average visibility in June
Boston, MA

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).

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