June weather forecast
Boston, MA

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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

For Boston, June marks the onset of summer. The weather becomes warmer than that witnessed in May, and temperatures continue to climb. The city experiences a high of 74.3°F (23.5°C) and a low of 57.6°F (14.2°C). The extended daylight hours cater to evening gatherings, park outings, and barbecues. June is also a popular time for tourists due to the numerous summer events and festivals that take place.

Temperature

As Boston welcomes June, the average high-temperature displays a subtle shift, adjusting from an enjoyable 66.4°F (19.1°C) in May to a moderately hot 74.3°F (23.5°C). In June, Boston's temperature tends to fall to an average low of 57.6°F (14.2°C) during the night.

Humidity

In Boston, the average relative humidity in June is 74%.

Rainfall

In Boston, Massachusetts, during June, the rain falls for 13.6 days and regularly aggregates up to 2.13" (54mm) of precipitation. In Boston, during the entire year, the rain falls for 141.4 days and collects up to 27.2" (691mm) of precipitation.

Snowfall

In Boston, snow does not fall in June through September.

Ocean temperature

In June, the average ocean temperature is 58.5°F (14.7°C).
Note: To swim in 58.5°F (14.7°C) at less than 50°F (10°C), ensure you're well-protected. Without it, be prepared for a sudden jolt of cold and breathing issues. Remember, even 55.4°F (13°C) is not welcoming.

Daylight

The month with the longest days is June, with an average of 15h and 12min of daylight.
On the first day of June, sunrise is at 5:09 am and sunset at 8:14 pm. On the last day of the month, sunrise is at 5:11 am and sunset at 8:25 pm EDT.

Sunshine

The average sunshine in June is 9.1h.

UV index

June through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for average individuals.
Note: The UV index of 6 during June leads to these advisories:
Sidestep overexposure. Individuals with fair complexions risk burning in fewer than 20 minutes. Make an effort to avoid direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation, and note that objects like parasols or canopies might not offer full sun protection. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
Updated: Jun 21, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the average June temperature?

During June, Boston experiences an average high-temperature of 74.3°F (23.5°C) and a low-temperature of 57.6°F (14.2°C).

What is the average humidity in June?

In June, the average relative humidity is 74%.

How many days does it rain in June?

In Boston, in June, during 13.6 rainfall days, 2.13" (54mm) of precipitation is typically accumulated.

When it does not snow?

June through September are months without snowfall.

Does it snow in Boston in June?

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

What is the water temperature in June?

In June, the average ocean temperature 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?

With an average of 15h and 12min of daylight, June has the longest days of the year.

What is the average length of the day in June?

The average day length in June is 15h and 14min.

When are sunrise and sunset in June?

On the first day of June, sunrise is at 5:09 am and sunset at 8:14 pm. On the last day of the month, sunrise is at 5:11 am and sunset at 8:25 pm EDT.

How long on average sun shines in June?

The average sunshine duration in June is 9.1h.

What is the month with the highest UV index?

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

How high is the UV index in June?

In Boston, the average daily maximum UV index in June is 6. A UV Index reading of 6 to 7 represents a high health risk from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in June
Boston, MA

Average temperature in June - Boston, MA
  • Average high temperature in June: 74.3°F

The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (34.2°F).

  • Average low temperature in June: 57.6°F

The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (22.6°F).

Average pressure in June
Boston, MA

Average pressure in June - Boston, MA
  • Average pressure in June: 29.93"Hg

The month with the highest atmospheric pressure is November (30.06"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

Average wind speed in June
Boston, MA

Average wind speed in June - Boston, MA
  • Average wind speed in June: 6.8mph

The windiest month (with the highest average wind speed) is January (9.9mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).

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%).

Average rainfall in June
Boston, MA

Average rainfall in June - Boston, MA
  • Average rainfall in June: 2.13"

The wettest months (with the highest rainfall) are March, April and December (2.91").
The driest month (with the least rainfall) is September (1.26").

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).

Average snowfall in June
Boston, MA

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

The month with the highest snowfall is February (4.72").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in June
Boston, MA

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

The months with the highest number of snowfall days are January and February (7.6 days).
The 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 - Boston, MA
  • Average sea temperature in June: 58.4°F

The best month for swimming (with the highest average sea temperature) is August (67.9°F).
The coldest month (with the lowest average sea temperature) is February (38.1°F).

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

Average daylight in June / Average sunshine in June - Boston, MA
  • Average daylight in June: 15h and 1min

The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 6min).

  • Average sunshine in June: 9h and 1min

The month with the most sunshine is August (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).

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).

Average UV index in June
Boston, MA

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

The months with the highest UV index are June, July and August (UV index 6).
The 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 - 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 - Boston, MA
  • Average visibility in June: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

Boston, Massachusetts, USA

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