Boston
Massachusetts, USA
Long-term weather forecast
Long-term weather forecast

July 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
Summer continues in July, with the temperature rising to the range of 65.5°F (18.6°C) and 81.3°F (27.4°C). July is Boston's hottest month and occasionally has the temperature rising above 86°F (30°C).
The weather is mildly varied, and as such, cool and wet days are not unusual. Heatwaves are a common occurrence, especially on the hottest days when the temperature hits 95°F (35°C).
July has approximately nine and a half rainfall days and 3.4" (86.4mm) precipitation. Most days are hot as there are nearly ten hours of sunshine per day.
Discovering Boston becomes more adventurous in the evening, with the daylight hours being extended to fifteen. In July, the sea temperature is 62.6°F (17°C), and the brave can already take a few dips in the ocean to keep off the high temperature. Expect the afternoon showers to be accompanied by thunderstorms.

What is the warmest month in Boston?

With an average high-temperature of 81.3°F (27.4°C) and an average low-temperature of 65.5°F (18.6°C), Julio is the warmest month.

What is the temperature in Julio in Boston?

In Julio, in Boston, the average high-temperature is 81.3°F (27.4°C), and the average low-temperature is 65.5°F (18.6°C). In Julio, the average heat index (a.k.a. 'feels like', 'apparent temperature'), that factores the actual air temperature with the relative humidity, is evaluated at 84.9°F (29.4°C).

What is the average humidity in Julio in Boston?

In Julio, the average relative humidity in Boston is 68.4%.

How many days does it rain in Julio in Boston?

In Boston, Massachusetts, in Julio, it is raining for 9.6 days, with typically 3.43" (87.1mm) of accumulated precipitation.

When it does not snow in Boston?

In Boston, Massachusetts, snow does not fall in Mayo through Octubre.

What is the ocean temperature in Julio in Boston?

In Boston, the average seawater temperature in Julio is 65.7°F (18.7°C). For most, swimming in 65.7°F (18.7°C) is not an enjoyable activity. Furthermore, controlling your breathing becomes progressively more difficult as the water temperature decreases from 69.8°F (21°C) to 59°F (15°C).

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

The average length of the day in Julio in Boston is 14.9h.

What month has the most sunshine in Boston?

The month with the most sunshine in Boston, Massachusetts, is Julio, with an average of 9.7h of sunshine.

How long on average sun shines in Julio in Boston?

In Julio, the average sunshine in Boston, Massachusetts, is 9.7h.

When is the highest UV index in Boston?

Junio through Agosto, with an average maximum UV index of 8, are months with the highest UV index in Boston.

How high is the UV index in Julio in Boston?

In Julio, the average daily maximum UV index in Boston, Massachusetts, is 8. A UV Index value of 8 to 10 symbolizes a very high health vulnerability from unsafe exposure to the Sun's UV rays.
Average temperature in July - Boston, MA
  • Average high temperature in July: 81.4°F

The warmest month (with the highest average high temperature) is July (81.4°F).
The month with the lowest average high temperature is January (35.8°F).

  • Average low temperature in July: 65.4°F

The month with the highest average low temperature is July (65.4°F).
The coldest month (with the lowest average low temperature) is January (22.2°F).

Average humidity in July - Boston, MA
  • Average humidity in July: 68.4%

The month with the highest relative humidity is September (71.8%).
The month with the lowest relative humidity is February (62%).

Average rainfall in July - Boston, MA
  • Average rainfall in July: 3.4"

The wettest month (with the highest rainfall) is March (4.3").
The driest month (with the lowest rainfall) is February (3.3").

Average rainfall days in July - Boston, MA
  • Average rainfall days in July: 9.6 days

The month with the highest number of rainy days is May (12 days).
The month with the lowest number of rainy days is September (8.6 days).

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

The month with the highest snowfall is January (12.9").
Months with the lowest snowfall are May, June, July, August, September and October (0").

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

The month with the highest number of snowfall days is January (6.7 days).
Months with the lowest number of snowfall days are May, June, July, August and September (0 days).

Average sea temperature in July - Boston, MA
  • Average sea temperature in July: 65.7°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 July / Average sunshine in July - Boston, MA
  • Average daylight in July: 14.9h

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

  • Average sunshine in July: 9.7h

The month with most sunshine is July (Average sunshine: 9.7h).
The month with least sunshine is December (Average sunshine: 4.6h).

Average UV index in July - Boston, MA
  • Average UV index in July: 8

Months with the highest UV index are June, July and August (UV index 8).
Months with the lowest UV index are January and December (UV index 1).