July 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 July

July, the same as June, is another warm summer month in Boston, Massachusetts, with average temperature ranging between min 64.9°F (18.3°C) and max 81.7°F (27.6°C).

Temperature

July is the warmest month, with an average high-temperature of 81.7°F (27.6°C) and an average low-temperature of 64.9°F (18.3°C).

Heat index

In July, the average heat index is appraised at a hot 86.5°F (30.3°C). Exhaustion is likely with prolonged exposure and activity. Sustaining activity may result in heat cramps.
Note that heat index values are valued for light wind and location in the shade. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature', 'feels like', 'felt air temperature', or 'real feel', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. Additional factors like metabolic differences, clothing, pregnancy, and activity influence one's weather impression. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.

Humidity

In July, the average relative humidity is 73%.

Rainfall

In July, in Boston, the rain falls for 14.7 days. Throughout July, 1.89" (48mm) of precipitation is accumulated. 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, Massachusetts, the average seawater temperature is 65.7°F (18.7°C).
Note: Swimming in 65.7°F (18.7°C) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 69.8°F (21°C).

Daylight

In July, the average length of the day in Boston is 14.9h.

Sunshine

The average sunshine in July is 10.1h.

UV index

June through August, with an average maximum UV index of 6, are months with the highest UV index in Boston. A UV Index estimate of 6 to 7 represents a high health risk from the exposure to the Sun's UV rays for average individuals.
Note: In July, the average maximum UV index of 6 translate into the following recommendations:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. 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.
[Resources]

FAQ

What is the warmest month in Boston?

With an average high-temperature of 81.7°F (27.6°C) and an average low-temperature of 64.9°F (18.3°C), July is the warmest month in Boston, Massachusetts.

What is the temperature in July in Boston?

The average high-temperature, in July, in Boston, is 81.7°F (27.6°C), while the average low-temperature is 64.9°F (18.3°C). In July, the average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which combines relative humidity and air temperature, is appraised at 86.5°F (30.3°C).

What is the average humidity in July in Boston?

The average relative humidity in July is 73%.

How many days does it rain in July in Boston?

In Boston, Massachusetts, in July, it is raining for 14.7 days, with typically 1.89" (48mm) of accumulated precipitation.

When it does not snow in Boston?

In Boston snow does not fall in June through September.

How cold is the water in July in Boston?

In Boston, Massachusetts, the average seawater temperature in July is 65.7°F (18.7°C). For swimming, a surface water temperature of 65.7°F (18.7°C) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 69.8°F (21°C).

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

In July, the average length of the day in Boston, Massachusetts, is 14.9h.

How long on average sun shines in July in Boston?

In July, the average sunshine in Boston is 10.1h.

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.

How high is the UV index in July in Boston?

The average daily maximum UV index in July in Boston, Massachusetts, is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from unprotected exposure to the UV radiation.

Average temperature in July
Boston, MA

Average temperature in July - Boston, MA
  • Average high temperature in July: 27.6°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 July: 18.3°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).

[Resources]

Average pressure in July
Boston, MA

Average pressure in July - Boston, MA
  • Average pressure in July: 1014mbar

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

[Resources]

Average wind speed in July
Boston, MA

Average wind speed in July - Boston, MA
  • Average wind speed in July: 10.1km/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).

[Resources]

Average humidity in July
Boston, MA

Average humidity in July - Boston, MA
  • Average humidity in July: 73%

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

[Resources]

Average rainfall in July
Boston, MA

Average rainfall in July - Boston, MA
  • Average rainfall in July: 48mm

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

[Resources]

Average rainfall days in July
Boston, MA

Average rainfall days in July - Boston, MA
  • Average rainfall days in July: 14.7 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).

[Resources]

Average snowfall in July
Boston, MA

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

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

[Resources]

Average snowfall days in July
Boston, MA

Average snowfall days in July - Boston, MA
  • Average snowfall days in July: 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).

[Resources]

Average sea temperature in July
Boston, MA

Average sea temperature in July - Boston, MA
  • Average sea temperature in July: 18.7°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).

[Resources]

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

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 the shortest days is December (Average daylight: 9.1h).

  • Average sunshine in July: 10.1h

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

[Resources]

Average sunshine days in July
Boston, MA

Average sunshine days in July - Boston, MA
  • Average sunshine days in July: 15.3 days

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

[Resources]

Average UV index in July
Boston, MA

Average UV index in July - Boston, MA
  • Average UV index in July: 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).

[Resources]

Average cloud cover in July
Boston, MA

Average cloud cover in July - Boston, MA
  • Average cloud cover in July: 35

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

[Resources]

Average visibility in July
Boston, MA

Average visibility in July - Boston, MA
  • Average visibility in July: 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).

[Resources]

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location
* you will be automatically redirected to the weather forecast for your location