July weather forecast
Charlestown, MA

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Weather in July

July, the same as June, is a moderately hot summer month in Charlestown, Massachusetts, with temperature in the range of an average high of 81.9°F (27.7°C) and an average low of 64.8°F (18.2°C).

Temperature

July is Charlestown's warmest month, registering average high temperatures of 81.9°F (27.7°C) and lows of 64.8°F (18.2°C).

Heat index

For most parts of July, the heat index is computed to be a tropical 86°F (30°C). Enduring exposure and unrelenting activity might cause a state of weariness, potentially leading to heat cramps.
Be advised, the heat index considers values for conditions in shade and with a light breeze. With direct sunlight, the heat index could increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is a composite of temperature and humidity figures to convey how warm it feels. The impact of weather is individual, with diverse individuals experiencing it differently due to variations in body mass, height, and activity levels. Keep in mind that direct sunshine exposure can amplify the weather's effects, possibly increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Children frequently do not comprehend the need for rest and hydration. Thirst is an advanced stage of dehydration - staying hydrated, especially during extended physical exercises, is essential.

Humidity

In Charlestown, the average relative humidity in July is 73%.

Rainfall

In Charlestown, Massachusetts, during July, the rain falls for 5 days and regularly aggregates up to 0.28" (7mm) of precipitation. Throughout the year, there are 47.8 rainfall days, and 4.13" (105mm) of precipitation is accumulated.

Snowfall

In Charlestown, snow does not fall in June through October.

Daylight

The average length of the day in July is 14h and 55min.
On the first day of July in Charlestown, sunrise is at 5:11 am and sunset at 8:25 pm. On the last day of the month, sunrise is at 5:36 am and sunset at 8:04 pm EDT.

Sunshine

In Charlestown, the average sunshine in July is 10.2h.

UV index

June through August, with an average maximum UV index of 6, are months with the highest UV index in Charlestown. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for average individuals.
Note: A maximum high UV index of 6 in July translates into the following recommendations:
Take precautions and utilize sun safety practices. Protection against skin and eye damage is required. The Sun's UV radiation is most potent between 10 a.m. and 4 p.m. Try to limit direct exposure to the Sun during this period. Opt for tightly woven and loose clothing to enhance protection from the Sun.
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Frequently asked questions

What time of the year is the hottest in Charlestown?

With an average high-temperature of 81.9°F (27.7°C) and an average low-temperature of 64.8°F (18.2°C), July is the warmest month in Charlestown.

What are July temperatures in Charlestown?

The high-temperature, in July, in Charlestown, is 81.9°F (27.7°C), while the low-temperature averages to 64.8°F (18.2°C). In July, the average heat index (a.k.a. 'feels like', 'real feel'), which combines relative humidity and air temperature, is computed to be 86°F (30°C).

What is the average humidity in July in Charlestown?

In July, the average relative humidity in Charlestown is 73%.

How many days does it rain in July in Charlestown?

In July, the rain falls for 5 days. Throughout July, 0.28" (7mm) of precipitation is accumulated.

When it does not snow in Charlestown?

In Charlestown, Massachusetts, snow does not fall in June through October.

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

In Charlestown, Massachusetts, the average day length in July is 14h and 55min.

When are sunrise and sunset in July in Charlestown?

In July, on the first day of the month, sunrise is at 5:11 am and sunset at 8:25 pm. On the last day of the month, sunrise is at 5:36 am and sunset at 8:04 pm EDT.

How many hours of sunshine does Charlestown have in July?

The average sunshine duration in July in Charlestown is 10.2h.

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

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

How high is the UV index in July in Charlestown?

In Charlestown, Massachusetts, the average daily maximum UV index in July is 6. A UV Index reading of 6 to 7 represents a high health risk from exposure to Sun's UV rays.
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 July
Charlestown, MA

Average temperature in July - Charlestown, MA
  • Average high temperature in July: 81.9°F

The warmest month (with the highest average high temperature) is July (81.9°F).
The month with the lowest average high temperature is January (33.8°F).

  • Average low temperature in July: 64.8°F

The month with the highest average low temperature is July (64.8°F).
The coldest month (with the lowest average low temperature) is January (22.5°F).

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Average pressure in July
Charlestown, MA

Average pressure in July - Charlestown, MA
  • Average pressure in July: 29.94"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).

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Average wind speed in July
Charlestown, MA

Average wind speed in July - Charlestown, MA
  • Average wind speed in July: 6.1mph

The windiest month (with the highest average wind speed) is January (9.6mph).
The calmest month (with the lowest average wind speed) is August (6mph).

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Average humidity in July
Charlestown, MA

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

The month with the highest relative humidity is February (78%).
The month with the lowest relative humidity is April (69%).

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Average rainfall in July
Charlestown, MA

Average rainfall in July - Charlestown, MA
  • Average rainfall in July: 0.28"

The wettest month (with the highest rainfall) is November (0.55").
The driest month (with the least rainfall) is September (0.12").

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Average rainfall days in July
Charlestown, MA

Average rainfall days in July - Charlestown, MA
  • Average rainfall days in July: 5 days

The month with the highest number of rainy days is April (5.9 days).
The months with the least rainy days are January and September (2.9 days).

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Average snowfall in July
Charlestown, MA

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

The month with the highest snowfall is December (0.71").
The months with the least snowfall are June, July, August, September and October (0").

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Average snowfall days in July
Charlestown, MA

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

The month with the highest number of snowfall days is January (3.4 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in July / Average sunshine in July - Charlestown, MA
  • Average daylight in July: 14h and 5min

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 July: 10h 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).

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Average sunshine days in July
Charlestown, MA

Average sunshine days in July - Charlestown, MA
  • Average sunshine days in July: 22.8 days

The month with the most sunshine days is December (25.5 days).
The month with the least sunshine days is July (22.8 days).

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Average UV index in July
Charlestown, MA

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

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Average cloud cover in July
Charlestown, MA

Average cloud cover in July - Charlestown, MA
  • Average cloud cover in July: 34

The month with the most cloud cover is March (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 32).

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Average visibility in July
Charlestown, MA

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

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Charlestown, Massachusetts, USA

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