July weather forecast
Arlington, MA

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Weather in July

QJuly in Massachusetts harbors the peak of the summer weather with maximum temperature values being recorded. The transition from June to July reveals the continual rise in temperatures, setting the trend for the hottest month. July stands out with a near-perfect weather record, including the highest recorded temperature of 82°F (27.8°C). As August approaches, the weather stays on the hot side but with slightly cooler temperatures. Despite high temperatures, residents still enjoy extended daylight hours, making July perfect for outdoor activities.

Temperature

Arlington records the warmest temperatures in July, averaging a high of 82°F (27.8°C) and a low of 64.4°F (18°C).

Heat index

The heat index value during July is appraised at a tropical 87.8°F (31°C). Unrelenting activity during exposure could cause fatigue and potentially lead to heat cramps.
Observations indicate that the heat index values are for shady locations with light wind. The presence of direct sunlight can raise the heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', evaluates the perceived heat by adding the effect of moisture in the air. One's perception of weather can be shaped by other factors, involving metabolic differences, pregnancy, and physical exertion. In the direct sunlight, the weather's impact can be amplified, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for babies and toddlers. Young ones are generally at greater risk than adults due to their limited sweating ability. In addition, their large skin surface relative to their small bodies and higher heat production from their activities add to their vulnerability.

Humidity

The average relative humidity in July in Arlington, Massachusetts, is 73%.

Rainfall

In Arlington, in July, during 15.3 rainfall days, 1.97" (50mm) of precipitation is typically accumulated. Throughout the year, in Arlington, there are 142.8 rainfall days, and 27.36" (695mm) of precipitation is accumulated.

Snowfall

In Arlington, Massachusetts, snow does not fall in June through September.

Daylight

In Arlington, the average length of the day in July is 14h and 55min.
On the first day of the month, sunrise is at 5:11 am and sunset at 8:25 pm. On the last day of July, in Arlington, Massachusetts, sunrise is at 5:36 am and sunset at 8:05 pm EDT.

Sunshine

In July, the average sunshine is 10.3h.

UV index

June through August, with an average maximum UV index of 6, are months with the highest UV index in Arlington, Massachusetts. A UV Index value of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV radiation for the average person.
Note: An average UV index of 6 in July transforms into this advice:
Take precautions against overexposure. Protection against sun damage is needed. Remember that UV radiation from the Sun is strongest between 10 a.m. and 4 p.m. Make an effort to limit direct sun exposure during this time. Opt for tightly woven and loose clothing to enhance protection from the Sun.
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Frequently asked questions

What month is the hottest in Arlington?

Arlington's warmest month, July, registers temperatures that range from a high of 82°F (27.8°C) to a low of 64.4°F (18°C).

What is the average July temperature in Arlington?

The high-temperature, in July, in Arlington, is 82°F (27.8°C), while the low-temperature averages to 64.4°F (18°C). The average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which combines air temperature and relative humidity, in July is appraised at 87.8°F (31°C).

What is the average humidity in July in Arlington?

The average relative humidity in July in Arlington, Massachusetts, is 73%.

How much does it rain in Arlington in July?

In July, the rain falls for 15.3 days. Throughout July, 1.97" (50mm) of precipitation is accumulated.

When it does not snow in Arlington?

In Arlington, Massachusetts, snow does not fall in June through September.

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

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

When are sunrise and sunset in July in Arlington?

On the first day of July in Arlington, 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 8:05 pm EDT.

How long on average sun shines in July in Arlington?

In July, the average sunshine duration is 10.3h.

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

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

What is the UV index reading in July in Arlington?

In July, the average daily maximum UV index in Arlington is 6. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's 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 July
Arlington, MA

Average temperature in July - Arlington, MA
  • Average high temperature in July: 82°F

The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (33.4°F).

  • Average low temperature in July: 64.4°F

The month with the highest average low temperature is July (64.4°F).
The coldest month (with the lowest average low temperature) is January (21.7°F).

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Average pressure in July
Arlington, MA

Average pressure in July - Arlington, MA
  • Average pressure in July: 29.94"Hg

The month with the highest atmospheric pressure is November (30.07"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

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Average wind speed in July
Arlington, MA

Average wind speed in July - Arlington, MA
  • Average wind speed in July: 6mph

The windiest month (with the highest average wind speed) is January (9.4mph).
The calmest month (with the lowest average wind speed) is August (5.9mph).

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Average humidity in July
Arlington, MA

Average humidity in July - Arlington, 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 (70%).

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Average rainfall in July
Arlington, MA

Average rainfall in July - Arlington, MA
  • Average rainfall in July: 1.97"

The wettest month (with the highest rainfall) is December (2.95").
The driest month (with the least rainfall) is September (1.3").

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Average rainfall days in July
Arlington, MA

Average rainfall days in July - Arlington, MA
  • Average rainfall days in July: 15.3 days

The months with the highest number of rainy days are May and July (15.3 days).
The month with the least rainy days is January (7.8 days).

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Average snowfall in July
Arlington, MA

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

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

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Average snowfall days in July
Arlington, MA

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

The month with the highest number of snowfall days is January (7.7 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
Arlington, MA

Average daylight in July / Average sunshine in July - Arlington, 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 2min

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 42min).

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Average sunshine days in July
Arlington, MA

Average sunshine days in July - Arlington, MA
  • Average sunshine days in July: 14.2 days

The month with the most sunshine days is November (17.6 days).
The month with the least sunshine days is April (13.3 days).

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Average UV index in July
Arlington, MA

Average UV index in July - Arlington, 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
Arlington, MA

Average cloud cover in July - Arlington, 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
Arlington, MA

Average visibility in July - Arlington, MA
  • Average visibility in July: 6mi

The months with the highest visibility are January, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is February (5mi).

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Arlington, Massachusetts, USA

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