August weather forecast
Arlington, MA

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Weather in August

August in Arlington, Massachusetts brings a gradual reduction in temperatures from the peak of July but maintains the summer warmth. A slide into cooler weather marks August, but the Riovg atmosphere remains predominantly sunny. There's a minimal reduction in temperature from July to August, as evident with an average high of 80.8°F (27.1°C). As September nears, the temperatures continue to descend, providing a gentle transition to Fall. The volume of rainfall typically decreases, revealing the declining intensity of summer.

Temperature

Arlington's weather in August displays an average high-temperature of a still moderately hot 80.8°F (27.1°C), showing minor disparity from July's 82°F (27.8°C). Arlington's average low-temperature for the month of August records at a refreshing 63.3°F (17.4°C).

Heat index

In August, the average heat index is appraised at 84.2°F (29°C). With unrelenting exposure and activity, one might experience exhaustion, leading to potential heat cramps.
Consider that heat index readings are for situations in the shade and light wind. Exposure to the direct sun might augment heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', reflects the blend of air temperature and relative humidity to give a temperature impression. Factors including metabolic differences, physical activity, and clothing are additional elements that influence the individual's temperature experience. Direct sun exposure is noteworthy in its ability to escalate the felt temperature, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values hold particular significance for children. Youngsters are usually more at risk than adults, considering they sweat less. Additionally, their high skin surface area compared to their little bodies and their high heat production due to activity increases their risk.

Humidity

In August, the average relative humidity in Arlington is 73%.

Rainfall

In Arlington, in August, it is raining for 12.3 days, with typically 1.69" (43mm) of accumulated precipitation. In Arlington, during the entire year, the rain falls for 142.8 days and collects up to 27.36" (695mm) of precipitation.

Snowfall

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

Daylight

In August, the average length of the day is 13h and 51min.
On the first day of August in Arlington, sunrise is at 5:37 am and sunset at 8:04 pm. On the last day of the month, sunrise is at 6:09 am and sunset at 7:19 pm EDT.

Sunshine

With an average of 10.5h of sunshine, August has the most sunshine of the year in Arlington.

UV index

The months with the highest UV index in Arlington, Massachusetts, are June through August, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for ordinary individuals.
Note: The maximum daily UV index of 6 in August interprets into the following recommendations:
Avoid overexposure. Fair-skinned individuals can burn in under 20 minutes. The Sun's UV radiation is most intense from 10 a.m. to 4 p.m. Try to avoid direct sun exposure during these hours. Employ a hat with a wide brim for robust protection, cutting UV exposure by half.
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Frequently asked questions

What are August temperatures in Arlington?

The high-temperature during August is 80.8°F (27.1°C) and the low-temperature is 63.3°F (17.4°C). The average heat index (a.k.a. 'feels like', 'real feel'), which calculates the temperature value influenced by the moisture in the air, in August is appraised at 84.2°F (29°C).

What is the average humidity in August in Arlington?

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

How much does it rain in Arlington in August?

In August, in Arlington, the rain falls for 12.3 days. Throughout August, 1.69" (43mm) 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 August in Arlington?

In August, the average day length is 13h and 51min.

When are sunrise and sunset in August in Arlington?

On the first day of August in Arlington, sunrise is at 5:37 am and sunset at 8:04 pm. On the last day of the month, sunrise is at 6:09 am and sunset at 7:19 pm EDT.

What month has the most sunshine in Arlington?

August has the most sunshine of the year in Arlington, Massachusetts, with an average of 10.5h of sunshine.

How many hours of sunshine does Arlington have in August?

The average sunshine duration in August in Arlington, Massachusetts, is 10.5h.

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

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

How high is the UV index in August in Arlington?

In Arlington, the average daily maximum UV index in August is 6. A UV Index estimate of 6 to 7 represents a high health threat from unsafe 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 August
Arlington, MA

Average temperature in August - Arlington, MA
  • Average high temperature in August: 80.8°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 August: 63.3°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 August
Arlington, MA

Average pressure in August - Arlington, MA
  • Average pressure in August: 29.97"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 August
Arlington, MA

Average wind speed in August - Arlington, MA
  • Average wind speed in August: 5.9mph

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 August
Arlington, MA

Average humidity in August - Arlington, MA
  • Average humidity in August: 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 August
Arlington, MA

Average rainfall in August - Arlington, MA
  • Average rainfall in August: 1.69"

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 August
Arlington, MA

Average rainfall days in August - Arlington, MA
  • Average rainfall days in August: 12.3 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 August
Arlington, MA

Average snowfall in August - Arlington, MA
  • Average snowfall in August: 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 August
Arlington, MA

Average snowfall days in August - Arlington, MA
  • Average snowfall days in August: 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 August /
Average sunshine in August
Arlington, MA

Average daylight in August / Average sunshine in August - Arlington, MA
  • Average daylight in August: 13h 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 August: 10h and 3min

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 August
Arlington, MA

Average sunshine days in August - Arlington, MA
  • Average sunshine days in August: 16.4 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 August
Arlington, MA

Average UV index in August - Arlington, MA
  • Average UV index in August: 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 August
Arlington, MA

Average cloud cover in August - Arlington, MA
  • Average cloud cover in August: 32

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 August
Arlington, MA

Average visibility in August - Arlington, MA
  • Average visibility in August: 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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