August weather forecast
Arlington, MA

Weather in August

The last month of the summer, August, is another warm month in Arlington, Massachusetts, with an average temperature ranging between min 63.3°F (17.4°C) and max 80.8°F (27.1°C).

Temperature

In Arlington, the average high-temperature in August is almost the same as in July - a still warm 80.8°F (27.1°C). In August, the average low-temperature is 63.3°F (17.4°C).

Heat index

The average heat index in August is estimated at 84.2°F (29°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 'real feel', 'felt air temperature', 'feels like', or 'apparent temperature', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. This effect is individual, with diverse people perceiving weather differently for numerous reasons (metabolic differences, wind, differences in body mass, height, and shape), and activity. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.

Humidity

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

Rainfall

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

Snowfall

June through September are months without snowfall.

Daylight

In August, the average length of the day is 13h and 51min.
On the first day of the month, sunrise is at 5:37 am and sunset at 8:04 pm. On the last day of August, sunrise is at 6:08 am and sunset at 7:21 pm EDT.

Sunshine

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

UV index

The months with the highest UV index are June through August, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The average daily UV index of 6 in August transform into the following instructions:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. 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.
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FAQ

What is the temperature in August in Arlington?

In Arlington, in August, the average high-temperature is 80.8°F (27.1°C), and the average low-temperature is 63.3°F (17.4°C). The average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which combines air temperature and relative humidity, in August is estimated at 84.2°F (29°C).

What is the average humidity in August in Arlington?

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

How many days does it rain in August in Arlington?

In Arlington, Massachusetts, during August, the rain falls for 12.3 days and regularly aggregates up to 1.69" (43mm) of precipitation.

When it does not snow in Arlington?

June through September are months without snowfall in Arlington, Massachusetts.

How many hours of daylight does Arlington have in August?

The average day length in August in Arlington, Massachusetts, is 13h and 51min.

What time are sunrise and sunset in August in Arlington?

In August, on the first day of the month, sunrise is at 5:37 am and sunset at 8:04 pm. On the last day of the month, sunrise is at 6:08 am and sunset at 7:21 pm EDT.

What month has the most sunshine in Arlington?

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

How long on average sun shines in August in Arlington?

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

When is the highest UV index in Arlington?

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

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 unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
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 51min

The month with the longest days is June (Average daylight: 15h and 14min).
The month with the shortest days is December (Average daylight: 9h and 8min).

  • Average sunshine in August: 10h and 30min

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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