August weather forecast
Wellesley Hills, MA

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Weather in August

The last month of the summer, August, is also a moderately hot month in Wellesley Hills, Massachusetts, with an average temperature fluctuating between 81°F (27.2°C) and 63°F (17.2°C).

Temperature

Wellesley Hills's weather in August displays an average high-temperature of a still warm 81°F (27.2°C), showing minor disparity from July's 81.9°F (27.7°C). August witnesses an average nighttime temperature of 63°F (17.2°C) in Wellesley Hills, Massachusetts.

Heat index

The heat index in August is appraised at 84.2°F (29°C). Persistently participating in activities during exposure may lead to fatigue and induce heat cramps.
Realize that the values for the heat index are set for shaded places and light winds. The direct sun can potentially cause the heat index to increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is the result of factoring in humidity to the air temperature, indicating perceived warmth. One's perception of temperature is subjective, varying based on their activity and individual heat perception, influenced by factors like wind, clothing, and metabolic variations. One must note that being under the direct sun can escalate the heat's effects, with the heat index possibly rising by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. Young individuals usually face greater risks than adults as their sweat production is less. Also, their larger skin surface relative to their small bodies and the high heat generation due to their activity contributes to their vulnerability.

Humidity

The average relative humidity in August in Wellesley Hills is 73%.

Rainfall

In Wellesley Hills, Massachusetts, in August, during 7.8 rainfall days, 0.43" (11mm) of precipitation is typically accumulated. In Wellesley Hills, during the entire year, the rain falls for 85.9 days and collects up to 5.87" (149mm) of precipitation.

Snowfall

In Wellesley Hills, snow does not fall in June through October.

Daylight

In Wellesley Hills, the average length of the day in August is 13h and 50min.
On the first day of August in Wellesley Hills, sunrise is at 5:38 am and sunset at 8:04 pm. On the last day of the month, sunrise is at 6:10 am and sunset at 7:20 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 in Wellesley Hills 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 unsafe exposure to UV radiation for the average person.
Note: A maximum UV index of 6 in August translates into the following recommendations:
Follow precautions and abide by sun safety rules. Deterrence of sunburn is imperative. Avoid direct Sun exposure and seek shade between 10 a.m. and 4 p.m., when UV radiation is at its peak, but keep in mind that not all shade structures provide complete protection. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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Frequently asked questions

What are August temperatures in Wellesley Hills?

An average high-temperature, in August, in Wellesley Hills, is 81°F (27.2°C) and the average low-temperature is 63°F (17.2°C). The average heat index (a.k.a. 'feels like', 'apparent temperature'), which takes the relative humidity and factors it into the air temperature reading, in August is appraised at 84.2°F (29°C).

What is the average humidity in August in Wellesley Hills?

The average relative humidity in August is 73%.

How much does it rain in Wellesley Hills in August?

In Wellesley Hills, Massachusetts, during August, the rain falls for 7.8 days and regularly aggregates up to 0.43" (11mm) of precipitation.

When it does not snow in Wellesley Hills?

June through October are months without snowfall.

What is the average length of the day in August in Wellesley Hills?

The average day length in August is 13h and 50min.

When is the sunrise / sunset in August in Wellesley Hills?

In August, on the first day of the month, sunrise is at 5:38 am and sunset at 8:04 pm. On the last day of the month, in Wellesley Hills, Massachusetts, sunrise is at 6:10 am and sunset at 7:20 pm EDT.

What month has the most sunshine in Wellesley Hills?

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

How many hours of sunshine does Wellesley Hills have in August?

In August, the average sunshine duration in Wellesley Hills, Massachusetts, is 10.5h.

What are the months with the highest UV index in Wellesley Hills?

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

What is the UV index reading in August in Wellesley Hills?

In Wellesley Hills, the average daily maximum UV index in August is 6. A UV Index reading of 6 to 7 represents a high health vulnerability 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 August
Wellesley Hills, MA

Average temperature in August - Wellesley Hills, MA
  • Average high temperature in August: 81°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 (33.6°F).

  • Average low temperature in August: 63°F

The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (21.7°F).

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Average pressure in August
Wellesley Hills, MA

Average pressure in August - Wellesley Hills, MA
  • Average pressure in August: 29.98"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
Wellesley Hills, MA

Average wind speed in August - Wellesley Hills, MA
  • Average wind speed in August: 5.8mph

The windiest month (with the highest average wind speed) is January (9.1mph).
The calmest month (with the lowest average wind speed) is August (5.8mph).

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Average humidity in August
Wellesley Hills, MA

Average humidity in August - Wellesley Hills, 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
Wellesley Hills, MA

Average rainfall in August - Wellesley Hills, MA
  • Average rainfall in August: 0.43"

The wettest month (with the highest rainfall) is November (0.67").
The driest month (with the least rainfall) is September (0.24").

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Average rainfall days in August
Wellesley Hills, MA

Average rainfall days in August - Wellesley Hills, MA
  • Average rainfall days in August: 7.8 days

The month with the highest number of rainy days is July (10.2 days).
The month with the least rainy days is February (4.1 days).

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Average snowfall in August
Wellesley Hills, MA

Average snowfall in August - Wellesley Hills, MA
  • Average snowfall in August: 0"

The month with the highest snowfall is December (0.91").
The months with the least snowfall are June, July, August, September and October (0").

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Average snowfall days in August
Wellesley Hills, MA

Average snowfall days in August - Wellesley Hills, MA
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is January (4.9 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
Wellesley Hills, MA

Average daylight in August / Average sunshine in August - Wellesley Hills, 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
Wellesley Hills, MA

Average sunshine days in August - Wellesley Hills, MA
  • Average sunshine days in August: 19.9 days

The months with the most sunshine days are January and November (22.5 days).
The month with the least sunshine days is June (17.5 days).

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Average UV index in August
Wellesley Hills, MA

Average UV index in August - Wellesley Hills, 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
Wellesley Hills, MA

Average cloud cover in August - Wellesley Hills, 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
Wellesley Hills, MA

Average visibility in August - Wellesley Hills, MA
  • Average visibility in August: 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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Wellesley Hills, Massachusetts, USA

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