August weather forecast
Chevy Chase, MD

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Weather in August

The last month of the summer, August, is also a moderately hot month in Chevy Chase, Maryland, with an average temperature varying between 85.8°F (29.9°C) and 68°F (20°C).

Temperature

With the advent of August, Chevy Chase's high-temperatures adjust to a warm 85.8°F (29.9°C), closely aligning with the preceding month. Throughout August, the nighttime temperature averages to a pleasant 68°F (20°C).

Heat index

During August, the heat index is appraised at a fiery hot 95°F (35°C). Apply extra caution, heat cramps and heat exhaustion could happen. Heatstroke might occur with long-duration activity.
From a standpoint of the heat index, values pertain to shaded conditions and mild breezes. Exposure to the direct sun could elevate the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. The experience of temperature can be subjective, varying based on the individual's activity and heat perception, influenced by factors like wind, attire, 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 remain especially vital for babies and toddlers. Young children are more at risk than adults since they tend to sweat less. Moreover, their large skin surface in proportion to their small bodies and the high heat production due to their activities contribute to their vulnerability.
The human body keeps its cool primarily through perspiration, as this process enables sweat to evaporate, taking away the excess heat. With higher relative humidity, the rate of evaporation is reduced, resulting in increased heat retention in the body compared to drier air. If heat absorption exceeds the body's cooling ability, body temperature can elevate, resulting in potential thermal illnesses.

Humidity

In Chevy Chase, the average relative humidity in August is 70%.

Rainfall

August is the month with the most rainfall. Rain falls for 16.7 days and accumulates 3.82" (97mm) of precipitation.

Snowfall

May through October are months without snowfall in Chevy Chase, Maryland.

Daylight

The average length of the day in August in Chevy Chase, Maryland, is 13h and 39min.
On the first day of the month, sunrise is at 6:09 am and sunset at 8:19 pm. On the last day of August, in Chevy Chase, sunrise is at 6:36 am and sunset at 7:39 pm EDT.

Sunshine

In August, the average sunshine is 10.2h.

UV index

The months with the highest UV index in Chevy Chase are May through August, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV radiation for the average person.
Note: A maximum UV index of 6 in August translates into the following recommendations:
Skirt overexposure. People with light complexions might get scorched in under 20 minutes. UV radiation from the Sun is most intense between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. Stay sun-safe with clothing that is both closely woven and worn loosely.
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Frequently asked questions

How hot is August in Chevy Chase?

The high-temperature in Chevy Chase during August is 85.8°F (29.9°C) and the low-temperature is 68°F (20°C). In August, the average heat index (a.k.a. 'feels like', 'real feel'), which calculates the temperature value influenced by the moisture in the air, is appraised at 95°F (35°C).

What is the average humidity in August in Chevy Chase?

In Chevy Chase, the average relative humidity in August is 70%.

What is the wettest month in Chevy Chase?

August is the month with the most rainfall. Rain falls for 16.7 days and accumulates 3.82" (97mm) of precipitation.

How many days does it rain in August in Chevy Chase?

In Chevy Chase, during August, the rain falls for 16.7 days and regularly aggregates up to 3.82" (97mm) of precipitation.

When it does not snow in Chevy Chase?

In Chevy Chase, snow does not fall in May through October.

How many hours of daylight does Chevy Chase have in August?

In August, the average day length is 13h and 39min.

When are sunrise and sunset in August in Chevy Chase?

On the first day of August in Chevy Chase, sunrise is at 6:09 am and sunset at 8:19 pm. On the last day of the month, sunrise is at 6:36 am and sunset at 7:39 pm EDT.

How many hours of sunshine does Chevy Chase have in August?

The average sunshine duration in August is 10.2h.

What are the months with the highest UV index in Chevy Chase?

May through August, with an average maximum UV index of 6, are months with the highest UV index in Chevy Chase, Maryland.

How high is the UV index in August in Chevy Chase?

In August, the average daily maximum UV index is 6. A UV Index value of 6 to 7 symbolizes a high health risk from unprotected exposure to 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
Chevy Chase, MD

Average temperature in August - Chevy Chase, MD
  • Average high temperature in August: 85.8°F

The warmest month (with the highest average high temperature) is July (87.8°F).
The month with the lowest average high temperature is January (39.9°F).

  • Average low temperature in August: 68°F

The month with the highest average low temperature is July (69.4°F).
The coldest month (with the lowest average low temperature) is January (27°F).

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Average pressure in August
Chevy Chase, MD

Average pressure in August - Chevy Chase, MD
  • Average pressure in August: 29.99"Hg

The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).

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Average wind speed in August
Chevy Chase, MD

Average wind speed in August - Chevy Chase, MD
  • Average wind speed in August: 5.1mph

The windiest month (with the highest average wind speed) is March (8mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).

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Average humidity in August
Chevy Chase, MD

Average humidity in August - Chevy Chase, MD
  • Average humidity in August: 70%

The month with the highest relative humidity is December (76%).
The month with the lowest relative humidity is July (69%).

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Average rainfall in August
Chevy Chase, MD

Average rainfall in August - Chevy Chase, MD
  • Average rainfall in August: 3.82"

The wettest month (with the highest rainfall) is August (3.82").
The driest month (with the least rainfall) is January (1.69").

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Average rainfall days in August
Chevy Chase, MD

Average rainfall days in August - Chevy Chase, MD
  • Average rainfall days in August: 16.7 days

The month with the highest number of rainy days is May (17.1 days).
The month with the least rainy days is November (8.5 days).

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Average snowfall in August
Chevy Chase, MD

Average snowfall in August - Chevy Chase, MD
  • Average snowfall in August: 0"

The month with the highest snowfall is January (2.6").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in August
Chevy Chase, MD

Average snowfall days in August - Chevy Chase, MD
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is February (4.4 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average daylight in August /
Average sunshine in August
Chevy Chase, MD

Average daylight in August / Average sunshine in August - Chevy Chase, MD
  • Average daylight in August: 13h and 4min

The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).

  • Average sunshine in August: 10h and 1min

The month with the most sunshine is July (Average sunshine: 10h and 42min).
The months with the least sunshine are January, February and December (Average sunshine: 5h and 0min).

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Average sunshine days in August
Chevy Chase, MD

Average sunshine days in August - Chevy Chase, MD
  • Average sunshine days in August: 12.7 days

The month with the most sunshine days is November (20.4 days).
The months with the least sunshine days are May and July (12.3 days).

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Average UV index in August
Chevy Chase, MD

Average UV index in August - Chevy Chase, MD
  • Average UV index in August: 6

The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, November and December (UV index 2).

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Average cloud cover in August
Chevy Chase, MD

Average cloud cover in August - Chevy Chase, MD
  • Average cloud cover in August: 33

The month with the most cloud cover is March (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 31).

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Average visibility in August
Chevy Chase, MD

Average visibility in August - Chevy Chase, MD
  • Average visibility in August: 6mi

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

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Chevy Chase, Maryland, USA

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