August weather forecast
Dumbarton, VA

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Weather in August

The last month of the summer, August, is also a hot month in Dumbarton, Virginia, with an average temperature ranging between max 88.3°F (31.3°C) and min 68.2°F (20.1°C).

Temperature

August brings an average high-temperature of a still tropical 88.3°F (31.3°C), nearly identical to the preceding month. Dumbarton's temperature tends to fall to an average low of 68.2°F (20.1°C) during the nights of August.

Heat index

The heat index in August is evaluated at a fiery hot 102.2°F (39°C). Implement more safety precautions, heat cramps and heat exhaustion may happen. Persistent activity could induce heatstroke.
When considering the heat index, it's pivotal to note it is for shade and mild wind conditions. Uninterrupted exposure to the sun may boost the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', measures the perceived warmth when incorporating the humidity present in the air. The individual's temperature perception can be influenced by numerous factors such as metabolic variations, physical activity, and clothing. You should know that direct sun exposure can heighten weather effects, potentially elevating the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Young individuals usually face more risks than adults due to their lower sweat production. Their large skin surface area relative to their tiny bodies and high heat production from their activities adds to their risk.
When faced with excessive heat, the human body begins to perspire, utilizing the cooling benefits of sweat evaporation. Increased relative humidity interferes with body cooling by slowing the rate of evaporation, resulting in a slower body cooling rate and a heightened feeling of heat. Should the body fail to balance its heat gain, the escalating temperature poses health challenges.

Humidity

In Dumbarton, the average relative humidity in August is 71%.

Rainfall

The month with the most rainfall in Dumbarton is August, when the rain falls for 15.1 days and typically aggregates up to 2.72" (69mm) of precipitation.

Snowfall

May through October are months without snowfall in Dumbarton.

Daylight

In August, the average length of the day in Dumbarton, Virginia, is 13h and 34min.
On the first day of the month, sunrise is at 6:14 am and sunset at 8:18 pm. On the last day of August, in Dumbarton, sunrise is at 6:39 am and sunset at 7:40 pm EDT.

Sunshine

The average sunshine in August is 10.2h.

UV index

In Dumbarton, the average daily maximum UV index in August is 6. A UV Index estimate of 6 to 7 represents a high health risk from unsafe exposure to UV radiation for the average person.
Note: In August, a daily maximum UV index of 6 leads to the following instructions:
Follow precautions and abide by sun safety rules. Deterrence of sunburn is imperative. Minimize exposure to direct sunlight and seek shade from 10 a.m. to 4 p.m., when UV radiation is most intense, but remember that shade structures may not offer complete protection. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.
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Frequently asked questions

Is it hot in Dumbarton during August?

The high-temperature, in August, in Dumbarton, is 88.3°F (31.3°C), while the low-temperature averages to 68.2°F (20.1°C). The average heat index (a.k.a. 'feels like', 'real feel'), which combines relative humidity and air temperature, in August is evaluated at 102.2°F (39°C).

What is the average humidity in August in Dumbarton?

The average relative humidity in August in Dumbarton, Virginia, is 71%.

What is the rainiest month in Dumbarton?

The month with the most rainfall in Dumbarton, Virginia, is August, when the rain falls for 15.1 days and typically aggregates up to 2.72" (69mm) of precipitation.

How much does it rain in Dumbarton in August?

In Dumbarton, Virginia, in August, during 15.1 rainfall days, 2.72" (69mm) of precipitation is typically accumulated.

When it does not snow in Dumbarton?

May through October are months without snowfall in Dumbarton, Virginia.

What is the average length of the day in August in Dumbarton?

In Dumbarton, the average day length in August is 13h and 34min.

When are sunrise and sunset in August in Dumbarton?

On the first day of August in Dumbarton, Virginia, sunrise is at 6:14 am and sunset at 8:18 pm. On the last day of the month, sunrise is at 6:39 am and sunset at 7:40 pm EDT.

How many hours of sunshine does Dumbarton have in August?

In August, the average sunshine duration in Dumbarton, Virginia, is 10.2h.

What is the UV index reading in August in Dumbarton?

The average daily maximum UV index in August is 6. A UV Index value of 6 to 7 symbolizes a high hazard to health 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
Dumbarton, VA

Average temperature in August - Dumbarton, VA
  • Average high temperature in August: 88.3°F

The warmest month (with the highest average high temperature) is July (90.7°F).
The month with the lowest average high temperature is January (44.2°F).

  • Average low temperature in August: 68.2°F

The month with the highest average low temperature is July (69.6°F).
The coldest month (with the lowest average low temperature) is January (29.5°F).

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Average pressure in August
Dumbarton, VA

Average pressure in August - Dumbarton, VA
  • 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
Dumbarton, VA

Average wind speed in August - Dumbarton, VA
  • Average wind speed in August: 5.2mph

The windiest month (with the highest average wind speed) is April (7.4mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).

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Average humidity in August
Dumbarton, VA

Average humidity in August - Dumbarton, VA
  • Average humidity in August: 71%

The month with the highest relative humidity is December (78%).
The month with the lowest relative humidity is July (68%).

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Average rainfall in August
Dumbarton, VA

Average rainfall in August - Dumbarton, VA
  • Average rainfall in August: 2.72"

The wettest month (with the highest rainfall) is August (2.72").
The driest month (with the least rainfall) is September (1.65").

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Average rainfall days in August
Dumbarton, VA

Average rainfall days in August - Dumbarton, VA
  • Average rainfall days in August: 15.1 days

The month with the highest number of rainy days is May (16.6 days).
The month with the least rainy days is November (8.8 days).

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Average snowfall in August
Dumbarton, VA

Average snowfall in August - Dumbarton, VA
  • Average snowfall in August: 0"

The month with the highest snowfall is February (1.77").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in August
Dumbarton, VA

Average snowfall days in August - Dumbarton, VA
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is February (3.5 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
Dumbarton, VA

Average daylight in August / Average sunshine in August - Dumbarton, VA
  • Average daylight in August: 13h and 4min

The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).

  • Average sunshine in August: 10h and 1min

The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 5h and 12min).

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Average sunshine days in August
Dumbarton, VA

Average sunshine days in August - Dumbarton, VA
  • Average sunshine days in August: 13.3 days

The month with the most sunshine days is November (19.5 days).
The month with the least sunshine days is May (11.9 days).

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Average UV index in August
Dumbarton, VA

Average UV index in August - Dumbarton, VA
  • Average UV index in August: 6

The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February and December (UV index 2).

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Average cloud cover in August
Dumbarton, VA

Average cloud cover in August - Dumbarton, VA
  • Average cloud cover in August: 34

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
Dumbarton, VA

Average visibility in August - Dumbarton, VA
  • 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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Dumbarton, Virginia, USA

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