August weather forecast
Centreville, VA

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Weather in August

August, the last month of the summer in Centreville, is another warm month, with temperature in the range of an average high of 85.8°F (29.9°C) and an average low of 66.9°F (19.4°C).

Temperature

The average high-temperature for August is a moderately hot 85.8°F (29.9°C), closely aligning with the temperature of the preceding month. In August, Centreville encounters an average low-temperature of 66.9°F (19.4°C) during the night.

Heat index

The heat index value during August is estimated at a fiery hot 95°F (35°C). Adopt additional preventive measures, heat cramps and heat exhaustion are potential outcomes. Prolonged activity may trigger heatstroke.
In terms of the heat index, values are set with light wind and shade conditions in mind. Direct sunshine exposure could raise heat index values by as much as 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is a value derived by merging air temperature with the humidity to convey how the climate feels. The perception of temperature can be subjective, varying based on activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. Under direct sun rays, the felt temperature might be heightened, with the heat index increasing by 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Juveniles often do not understand the need to recuperate and rehydrate. Thirst is a delayed symptom of dehydration - hence, it is vital to maintain hydration, particularly during ongoing physical activities.
Through perspiration, the body has a natural mechanism to eliminate excessive heat via sweat evaporation. When relative humidity is at high levels, the evaporation rate lessens, causing the body to keep more heat than it would in less humid conditions. As the body accumulates more heat than it can release, body temperature goes up, increasing the risk of heat-related health issues.

Humidity

The average relative humidity in August is 72%.

Rainfall

August is the month with the most rainfall. Rain falls for 17.3 days and accumulates 3.78" (96mm) of precipitation.

Snowfall

May through October are months without snowfall.

Daylight

In August, the average length of the day is 13h and 38min.
On the first day of the month, sunrise is at 6:11 am and sunset at 8:20 pm. On the last day of August, sunrise is at 6:38 am and sunset at 7:41 pm EDT.

Sunshine

In August, the average sunshine is 10.2h.

UV index

May through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for ordinary individuals.
Note: An average maximum UV index of 6 in August leads to these recommendations:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. Avoid direct exposure to the Sun between 10 a.m. and 4 p.m., the peak period for UV radiation, noting that objects like parasols or canopies might not offer complete sun protection. A hat with a broad brim is indispensable, filtering out up to half of UV rays.
Updated: Jun 17, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How hot is August?

The average high-temperature, in August, in Centreville, is 85.8°F (29.9°C), while the average low-temperature is 66.9°F (19.4°C). The average heat index (a.k.a. 'real feel', 'apparent temperature'), which combines relative humidity and air temperature, in August is estimated at 95°F (35°C).

What is the average humidity in August?

In August, the average relative humidity is 72%.

What is the wettest month?

The month with the most rainfall is August, when the rain falls for 17.3 days and typically aggregates up to 3.78" (96mm) of precipitation.

How many days does it rain in August?

In Centreville, during August, the rain falls for 17.3 days and regularly aggregates up to 3.78" (96mm) of precipitation.

When it does not snow?

May through October are months without snowfall.

What is the average length of the day in August?

In Centreville, the average day length in August is 13h and 38min.

When are sunrise and sunset in August?

On the first day of August, sunrise is at 6:11 am and sunset at 8:20 pm. On the last day of the month, sunrise is at 6:38 am and sunset at 7:41 pm EDT.

How long on average sun shines in August?

In August, the average sunshine duration is 10.2h.

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

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

What is the UV index intensity in August?

In Centreville, the average daily maximum UV index in August is 6. A UV Index reading of 6 to 7 represents 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
Centreville, VA

Average temperature in August - Centreville, VA
  • Average high temperature in August: 85.8°F

The warmest month (with the highest average high temperature) is July (88°F).
The month with the lowest average high temperature is January (40.5°F).

  • Average low temperature in August: 66.9°F

The month with the highest average low temperature is July (68.4°F).
The coldest month (with the lowest average low temperature) is January (26.4°F).

Average pressure in August
Centreville, VA

Average pressure in August - Centreville, 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).

Average wind speed in August
Centreville, VA

Average wind speed in August - Centreville, VA
  • Average wind speed in August: 4.7mph

The windiest month (with the highest average wind speed) is March (7.4mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).

Average humidity in August
Centreville, VA

Average humidity in August - Centreville, VA
  • Average humidity in August: 72%

The months with the highest relative humidity are October and December (77%).
The month with the lowest relative humidity is July (71%).

Average rainfall in August
Centreville, VA

Average rainfall in August - Centreville, VA
  • Average rainfall in August: 3.78"

The wettest month (with the highest rainfall) is August (3.78").
The driest month (with the least rainfall) is September (2.01").

Average rainfall days in August
Centreville, VA

Average rainfall days in August - Centreville, VA
  • Average rainfall days in August: 17.3 days

The months with the highest number of rainy days are May and August (17.3 days).
The month with the least rainy days is November (9.1 days).

Average snowfall in August
Centreville, VA

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

The month with the highest snowfall is January (3.54").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in August
Centreville, VA

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

The month with the highest number of snowfall days is January (5.6 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

Average daylight in August /
Average sunshine in August
Centreville, VA

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

The month with the longest days is June (Average daylight: 14h and 48min).
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 48min).
The months with the least sunshine are January, February and December (Average sunshine: 5h and 12min).

Average sunshine days in August
Centreville, VA

Average sunshine days in August - Centreville, VA
  • Average sunshine days in August: 11.6 days

The month with the most sunshine days is November (19.6 days).
The month with the least sunshine days is July (11.3 days).

Average UV index in August
Centreville, VA

Average UV index in August - Centreville, VA
  • 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, February, November and December (UV index 2).

Average cloud cover in August
Centreville, VA

Average cloud cover in August - Centreville, VA
  • Average cloud cover in August: 33

The month with the most cloud cover is March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 30).

Average visibility in August
Centreville, VA

Average visibility in August - Centreville, 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).

Centreville, Virginia, USA

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