August weather forecast and climate
Charleston, West VA

The calm Kanawha River in front of Charleston, West Virginia, reflecting the city in its water
The calm Kanawha River in front of Charleston, West Virginia, reflecting the city in its water
August, the last month of the summer, in Charleston, is another warm month, with average temperature ranging between min 61.3°F (16.3°C) and max 84.6°F (29.2°C).

Temperature

In Charleston, the average high-temperature is practically the same as in July - a still warm 84.6°F (29.2°C). In August, in Charleston, the average low-temperature is 61.3°F (16.3°C).

Heat index

The average heat index is calculated to a tropical 93.9°F (34.4°C). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. With the 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 'feels like', 'real feel', 'apparent temperature', or 'felt air temperature', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. Additional factors like activity, differences in body mass, height, and shape, metabolic differences, and pregnancy affect individual temperature impact. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.

Humidity

June through August and November, with an average relative humidity of 76%, are the least humid months in Charleston.

Rainfall

In August, in Charleston, the rain falls for 15.5 days. Throughout August, 2.09" (53mm) of precipitation is accumulated. In Charleston, during the entire year, the rain falls for 180.4 days and collects up to 34.06" (865mm) of precipitation.

Snowfall

In Charleston snow does not fall in June through September.

Daylight

In Charleston, the average length of the day in August is 13.6h.

Sunshine

The month with the most sunshine in Charleston is August, with an average of 10.2h of sunshine.

UV index

Months with the highest UV index in Charleston are May through August, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to the Sun's UV rays for the average person.
Note: The daily maximum UV index of 6 in August interpret into the following advice:
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. 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.

What is the temperature in August in Charleston?

In August, the average high-temperature is 84.6°F (29.2°C), and the average low-temperature is 61.3°F (16.3°C). In August, the average heat index (a.k.a. 'felt air temperature', 'feels like'), that combines both air temperature and relative humidity, is estimated at 93.9°F (34.4°C).

What is the least humid month in Charleston?

June through August and November, with an average relative humidity of 76%, are the least humid months in Charleston, West Virginia.

What is the average humidity in August in Charleston?

The average relative humidity in August in Charleston is 76%.

How much does it rain in Charleston in August?

In Charleston, in August, it is raining for 15.5 days, with typically 2.09" (53mm) of accumulated precipitation.

When it does not snow in Charleston?

In Charleston snow does not fall in June through September.

How many hours of daylight does Charleston have in August?

In August, the average length of the day in Charleston, West Virginia, is 13.6h.

What month has the most sunshine in Charleston?

August has the most sunshine of the year in Charleston, West Virginia, with an average of 10.2h of sunshine.

How many hours of sunshine does Charleston have in August?

The average sunshine in August in Charleston, West Virginia, is 10.2h.

When is the highest UV index in Charleston?

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

What is the UV index intensity in August in Charleston?

The average daily maximum UV index in August in Charleston is 6. A UV Index estimate of 6 to 7 represents a high hazard to health from the exposure to the Sun's UV radiation.
Average temperature in August - Charleston, West VA
  • Average high temperature in August: 84.6°F

The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (38.7°F).

  • Average low temperature in August: 61.3°F

The month with the highest average low temperature is July (63.3°F).
The coldest month (with the lowest average low temperature) is January (25.3°F).

Average pressure in August - Charleston, West VA
  • Average pressure in August: 30.02"

The month with the highest atmospheric pressure is November (30.16").
The month with the lowest atmospheric pressure is June (29.98").

Average wind speed in August - Charleston, West VA
  • Average wind speed in August: 4mph

The windiest month (with the highest average wind speed) is February (6.6mph).
The calmest month (with the lowest average wind speed) is August (4mph).

Average humidity in August - Charleston, West VA
  • Average humidity in August: 76%

Months with the highest relative humidity are January and February (82%).
Months with the lowest relative humidity are June, July, August and November (76%).

Average rainfall in August - Charleston, West VA
  • Average rainfall in August: 2.09"

The wettest month (with the highest rainfall) is May (3.94").
The driest month (with the least rainfall) is September (1.81").

Average rainfall days in August - Charleston, West VA
  • Average rainfall days in August: 15.5 days

The month with the highest number of rainy days is May (20.1 days).
The month with the least rainy days is November (11 days).

Average snowfall in August - Charleston, West VA
  • Average snowfall in August: 0"

The month with the highest snowfall is January (5.51").
Months with the least snowfall are June, July, August and September (0").

Average snowfall days in August - Charleston, West VA
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is January (14.1 days).
Months with the least snowfall days are June, July, August and September (0 days).

Average daylight in August / Average sunshine in August - Charleston, West VA
  • Average daylight in August: 13.6h

The month with the longest days is June (Average daylight: 14.8h).
The month with the shortest days is December (Average daylight: 9.5h).

  • Average sunshine in August: 10.2h

The month with the most sunshine is August (Average sunshine: 10.2h).
The month with the least sunshine is January (Average sunshine: 3.7h).

Average sunshine days in August - Charleston, West VA
  • Average sunshine days in August: 13.9 days

Months with the most sunshine days are October and November (16.5 days).
The month with the least sunshine days is February (8.4 days).

Average UV index in August - Charleston, West VA
  • Average UV index in August: 6

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

Average cloud cover in August - Charleston, West VA
  • Average cloud cover in August: 33

The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is August (Cloud cover 33).

Average visibility in August - Charleston, West VA
  • Average visibility in August: 5mi

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