Charleston
West Virginia, USA
Long-term weather forecast
Long-term weather forecast

August weather forecast and climate
Charleston, West VA

The last month of the summer, August, is also a moderately hot month in Charleston, West Virginia, with average temperature varying between 61.3°F (16.3°C) and 84.6°F (29.2°C).

Temperature

In Charleston, the average high-temperature in August is essentially the same as in July - a still moderately hot 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 special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
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', 'apparent temperature', 'felt air temperature', or 'real feel', combines air temperature and relative humidity to represent a human perceived temperature equivalent. Additional factors like pregnancy, metabolic differences, wind, and activity influence one's weather impression. Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. 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.

Rainfall

In Charleston, West Virginia, in August, it is raining for 15.5 days, with typically 2.09" (53mm) of accumulated precipitation. Throughout the year, there are 180.4 rainfall days, and 34.06" (865mm) of precipitation is accumulated.

Snowfall

In Charleston snow does not fall in June through September.

Daylight

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 are May through August, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health risk from unprotected exposure to the Sun's UV rays for ordinary individuals.
Note: In August, the average maximum UV index of 6 translate into the following recommendations:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. 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, in Charleston, the average high-temperature is 84.6°F (29.2°C), and the average low-temperature is 61.3°F (16.3°C). The average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), that combines relative humidity and air temperature, in August is calculated to 93.9°F (34.4°C).

What are the least humid months in Charleston?

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

What is the average humidity in August in Charleston?

In Charleston, West Virginia, the average relative humidity in August is 76%.

How many days does it rain in August in Charleston?

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

When it does not snow in Charleston?

June through September are months without snowfall in Charleston.

How many hours of daylight does Charleston have in August?

The average length of the day in August is 13.6h.

What month has the most sunshine in Charleston?

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

How long on average sun shines in August in Charleston?

The average sunshine in August in Charleston is 10.2h.

What are the months with the highest UV index in Charleston?

Months with the highest UV index in Charleston, West Virginia, are May through August, with an average maximum UV index of 6.

How high is the UV index in August in Charleston?

The average daily maximum UV index in August in Charleston, West Virginia, is 6. A UV Index reading of 6 to 7 represents a high health vulnerability from unprotected exposure to the UV radiation.
Average temperature in August - Charleston, West VA
  • Average high temperature in August: 29.2°C

The warmest month (with the highest average high temperature) is July (29.8°C).
The month with the lowest average high temperature is January (3.7°C).

  • Average low temperature in August: 16.3°C

The month with the highest average low temperature is July (17.4°C).
The coldest month (with the lowest average low temperature) is January (-3.7°C).

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: 53mm

The wettest month (with the highest rainfall) is May (100mm).
The driest month (with the least rainfall) is September (46mm).

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: 0mm

The month with the highest snowfall is January (140mm).
Months with the least snowfall are June, July, August and September (0mm).

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 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).